Telephone area code for all of New Hampshire
Area code 603 in a 1956 map, covering the whole state. Area code 603 is the sole area code for the U.S. state of New Hampshire in the North American Numbering Plan (NANP). It was created as one of the original 86 numbering plan areas in October 1947.
In 2011, area code 603 was said to be nearing exhaustion and a second area code for New Hampshire was expected to be activated by 2013 as a statewide overlay plan.[ 1] As a result of changes in allocation policies and a reclamation of a large block of previously allocated telephone numbers, including number pooling, the exhaustion time frame has been moved to at least 2032.[ 2]
Ten-digit dialing Prior to October 2021, area code 603 had telephone numbers assigned for the central office code 988. In 2020, 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline , which created a conflict for exchanges that permit seven-digit dialing. This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.[ 3]
Central office prefixes Prefixes without date existed long before databases were published by the NANP since 1994. Prefixes located in Derry are also used in adjacent Londonderry. 976 is assigned to Concord, and requires dialling 1-603 first.
Central office prefixes in area code 603[ 4] Prefix Location County Introduced 200 Newmarket Rockingham August 16, 2011 203 Manchester Hillsborough May 14, 2003 204 Nashua Hillsborough October 13, 1999 205 Portsmouth Rockingham July 22, 1999 206 Manchester Hillsborough October 13, 1999 208 Lyme Grafton February 27, 1999 209 Keene Cheshire October 13, 1999 210 Manchester Hillsborough June 13, 2000 212 Salem Rockingham March 3, 2001 213 Derry Rockingham October 25, 2006 214 Errol Coös January 14, 2000 215 Berlin Coös May 10, 1999 216 Manchester Hillsborough July 22, 1999 217 Bristol Grafton July 11, 2001 218 Manchester Hillsborough July 22, 1999 219 Concord Merrimack February 14, 2001 221 Nashua Hillsborough October 11, 1997 222 Manchester Hillsborough May 10, 1999 223 Concord Merrimack July 4, 1995 224 Concord Merrimack 225 Concord Merrimack 226 Concord Merrimack 227 Concord Merrimack April 1, 1997 228 Concord Merrimack 229 Concord Merrimack 230 Concord Merrimack October 15, 1996 231 Derry Rockingham May 3, 2001 232 Manchester Hillsborough January 14, 2000 233 Nashua Hillsborough August 20, 2000 234 Derry Rockingham May 3, 2001 235 Derry Rockingham May 3, 2001 236 Wonalancet Carroll 237 Colebrook Coös 238 Plymouth Grafton October 13, 1999 239 Winchester Cheshire 240 Manchester Hillsborough April 15, 1996 241 Manchester Hillsborough October 11, 1997 242 Troy Cheshire 243 Woodsville Grafton July 20, 2011 244 Manchester Hillsborough August 20, 2000 245 Portsmouth Rockingham May 10, 1999 246 Colebrook Coös January 10, 1996 247 Derry Rockingham October 11, 1997 248 Dover Strafford 249 Milford Hillsborough July 4, 1995 250 Meredith Belknap May 10, 1999 251 Salem Rockingham February 28, 2012 252 West Lebanon Grafton March 22, 2001 253 Meredith Belknap 254 Plymouth Grafton February 27, 1999 255 Manchester Hillsborough February 19, 2020 256 West Chesterfield Cheshire January 10, 1996 257 Plaistow Rockingham July 22, 1999 258 Hollis Hillsborough April 14, 2017 259 Littleton Grafton August 14, 1998 260 Derry Rockingham January 4, 2013 261 Merrimack Hillsborough January 25, 1998 262 Merrimack Hillsborough January 25, 1998 263 Manchester Hillsborough January 25, 1998 264 Manchester Hillsborough January 25, 1998 265 New Boston Hillsborough March 3, 2001 266 Tilton Belknap May 10, 1999 267 Belmont Belknap 268 Suncook Merrimack 269 Rumney Grafton 270 Manchester Hillsborough January 25, 1998 271 Concord Merrimack 272 Piermont Grafton January 10, 1996 273 Laconia Belknap August 14, 1998 274 Hampton Falls Rockingham August 14, 1998 275 Derry Rockingham March 3, 2001 276 West Lebanon Grafton October 13, 1999 277 Hanover Grafton October 13, 2006 278 Jefferson Coös 279 Meredith Belknap 280 Barrington Strafford August 14, 1998 281 Nashua Hillsborough January 14, 2000 282 Canaan Grafton August 14, 1998 283 Keene Cheshire August 20, 2000 284 North Sandwich Carroll 285 Dover Strafford August 14, 1998 286 Tilton Belknap 287 Claremont Sullivan May 18, 1998 288 Nashua Hillsborough July 5, 2017 289 Manchester Hillsborough October 31, 2000 290 Concord Merrimack May 18, 1998 291 Greenville Hillsborough October 26, 2006 292 Newmarket Rockingham October 31, 2000 293 Gilford Belknap 294 Portsmouth Rockingham May 18, 1998 295 Durham Strafford April 26, 2001 296 Manchester Hillsborough January 14, 2000 297 Center Ossipee Carroll May 10, 1999 298 West Lebanon Grafton January 10, 1996 299 Bartlett Carroll July 28, 2017 300 Chester Rockingham June 9, 2003 301 Center Ossipee Carroll July 11, 2001 302 Manchester Hillsborough September 19, 2001 303 Manchester Hillsborough March 9, 2001 304 Enfield Grafton February 27, 1999 305 Bedford Hillsborough August 21, 2001 306 Lebanon Grafton December 18, 2006 307 North Conway Carroll September 6, 2012 308 Hanover Grafton September 30, 2014 309 Newport Sullivan August 9, 2013 310 Bedford Hillsborough June 30, 2001 312 Dover Strafford July 22, 1999 313 Keene Cheshire July 22, 1999 314 Manchester Hillsborough October 13, 1999 315 Manchester Hillsborough February 27, 1999 316 Milford Hillsborough October 16, 2017 317 Milan Coös November 20, 1998 318 Nashua Hillsborough June 13, 2000 319 Portsmouth Rockingham January 14, 2000 320 Nashua Hillsborough August 20, 2000 321 Nashua Hillsborough May 18, 1998 322 West Lebanon Grafton October 15, 1996 323 Tamworth Carroll 324 Nashua Hillsborough January 25, 1998 325 Manchester Hillsborough January 25, 1998 326 Berlin Coös May 18, 1998 327 Salem Rockingham October 13, 1999 328 Salem Rockingham January 14, 2000 329 Hampstead Rockingham 330 Rochester Strafford 331 Colebrook Coös May 18, 1998 332 Rochester Strafford 333 Concord Merrimack December 6, 2017 334 Portsmouth Rockingham 335 Rochester Strafford 336 Hinsdale Cheshire 337 Rochester Strafford 338 Keene Cheshire August 14, 1998 339 Derry Rockingham June 13, 2000 340 Suncook Merrimack February 12, 2001 341 Merrimack Hillsborough May 18, 1998 342 Berlin Coös 343 Dover Strafford June 13, 2000 344 Suncook Merrimack October 11, 1997 345 Merrimack Hillsborough 346 Plymouth Grafton May 18, 1998 347 Kingston Rockingham August 20, 2000 348 North Woodstock Grafton February 27, 1999 349 West Lebanon Grafton May 18, 1998 350 Rochester Strafford August 14, 1998 351 Manchester Hillsborough January 25, 1998 352 Keene Cheshire 353 Orford Grafton January 10, 1996 354 Keene Cheshire October 11, 1997 355 Keene Cheshire 356 North Conway Carroll 357 Keene Cheshire 358 Keene Cheshire 359 Lebanon Grafton October 15, 1996 360 Orford Grafton June 11, 2010 361 Manchester Hillsborough May 18, 2001 362 Atkinson Rockingham 363 Chesterfield Cheshire 364 Gilmanton Belknap 365 Merrimack Hillsborough May 4, 2001 366 Laconia Belknap 367 Madison Carroll 368 Madbury Strafford December 27, 2017 369 Concord Merrimack May 18, 1998 370 Candia Rockingham October 17, 2001 371 Peterborough Hillsborough January 14, 2000 372 Claremont Sullivan May 10, 1999 373 Portsmouth Rockingham July 22, 1999 374 Bartlett Carroll 375 Ashland Grafton July 19, 2012 376 Dover Strafford April 15, 1996 377 Merrimack Hillsborough March 3, 2001 378 Plaistow Rockingham April 1, 1997 379 Hampton Rockingham August 14, 1998 380 Portsmouth Rockingham April 1, 1997 381 West Lebanon Grafton July 6, 1997 382 Plaistow Rockingham 383 Jackson Carroll 384 Manchester Hillsborough February 27, 1999 385 Manchester Hillsborough July 4, 1995 386 Nashua Hillsborough July 22, 1999 387 Laconia Belknap 388 Colebrook Coös May 10, 1999 389 Durham Strafford October 13, 1999 390 Jefferson Coös November 20, 1998 391 Manchester Hillsborough October 31, 2000 392 Winchester Cheshire November 7, 2006 393 Laconia Belknap May 4, 2001 394 Newton Rockingham January 10, 1996 395 Exeter Rockingham August 14, 1998 396 Merrimack Hillsborough October 31, 2000 397 Durham Strafford October 31, 2000 398 West Lebanon Grafton January 10, 1996 399 Westmoreland Cheshire 400 Hollis Hillsborough August 31, 2011 401 Hampton Rockingham October 17, 2001 402 Nashua Hillsborough September 6, 2012 403 Rochester Strafford July 31, 2018 404 Conway Carroll January 4, 2016 405 Somersworth Strafford April 20, 2016 406 Bow Merrimack December 21, 2018 407 Belmont Belknap May 6, 2015 408 Berlin Coös December 9, 2015 409 Laconia Belknap October 13, 2015 410 Manchester Hillsborough July 22, 1999 412 Plymouth Grafton February 27, 1999 413 Manchester Hillsborough June 13, 2000 414 Sunapee Sullivan May 10, 1999 415 Concord Merrimack May 10, 1999 416 Raymond Rockingham December 21, 2018 417 Nashua Hillsborough April 14, 2015 418 Exeter Rockingham January 14, 2000 419 Suncook Merrimack July 22, 1999 420 Nashua Hillsborough January 25, 1998 421 Derry Rockingham 422 Portsmouth Rockingham 423 Merrimack Hillsborough 424 Merrimack Hillsborough 425 Derry Rockingham 426 Derry Rockingham 427 Portsmouth Rockingham 428 Henniker Merrimack 429 Merrimack Hillsborough 430 Portsmouth Rockingham 431 Portsmouth Rockingham 432 Derry Rockingham 433 Portsmouth Rockingham 434 Derry Rockingham 435 Pittsfield Merrimack 436 Portsmouth Rockingham 437 Derry Rockingham 438 Nashua Hillsborough August 20, 2000 439 Keene Cheshire January 14, 2000 440 Merrimack Hillsborough May 18, 1998 441 Rochester Strafford October 13, 1999 442 Lebanon Grafton January 25, 1998 443 Lebanon Grafton 444 Littleton Grafton 445 Walpole Cheshire January 10, 1996 446 Marlow Cheshire 447 Conway Carroll 448 Lebanon Grafton 449 Milan Coös 450 Concord Merrimack September 11, 2018 451 Concord Merrimack April 8, 2020 452 Conway Carroll May 10, 1999 453 Hampstead Rockingham October 12, 2020 454 Sunapee Sullivan May 10, 1999 455 Laconia Belknap January 25, 1998 456 Warner Merrimack 457 Dover Strafford November 27, 2020 458 Salem Rockingham July 22, 1999 459 Nashua Hillsborough October 13, 1999 460 Manchester Hillsborough January 25, 1998 461 Merrimack Hillsborough July 6, 1997 462 Deerfield Rockingham May 10, 1999 463 Deerfield Rockingham 464 Hillsborough Hillsborough 465 Hollis Hillsborough 466 Gorham Coös 467 Manchester Hillsborough July 4, 1995 468 Seabrook Rockingham October 13, 1999 469 Lebanon Grafton 470 Concord Merrimack April 19, 2001 471 Bedford Hillsborough 472 Bedford Hillsborough 473 Milton Strafford 474 Seabrook Rockingham 475 Salem Rockingham January 14, 2000 476 South Tamworth Carroll 477 Claremont Sullivan February 27, 1999 478 Hillsborough Hillsborough 479 Derry Rockingham 480 Manchester Hillsborough October 15, 1996 481 Manchester Hillsborough 482 Errol Coös 483 Candia Rockingham 484 Nashua Hillsborough September 21, 2016 485 Hooksett Hillsborough 486 Manchester Hillsborough November 20, 1998 487 New Boston Hillsborough 488 Manchester Hillsborough June 13, 2000 489 Manchester Hillsborough October 13, 1999 490 Derry Rockingham February 11, 1995 491 Concord Merrimack July 1, 1996 492 Manchester Hillsborough 493 Merrimack Hillsborough 494 Merrimack Hillsborough 495 Washington Sullivan 496 Concord Merrimack 497 Goffstown Hillsborough 498 Portsmouth Rockingham February 11, 1995 499 Keene Cheshire May 18, 1998 500 Tilton Belknap June 15, 2020 501 Portsmouth Rockingham June 13, 2000 502 Portsmouth Rockingham June 13, 2000 503 Lancaster Coös November 20, 1998 504 Claremont Sullivan February 27, 1999 505 Derry Rockingham October 9, 2002 506 Manchester Hillsborough October 29, 2018 507 Rochester Strafford July 28, 2015 508 Pelham Hillsborough August 8, 2001 509 Dover Strafford September 24, 2001 510 Meriden Sullivan March 29, 2010 512 Manchester Hillsborough May 10, 1999 513 Concord Merrimack June 13, 2000 514 Nashua Hillsborough January 21, 2021 515 Wolfeboro Carroll July 22, 1999 516 Dover Strafford May 10, 1999 517 Merrimack Hillsborough February 27, 1999 518 Manchester Hillsborough July 22, 1999 519 Exeter Rockingham October 4, 2018 520 Laconia Belknap July 1, 1996 521 Nashua Hillsborough October 13, 1999 522 Sanbornville Carroll 523 Canaan Grafton 524 Gilford Belknap 525 Hancock Hillsborough 526 New London Merrimack 527 Laconia Belknap 528 Laconia Belknap 529 Weare Hillsborough 530 Bristol Grafton February 22, 2002 531 Portsmouth Rockingham February 11, 1995 532 Jaffrey Cheshire 533 Merrimack Hillsborough 534 Dover Strafford 535 Plymouth Grafton 536 Plymouth Grafton 537 Derry Rockingham April 15, 1996 538 Pittsburg Coös 539 Center Ossipee Carroll 540 Goffstown Hillsborough August 21, 2001 541 Manchester Hillsborough May 21, 2001 542 Claremont Sullivan 543 Claremont Sullivan 544 Tuftonboro Carroll 545 Concord Merrimack October 13, 1999 546 Nashua Hillsborough January 14, 2000 547 Greenfield Hillsborough 548 Derry Rockingham July 1, 1996 549 Derry Rockingham May 18, 1998 550 Dover Strafford November 18, 2021 551 Manchester Hillsborough 552 Manchester Hillsborough January 25, 1998 553 Derry Rockingham September 11, 1994 554 Milford Hillsborough January 25, 1998 556 Laconia Belknap May 18, 1998 557 Nashua Hillsborough May 18, 1998 558 Claremont Sullivan 559 Portsmouth Rockingham April 1, 1997 560 Salem Rockingham August 20, 2000 561 Nashua Hillsborough September 11, 1994 562 Peterborough Hillsborough January 25, 1998 563 Harrisville Cheshire 564 Manchester Hillsborough 565 Concord Merrimack August 14, 1998 566 Nashua Hillsborough February 11, 1995 567 Peterborough Hillsborough May 18, 1998 568 Concord Merrimack August 6, 2002 569 Wolfeboro Carroll 570 Portsmouth Rockingham August 14, 1998 571 Derry Rockingham April 1, 1997 572 Nashua Hillsborough January 10, 1996 573 Manchester Hillsborough August 14, 1998 574 Alstead Cheshire August 14, 1998 575 Littleton Grafton August 14, 1998 576 Wentworth Grafton August 14, 1998 577 Nashua Hillsborough September 11, 1994 578 Nashua Hillsborough January 10, 1996 579 Nashua Hillsborough July 6, 1997 580 Exeter Rockingham August 20, 2000 581 Laconia Belknap August 20, 2000 582 Merrimack Hillsborough July 1, 1996 583 Exeter Rockingham May 18, 1998 584 Concord Merrimack June 29, 2021 585 Fitzwilliam Cheshire 586 Jefferson Coös 587 Manchester Hillsborough January 25, 1998 588 Antrim Hillsborough 589 Nashua Hillsborough January 14, 2000 590 Durham Strafford May 10, 1999 591 Manchester Hillsborough October 31, 2000 592 Chesterfield Cheshire August 14, 1998 593 Jaffrey Cheshire June 26, 2003 594 Nashua Hillsborough 595 Nashua Hillsborough 596 Nashua Hillsborough 597 Lyme Grafton August 14, 1998 598 Nashua Hillsborough 599 Nashua Hillsborough 600 Manchester Hillsborough May 29, 2020 601 Hampton Rockingham June 30, 2001 602 Rollinsford Strafford December 4, 2020 604 Hampton Rockingham April 24, 2019 605 Dover Strafford December 12, 2016 606 Manchester Hillsborough May 10, 1999 607 Chesterfield Cheshire August 13, 2020 608 Northwood Rockingham January 22, 2002 609 Dover Strafford August 20, 2000 610 Portsmouth Rockingham June 13, 2000 612 Plaistow Rockingham October 13, 1999 613 Colebrook Coös November 20, 1998 614 West Chesterfield Cheshire November 20, 1998 615 Manchester Hillsborough February 27, 1999 616 Littleton Grafton February 27, 1999 617 Dover Strafford June 13, 2000 618 Warren Grafton August 14, 1998 620 Merrimack Hillsborough April 1, 1997 621 Manchester Hillsborough January 10, 1996 622 Manchester Hillsborough 623 Manchester Hillsborough 624 Manchester Hillsborough 625 Manchester Hillsborough 626 Manchester Hillsborough 627 Manchester Hillsborough 628 Manchester Hillsborough 629 Manchester Hillsborough July 6, 1997 630 Laconia Belknap January 22, 2002 631 Lancaster Coös February 22, 2002 632 Enfield Grafton 633 Manchester Hillsborough May 21, 2001 634 Manchester Hillsborough 635 Pelham Hillsborough 636 Groveton Coös 637 Bedford Hillsborough January 25, 1998 638 Monroe Grafton January 10, 1996 639 Manchester Hillsborough 640 Hanover Grafton 641 Manchester Hillsborough 642 Kingston Rockingham 643 Hanover Grafton 644 Manchester Hillsborough 645 Manchester Hillsborough 646 Hanover Grafton 647 Manchester Hillsborough 648 Andover Merrimack 650 Hanover Grafton 651 Center Ossipee Carroll January 25, 1998 652 Rochester Strafford 653 Hanover Grafton May 18, 1998 654 Wilton Hillsborough 655 Manchester Hillsborough July 1, 1996 656 Manchester Hillsborough April 15, 1996 657 Manchester Hillsborough January 14, 2000 658 Exeter Rockingham May 10, 1999 659 Newmarket Rockingham 660 Goffstown Hillsborough February 22, 2002 661 Manchester Hillsborough October 15, 1996 662 Conway Carroll January 25, 1998 663 Manchester Hillsborough October 15, 1996 664 Barrington Strafford 665 Manchester Hillsborough May 18, 1998 666 Manchester Hillsborough 667 Lebanon Grafton August 14, 1998 668 Manchester Hillsborough 669 Manchester Hillsborough 670 Merrimack Hillsborough October 31, 2000 671 Franklin Merrimack August 14, 1998 672 Milford Hillsborough 673 Milford Hillsborough 674 Manchester Hillsborough November 20, 1998 675 Cornish Sullivan January 10, 1996 676 Hanover Grafton May 10, 1999 677 Meredith Belknap August 14, 1998 678 Lebanon Grafton August 14, 1998 679 Epping Rockingham 680 Hillsborough Hillsborough April 23, 2004 681 Salem Rockingham June 13, 2000 682 Manchester Hillsborough February 27, 1999 683 Merrimack Hillsborough October 13, 1999 684 Lancaster Coös May 18, 1998 685 Salem Rockingham October 13, 1999 686 Exeter Rockingham September 12, 2002 687 Jackson Carroll May 10, 1999 688 Concord Merrimack February 24, 2021 689 Nashua Hillsborough August 20, 2000 690 Claremont Sullivan August 14, 1998 692 Somersworth Strafford 693 Epping Rockingham August 20, 2000 694 Chatham Carroll January 10, 1996 695 Manchester Hillsborough 696 Manchester Hillsborough May 17, 2021 701 Rochester Strafford October 22, 2009 702 Kingston Rockingham July 8, 2002 703 Manchester Hillsborough August 18, 2004 704 Derry Rockingham March 26, 2019 705 Salisbury Merrimack November 17, 2009 706 Raymond Rockingham June 13, 2000 707 Meredith Belknap July 28, 2004 708 Canterbury Merrimack February 18, 2005 709 Plainfield Sullivan August 17, 2004 710 Washington Sullivan March 2, 2021 712 Warren Grafton November 20, 1998 714 Manchester Hillsborough November 19, 2001 715 Concord Merrimack October 13, 1999 716 Manchester Hillsborough June 4, 2008 717 Concord Merrimack January 14, 2000 718 Nashua Hillsborough May 8, 2009 719 Keene Cheshire May 10, 1999 721 Milford Hillsborough July 8, 2002 722 Manchester Hillsborough May 14, 2008 723 Berlin Coös February 27, 1999 724 Manchester Hillsborough January 14, 2000 725 Tamworth Carroll November 20, 1998 726 Plymouth Grafton 727 Lebanon Grafton August 20, 2000 728 North Woodstock Grafton May 18, 1998 729 Tilton Belknap August 14, 1998 730 North Conway Carroll August 14, 1998 731 Concord Merrimack July 1, 1996 732 Nashua Hillsborough January 25, 1998 733 North Conway Carroll August 14, 1998 734 Epping Rockingham August 14, 1998 735 Andover Merrimack 736 Northwood Merrimack 737 Laconia Belknap May 10, 1999 738 Concord Merrimack August 20, 2000 739 North Woodstock Grafton November 20, 1998 740 Dover Strafford 741 New Boston Hillsborough August 20, 2000 742 Dover Strafford 743 Dover Strafford 744 Bristol Grafton 745 Lincoln Grafton 746 Contoocook Merrimack 747 Woodsville Grafton 748 Warner Merrimack June 20, 2003 749 Dover Strafford 750 Dover Strafford July 6, 1997 751 Nashua Hillsborough January 25, 1998 752 Berlin Coös 753 Concord Merrimack 754 Lancaster Coös May 10, 1999 755 Farmington Strafford 756 North Walpole Cheshire 757 Keene Cheshire January 14, 2000 758 Hampton Rockingham October 31, 2000 759 Nashua Hillsborough July 1, 1996 760 Seabrook Rockingham May 20, 2002 761 Littleton Grafton May 10, 1999 762 Keene Cheshire April 15, 1996 763 Sunapee Sullivan 764 Warren Grafton 765 Nashua Hillsborough June 13, 2000 766 Portsmouth Rockingham November 20, 1998 767 Dover Strafford 768 Andover Merrimack 769 Manchester Hillsborough August 14, 1998 770 Exeter Rockingham February 11, 1995 771 Manchester Hillsborough 772 Exeter Rockingham 773 Exeter Rockingham February 11, 1995 774 Bow Merrimack 775 Exeter Rockingham April 1, 1997 776 New Durham Strafford 777 Exeter Rockingham July 6, 1997 778 Exeter Rockingham 779 Plymouth Grafton August 14, 1998 780 Canaan Grafton November 20, 1998 781 Dover Strafford April 15, 1996 782 Manchester Hillsborough May 18, 1998 783 Canterbury Merrimack 784 Peterborough Hillsborough August 14, 1998 785 Manchester Hillsborough June 13, 2000 786 Wentworth Grafton 787 Woodsville Grafton 788 Lancaster Coös 789 Andover Merrimack January 14, 2000 790 West Lebanon Grafton October 25, 2002 791 Nashua Hillsborough 792 Manchester Hillsborough May 10, 1999 793 Exeter Rockingham May 20, 2002 795 Lyme Grafton 796 Concord Merrimack 797 Plaistow Rockingham August 14, 1998 798 Loudon Merrimack 799 Manchester Hillsborough March 3, 2001 800 Meredith Belknap December 9, 2019 801 Milford Hillsborough March 16, 2001 803 Keene Cheshire October 20, 2016 808 Antrim Hillsborough November 23, 2009 809 Nashua Hillsborough March 13, 2007 810 Nashua Hillsborough June 1, 2021 812 Portsmouth Rockingham June 13, 2000 813 Center Barnstead Belknap October 30, 2009 814 Seabrook Rockingham July 30, 2010 815 Durham Strafford December 6, 2007 816 Nashua Hillsborough May 10, 1999 817 Dover Strafford December 19, 2001 818 Derry Rockingham July 8, 2002 819 Plaistow Rockingham November 20, 1998 820 Merrimack Hillsborough March 10, 2008 821 Nashua Hillsborough May 10, 1999 822 Rochester Strafford August 20, 2000 823 Franconia Grafton 824 Nashua Hillsborough January 25, 1998 825 Manchester Hillsborough January 13, 2022 826 Charlestown Sullivan 827 Harrisville Cheshire 828 Portsmouth Rockingham January 22, 2002 829 Sunapee Sullivan August 14, 1998 831 Greenfield Hillsborough December 14, 2004 832 Laconia Belknap August 20, 2000 833 Rochester Strafford October 5, 2004 834 Dover Strafford June 13, 2000 835 Alstead Cheshire 836 Manchester Hillsborough October 25, 2002 837 Whitefield Coös 838 Lisbon Grafton 839 Farmington Strafford October 13, 2006 840 Epsom Merrimack November 16, 2009 841 Somersworth Strafford October 31, 2000 842 Dover Strafford August 20, 2000 843 Newport Sullivan May 10, 1999 845 Derry Rockingham January 14, 2000 846 Bethlehem Coös 847 Sullivan Cheshire 848 Concord Merrimack July 1, 1996 850 Lisbon Grafton 851 Manchester Hillsborough October 13, 1999 852 Keene Cheshire March 3, 2001 853 Woodsville Grafton May 10, 1999 854 Manchester Hillsborough December 6, 2002 855 Alton Belknap October 30, 2009 856 Concord Merrimack January 14, 2000 857 Suncook Merrimack April 21, 2022 858 Manchester Hillsborough June 13, 2000 859 New Durham Strafford 860 Manchester Hillsborough July 1, 1996 861 Tamworth Carroll August 14, 1998 862 Durham Strafford April 26, 2001 863 Newport Sullivan 864 Nashua Hillsborough May 10, 1999 865 Newport Sullivan February 27, 1999 866 Dover Strafford March 3, 2001 867 Manchester Hillsborough February 27, 1999 868 Durham Strafford 869 Bethlehem Coös 870 Salem Rockingham October 11, 1997 871 Sanbornville Carroll November 20, 1998 872 Gilmanton Ironworks Belknap October 30, 2009 873 Sunapee Sullivan August 14, 1998 874 Bath Grafton August 14, 1998 875 Alton Belknap 876 Marlborough Cheshire 877 New London Merrimack November 17, 2009 878 Greenville Hillsborough 879 Nashua Hillsborough May 18, 1998 880 Nashua Hillsborough 881 Nashua Hillsborough 882 Nashua Hillsborough 883 Nashua Hillsborough 884 Nashua Hillsborough 885 Nashua Hillsborough 886 Nashua Hillsborough 887 Chester Rockingham 888 Nashua Hillsborough 889 Nashua Hillsborough 890 Salem Rockingham 891 Nashua Hillsborough 892 Concord Merrimack March 3, 2001 893 Salem Rockingham 894 Salem Rockingham 895 Raymond Rockingham 896 Salem Rockingham April 15, 1996 897 Nashua Hillsborough July 4, 1995 898 Salem Rockingham 899 Rindge Cheshire 900 Newport Sullivan June 15, 2020 901 Conway Carroll February 26, 2016 902 Newbury Merrimack November 17, 2009 903 Keene Cheshire October 13, 2005 904 Walpole Cheshire August 22, 2005 905 Barrington Strafford September 20, 2006 906 Rochester Strafford October 30, 2009 910 Hampton Rockingham August 20, 2000 912 Salem Rockingham August 20, 2000 913 Manchester Hillsborough June 13, 2000 915 Gorham Coös February 22, 2002 918 Hampton Rockingham April 19, 2002 921 Nashua Hillsborough July 6, 2009 922 North Stratford Coös 923 Rochester Strafford August 14, 1998 924 Peterborough Hillsborough 925 Peterborough Hillsborough May 10, 1999 926 Hampton Rockingham 927 New London Merrimack 928 Suncook Merrimack June 13, 2000 929 Hampton Rockingham 930 Nashua Hillsborough February 27, 1999 931 Concord Merrimack May 21, 2015 932 Manchester Hillsborough August 20, 2008 933 Greenfield Hillsborough July 7, 2008 934 Franklin Merrimack 935 Manchester Hillsborough March 27, 2006 937 Meredith Belknap June 6, 2008 938 Newbury Merrimack 939 North Conway Carroll January 10, 1996 941 Wolfeboro Carroll August 14, 1998 942 Northwood Rockingham 943 Nashua Hillsborough November 20, 1998 944 East Kingston Rockingham December 19, 2001 945 Manchester Hillsborough August 1, 2007 947 Plymouth Grafton May 10, 1999 948 Rochester Strafford February 26, 2008 951 Milan Coös November 20, 1998 952 Salem Rockingham August 14, 1998 953 Dover Strafford August 20, 2000 957 Portsmouth Rockingham January 22, 2002 960 Campton Grafton January 22, 2008 961 Chichester Merrimack November 17, 2009 964 Rye Rockingham 965 Derry Rockingham August 20, 2000 966 Nashua Hillsborough February 22, 2002 967 Hampton Rockingham August 14, 1998 968 Holderness Grafton 969 Portsmouth Rockingham May 20, 2002 970 Dover Strafford March 22, 2006 971 Rindge Cheshire May 10, 1999 973 Rochester Strafford May 20, 2002 974 Plaistow Rockingham May 10, 1999 975 Concord Merrimack November 16, 2009 977 Andover Merrimack November 17, 2009 978 Dover Strafford March 16, 2001 986 North Conway Carroll April 19, 2002 988 Portsmouth Rockingham October 17, 2001 989 Woodsville Grafton 991 Littleton Grafton February 22, 2002 992 Andover Merrimack November 20, 1998 994 Rochester Strafford May 10, 1999 995 Henniker Merrimack August 9, 2002 996 Plymouth Grafton August 9, 2002 997 Hampton Rockingham August 9, 2002 998 Laconia Belknap July 8, 2002 999 Salem Rockingham December 9, 2019
References ^ "New Hampshire Public Utilities Commission". Archived from the original on September 29, 2011. Retrieved November 20, 2010 . ^ Dave Brooks (18 May 2016). "Area code 603 will reign supreme thanks to technology". The Concord Monitor . Retrieved 17 March 2019 . ^ "Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)" (PDF) . North American Numbering Plan Administrator. January 8, 2021. Retrieved March 9, 2021 . ^ "Area Code 603". www.area-codes.com . Retrieved 2022-05-12 .
External links NANPA area code map of New Hampshire List of exchanges from AreaCodeDownload.com, 603 Area Code December 2010 newspaper article about then-uncertain future of 603