Area code 603
{{Short description|Telephone area code for all of New Hampshire}}
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.{{cite web|url=http://www.puc.nh.gov/Regulatory/Docketbk/2010/10-211.htm |title=New Hampshire Public Utilities Commission |access-date=November 20, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20110929085914/http://www.puc.nh.gov/Regulatory/Docketbk/2010/10-211.htm |archive-date=September 29, 2011 }} 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.{{cite web|url=https://www.concordmonitor.com/area-code-603-2196133|title=Area code 603 will reign supreme thanks to technology|publisher=The Concord Monitor|access-date=17 March 2019|date=18 May 2016|author=Dave Brooks}}
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.{{cite web|url=https://nationalnanpa.com/pdf/PL_556.pdf|date=January 8, 2021|publisher=North American Numbering Plan Administrator |title=Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline)|access-date=March 9, 2021}}
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.
| class="wikitable sortable"
|+Central office prefixes in area code 603{{Cite web |title=Area Code 603 |url=https://www.area-codes.com/area-code/area-code-603.asp |access-date=2022-05-12 |website=www.area-codes.com}} !Prefix !Location !County !Introduced |
| 200
|August 16, 2011 |
| 203
|May 14, 2003 |
| 204
|October 13, 1999 |
| 205
|July 22, 1999 |
| 206
|October 13, 1999 |
| 208
|Lyme |February 27, 1999 |
| 209
|October 13, 1999 |
| 210
|June 13, 2000 |
| 212
|March 3, 2001 |
| 213
|October 25, 2006 |
| 214
|Coös |January 14, 2000 |
| 215
|Coös |May 10, 1999 |
| 216
|July 22, 1999 |
| 217
|July 11, 2001 |
| 218
|July 22, 1999 |
| 219
|February 14, 2001 |
| 221
|October 11, 1997 |
| 222
|May 10, 1999 |
| 223
|July 4, 1995 |
| 224
| |
| 225
| |
| 226
| |
| 227
|April 1, 1997 |
| 228
| |
| 229
| |
| 230
|October 15, 1996 |
| 231
|May 3, 2001 |
| 232
|January 14, 2000 |
| 233
|August 20, 2000 |
| 234
|May 3, 2001 |
| 235
|May 3, 2001 |
| 236
| |
| 237
|Coös | |
| 238
|October 13, 1999 |
| 239
| |
| 240
|April 15, 1996 |
| 241
|October 11, 1997 |
| 242
|Troy | |
| 243
|July 20, 2011 |
| 244
|August 20, 2000 |
| 245
|May 10, 1999 |
| 246
|Coös |January 10, 1996 |
| 247
|October 11, 1997 |
| 248
| |
| 249
|July 4, 1995 |
| 250
|May 10, 1999 |
| 251
|February 28, 2012 |
| 252
|March 22, 2001 |
| 253
| |
| 254
|February 27, 1999 |
| 255
|February 19, 2020 |
| 256
|January 10, 1996 |
| 257
|July 22, 1999 |
| 258
|April 14, 2017 |
| 259
|August 14, 1998 |
| 260
|January 4, 2013 |
| 261
|January 25, 1998 |
| 262
|January 25, 1998 |
| 263
|January 25, 1998 |
| 264
|January 25, 1998 |
| 265
|March 3, 2001 |
| 266
|May 10, 1999 |
| 267
| |
| 268
| |
| 269
| |
| 270
|January 25, 1998 |
| 271
| |
| 272
|January 10, 1996 |
| 273
|August 14, 1998 |
| 274
|August 14, 1998 |
| 275
|March 3, 2001 |
| 276
|October 13, 1999 |
| 277
|October 13, 2006 |
| 278
|Coös | |
| 279
| |
| 280
|August 14, 1998 |
| 281
|January 14, 2000 |
| 282
|August 14, 1998 |
| 283
|August 20, 2000 |
| 284
| |
| 285
|August 14, 1998 |
| 286
| |
| 287
|May 18, 1998 |
| 288
|July 5, 2017 |
| 289
|October 31, 2000 |
| 290
|May 18, 1998 |
| 291
|October 26, 2006 |
| 292
|October 31, 2000 |
| 293
| |
| 294
|May 18, 1998 |
| 295
|April 26, 2001 |
| 296
|January 14, 2000 |
| 297
|May 10, 1999 |
| 298
|January 10, 1996 |
| 299
|July 28, 2017 |
| 300
|June 9, 2003 |
| 301
|July 11, 2001 |
| 302
|September 19, 2001 |
| 303
|March 9, 2001 |
| 304
|February 27, 1999 |
| 305
|August 21, 2001 |
| 306
|December 18, 2006 |
| 307
|September 6, 2012 |
| 308
|September 30, 2014 |
| 309
|August 9, 2013 |
| 310
|June 30, 2001 |
| 312
|July 22, 1999 |
| 313
|July 22, 1999 |
| 314
|October 13, 1999 |
| 315
|February 27, 1999 |
| 316
|October 16, 2017 |
| 317
|Coös |November 20, 1998 |
| 318
|June 13, 2000 |
| 319
|January 14, 2000 |
| 320
|August 20, 2000 |
| 321
|May 18, 1998 |
| 322
|October 15, 1996 |
| 323
| |
| 324
|January 25, 1998 |
| 325
|January 25, 1998 |
| 326
|Coös |May 18, 1998 |
| 327
|October 13, 1999 |
| 328
|January 14, 2000 |
| 329
| |
| 330
| |
| 331
|Coös |May 18, 1998 |
| 332
| |
| 333
|December 6, 2017 |
| 334
| |
| 335
| |
| 336
| |
| 337
| |
| 338
|August 14, 1998 |
| 339
|June 13, 2000 |
| 340
|February 12, 2001 |
| 341
|May 18, 1998 |
| 342
|Coös | |
| 343
|June 13, 2000 |
| 344
|October 11, 1997 |
| 345
| |
| 346
|May 18, 1998 |
| 347
|August 20, 2000 |
| 348
|February 27, 1999 |
| 349
|May 18, 1998 |
| 350
|August 14, 1998 |
| 351
|January 25, 1998 |
| 352
| |
| 353
|January 10, 1996 |
| 354
|October 11, 1997 |
| 355
| |
| 356
| |
| 357
| |
| 358
| |
| 359
|October 15, 1996 |
| 360
|June 11, 2010 |
| 361
|May 18, 2001 |
| 362
| |
| 363
| |
| 364
| |
| 365
|May 4, 2001 |
| 366
| |
| 367
| |
| 368
|December 27, 2017 |
| 369
|May 18, 1998 |
| 370
|October 17, 2001 |
| 371
|January 14, 2000 |
| 372
|May 10, 1999 |
| 373
|July 22, 1999 |
| 374
| |
| 375
|July 19, 2012 |
| 376
|April 15, 1996 |
| 377
|March 3, 2001 |
| 378
|April 1, 1997 |
| 379
|August 14, 1998 |
| 380
|April 1, 1997 |
| 381
|July 6, 1997 |
| 382
| |
| 383
| |
| 384
|February 27, 1999 |
| 385
|July 4, 1995 |
| 386
|July 22, 1999 |
| 387
| |
| 388
|Coös |May 10, 1999 |
| 389
|October 13, 1999 |
| 390
|Coös |November 20, 1998 |
| 391
|October 31, 2000 |
| 392
|November 7, 2006 |
| 393
|May 4, 2001 |
| 394
|January 10, 1996 |
| 395
|August 14, 1998 |
| 396
|October 31, 2000 |
| 397
|October 31, 2000 |
| 398
|January 10, 1996 |
| 399
| |
| 400
|August 31, 2011 |
| 401
|October 17, 2001 |
| 402
|September 6, 2012 |
| 403
|July 31, 2018 |
| 404
|January 4, 2016 |
| 405
|April 20, 2016 |
| 406
|Bow |December 21, 2018 |
| 407
|May 6, 2015 |
| 408
|Coös |December 9, 2015 |
| 409
|October 13, 2015 |
| 410
|July 22, 1999 |
| 412
|February 27, 1999 |
| 413
|June 13, 2000 |
| 414
|May 10, 1999 |
| 415
|May 10, 1999 |
| 416
|December 21, 2018 |
| 417
|April 14, 2015 |
| 418
|January 14, 2000 |
| 419
|July 22, 1999 |
| 420
|January 25, 1998 |
| 421
| |
| 422
| |
| 423
| |
| 424
| |
| 425
| |
| 426
| |
| 427
| |
| 428
| |
| 429
| |
| 430
| |
| 431
| |
| 432
| |
| 433
| |
| 434
| |
| 435
| |
| 436
| |
| 437
| |
| 438
|August 20, 2000 |
| 439
|January 14, 2000 |
| 440
|May 18, 1998 |
| 441
|October 13, 1999 |
| 442
|January 25, 1998 |
| 443
| |
| 444
| |
| 445
|January 10, 1996 |
| 446
| |
| 447
| |
| 448
| |
| 449
|Coös | |
| 450
|September 11, 2018 |
| 451
|April 8, 2020 |
| 452
|May 10, 1999 |
| 453
|October 12, 2020 |
| 454
|May 10, 1999 |
| 455
|January 25, 1998 |
| 456
| |
| 457
|November 27, 2020 |
| 458
|July 22, 1999 |
| 459
|October 13, 1999 |
| 460
|January 25, 1998 |
| 461
|July 6, 1997 |
| 462
|May 10, 1999 |
| 463
| |
| 464
| |
| 465
| |
| 466
|Coös | |
| 467
|July 4, 1995 |
| 468
|October 13, 1999 |
| 469
| |
| 470
|April 19, 2001 |
| 471
| |
| 472
| |
| 473
| |
| 474
| |
| 475
|January 14, 2000 |
| 476
| |
| 477
|February 27, 1999 |
| 478
| |
| 479
| |
| 480
|October 15, 1996 |
| 481
| |
| 482
|Coös | |
| 483
| |
| 484
|September 21, 2016 |
| 485
| |
| 486
|November 20, 1998 |
| 487
| |
| 488
|June 13, 2000 |
| 489
|October 13, 1999 |
| 490
|February 11, 1995 |
| 491
|July 1, 1996 |
| 492
| |
| 493
| |
| 494
| |
| 495
| |
| 496
| |
| 497
| |
| 498
|February 11, 1995 |
| 499
|May 18, 1998 |
| 500
|June 15, 2020 |
| 501
|June 13, 2000 |
| 502
|June 13, 2000 |
| 503
|Coös |November 20, 1998 |
| 504
|February 27, 1999 |
| 505
|October 9, 2002 |
| 506
|October 29, 2018 |
| 507
|July 28, 2015 |
| 508
|August 8, 2001 |
| 509
|September 24, 2001 |
| 510
|March 29, 2010 |
| 512
|May 10, 1999 |
| 513
|June 13, 2000 |
| 514
|January 21, 2021 |
| 515
|July 22, 1999 |
| 516
|May 10, 1999 |
| 517
|February 27, 1999 |
| 518
|July 22, 1999 |
| 519
|October 4, 2018 |
| 520
|July 1, 1996 |
| 521
|October 13, 1999 |
| 522
| |
| 523
| |
| 524
| |
| 525
| |
| 526
| |
| 527
| |
| 528
| |
| 529
| |
| 530
|February 22, 2002 |
| 531
|February 11, 1995 |
| 532
| |
| 533
| |
| 534
| |
| 535
| |
| 536
| |
| 537
|April 15, 1996 |
| 538
|Coös | |
| 539
| |
| 540
|August 21, 2001 |
| 541
|May 21, 2001 |
| 542
| |
| 543
| |
| 544
| |
| 545
|October 13, 1999 |
| 546
|January 14, 2000 |
| 547
| |
| 548
|July 1, 1996 |
| 549
|May 18, 1998 |
| 550
|November 18, 2021 |
| 551
| |
| 552
|January 25, 1998 |
| 553
|September 11, 1994 |
| 554
|January 25, 1998 |
| 556
|May 18, 1998 |
| 557
|May 18, 1998 |
| 558
| |
| 559
|April 1, 1997 |
| 560
|August 20, 2000 |
| 561
|September 11, 1994 |
| 562
|January 25, 1998 |
| 563
| |
| 564
| |
| 565
|August 14, 1998 |
| 566
|February 11, 1995 |
| 567
|May 18, 1998 |
| 568
|August 6, 2002 |
| 569
| |
| 570
|August 14, 1998 |
| 571
|April 1, 1997 |
| 572
|January 10, 1996 |
| 573
|August 14, 1998 |
| 574
|August 14, 1998 |
| 575
|August 14, 1998 |
| 576
|August 14, 1998 |
| 577
|September 11, 1994 |
| 578
|January 10, 1996 |
| 579
|July 6, 1997 |
| 580
|August 20, 2000 |
| 581
|August 20, 2000 |
| 582
|July 1, 1996 |
| 583
|May 18, 1998 |
| 584
|June 29, 2021 |
| 585
| |
| 586
|Coös | |
| 587
|January 25, 1998 |
| 588
| |
| 589
|January 14, 2000 |
| 590
|May 10, 1999 |
| 591
|October 31, 2000 |
| 592
|August 14, 1998 |
| 593
|June 26, 2003 |
| 594
| |
| 595
| |
| 596
| |
| 597
|Lyme |August 14, 1998 |
| 598
| |
| 599
| |
| 600
|May 29, 2020 |
| 601
|June 30, 2001 |
| 602
|December 4, 2020 |
| 604
|April 24, 2019 |
| 605
|December 12, 2016 |
| 606
|May 10, 1999 |
| 607
|August 13, 2020 |
| 608
|January 22, 2002 |
| 609
|August 20, 2000 |
| 610
|June 13, 2000 |
| 612
|October 13, 1999 |
| 613
|Coös |November 20, 1998 |
| 614
|November 20, 1998 |
| 615
|February 27, 1999 |
| 616
|February 27, 1999 |
| 617
|June 13, 2000 |
| 618
|August 14, 1998 |
| 620
|April 1, 1997 |
| 621
|January 10, 1996 |
| 622
| |
| 623
| |
| 624
| |
| 625
| |
| 626
| |
| 627
| |
| 628
| |
| 629
|July 6, 1997 |
| 630
|January 22, 2002 |
| 631
|Coös |February 22, 2002 |
| 632
| |
| 633
|May 21, 2001 |
| 634
| |
| 635
| |
| 636
|Coös | |
| 637
|January 25, 1998 |
| 638
|January 10, 1996 |
| 639
| |
| 640
| |
| 641
| |
| 642
| |
| 643
| |
| 644
| |
| 645
| |
| 646
| |
| 647
| |
| 648
| |
| 650
| |
| 651
|January 25, 1998 |
| 652
| |
| 653
|May 18, 1998 |
| 654
| |
| 655
|July 1, 1996 |
| 656
|April 15, 1996 |
| 657
|January 14, 2000 |
| 658
|May 10, 1999 |
| 659
| |
| 660
|February 22, 2002 |
| 661
|October 15, 1996 |
| 662
|January 25, 1998 |
| 663
|October 15, 1996 |
| 664
| |
| 665
|May 18, 1998 |
| 666
| |
| 667
|August 14, 1998 |
| 668
| |
| 669
| |
| 670
|October 31, 2000 |
| 671
|August 14, 1998 |
| 672
| |
| 673
| |
| 674
|November 20, 1998 |
| 675
|January 10, 1996 |
| 676
|May 10, 1999 |
| 677
|August 14, 1998 |
| 678
|August 14, 1998 |
| 679
| |
| 680
|April 23, 2004 |
| 681
|June 13, 2000 |
| 682
|February 27, 1999 |
| 683
|October 13, 1999 |
| 684
|Coös |May 18, 1998 |
| 685
|October 13, 1999 |
| 686
|September 12, 2002 |
| 687
|May 10, 1999 |
| 688
|February 24, 2021 |
| 689
|August 20, 2000 |
| 690
|August 14, 1998 |
| 692
| |
| 693
|August 20, 2000 |
| 694
|January 10, 1996 |
| 695
| |
| 696
|May 17, 2021 |
| 701
|October 22, 2009 |
| 702
|July 8, 2002 |
| 703
|August 18, 2004 |
| 704
|March 26, 2019 |
| 705
|November 17, 2009 |
| 706
|June 13, 2000 |
| 707
|July 28, 2004 |
| 708
|February 18, 2005 |
| 709
|August 17, 2004 |
| 710
|March 2, 2021 |
| 712
|November 20, 1998 |
| 714
|November 19, 2001 |
| 715
|October 13, 1999 |
| 716
|June 4, 2008 |
| 717
|January 14, 2000 |
| 718
|May 8, 2009 |
| 719
|May 10, 1999 |
| 721
|July 8, 2002 |
| 722
|May 14, 2008 |
| 723
|Coös |February 27, 1999 |
| 724
|January 14, 2000 |
| 725
|November 20, 1998 |
| 726
| |
| 727
|August 20, 2000 |
| 728
|May 18, 1998 |
| 729
|August 14, 1998 |
| 730
|August 14, 1998 |
| 731
|July 1, 1996 |
| 732
|January 25, 1998 |
| 733
|August 14, 1998 |
| 734
|August 14, 1998 |
| 735
| |
| 736
| |
| 737
|May 10, 1999 |
| 738
|August 20, 2000 |
| 739
|November 20, 1998 |
| 740
| |
| 741
|August 20, 2000 |
| 742
| |
| 743
| |
| 744
| |
| 745
| |
| 746
| |
| 747
| |
| 748
|June 20, 2003 |
| 749
| |
| 750
|July 6, 1997 |
| 751
|January 25, 1998 |
| 752
|Coös | |
| 753
| |
| 754
|Coös |May 10, 1999 |
| 755
| |
| 756
| |
| 757
|January 14, 2000 |
| 758
|October 31, 2000 |
| 759
|July 1, 1996 |
| 760
|May 20, 2002 |
| 761
|May 10, 1999 |
| 762
|April 15, 1996 |
| 763
| |
| 764
| |
| 765
|June 13, 2000 |
| 766
|November 20, 1998 |
| 767
| |
| 768
| |
| 769
|August 14, 1998 |
| 770
|February 11, 1995 |
| 771
| |
| 772
| |
| 773
|February 11, 1995 |
| 774
|Bow | |
| 775
|April 1, 1997 |
| 776
| |
| 777
|July 6, 1997 |
| 778
| |
| 779
|August 14, 1998 |
| 780
|November 20, 1998 |
| 781
|April 15, 1996 |
| 782
|May 18, 1998 |
| 783
| |
| 784
|August 14, 1998 |
| 785
|June 13, 2000 |
| 786
| |
| 787
| |
| 788
|Coös | |
| 789
|January 14, 2000 |
| 790
|October 25, 2002 |
| 791
| |
| 792
|May 10, 1999 |
| 793
|May 20, 2002 |
| 795
|Lyme | |
| 796
| |
| 797
|August 14, 1998 |
| 798
| |
| 799
|March 3, 2001 |
| 800
|December 9, 2019 |
| 801
|March 16, 2001 |
| 803
|October 20, 2016 |
| 808
|November 23, 2009 |
| 809
|March 13, 2007 |
| 810
|June 1, 2021 |
| 812
|June 13, 2000 |
| 813
|October 30, 2009 |
| 814
|July 30, 2010 |
| 815
|December 6, 2007 |
| 816
|May 10, 1999 |
| 817
|December 19, 2001 |
| 818
|July 8, 2002 |
| 819
|November 20, 1998 |
| 820
|March 10, 2008 |
| 821
|May 10, 1999 |
| 822
|August 20, 2000 |
| 823
| |
| 824
|January 25, 1998 |
| 825
|January 13, 2022 |
| 826
| |
| 827
| |
| 828
|January 22, 2002 |
| 829
|August 14, 1998 |
| 831
|December 14, 2004 |
| 832
|August 20, 2000 |
| 833
|October 5, 2004 |
| 834
|June 13, 2000 |
| 835
| |
| 836
|October 25, 2002 |
| 837
|Coös | |
| 838
| |
| 839
|October 13, 2006 |
| 840
|November 16, 2009 |
| 841
|October 31, 2000 |
| 842
|August 20, 2000 |
| 843
|May 10, 1999 |
| 845
|January 14, 2000 |
| 846
|Coös | |
| 847
| |
| 848
|July 1, 1996 |
| 850
| |
| 851
|October 13, 1999 |
| 852
|March 3, 2001 |
| 853
|May 10, 1999 |
| 854
|December 6, 2002 |
| 855
|October 30, 2009 |
| 856
|January 14, 2000 |
| 857
|April 21, 2022 |
| 858
|June 13, 2000 |
| 859
| |
| 860
|July 1, 1996 |
| 861
|August 14, 1998 |
| 862
|April 26, 2001 |
| 863
| |
| 864
|May 10, 1999 |
| 865
|February 27, 1999 |
| 866
|March 3, 2001 |
| 867
|February 27, 1999 |
| 868
| |
| 869
|Coös | |
| 870
|October 11, 1997 |
| 871
|November 20, 1998 |
| 872
|October 30, 2009 |
| 873
|August 14, 1998 |
| 874
|Bath |August 14, 1998 |
| 875
| |
| 876
| |
| 877
|November 17, 2009 |
| 878
| |
| 879
|May 18, 1998 |
| 880
| |
| 881
| |
| 882
| |
| 883
| |
| 884
| |
| 885
| |
| 886
| |
| 887
| |
| 888
| |
| 889
| |
| 890
| |
| 891
| |
| 892
|March 3, 2001 |
| 893
| |
| 894
| |
| 895
| |
| 896
|April 15, 1996 |
| 897
|July 4, 1995 |
| 898
| |
| 899
| |
| 900
|June 15, 2020 |
| 901
|February 26, 2016 |
| 902
|November 17, 2009 |
| 903
|October 13, 2005 |
| 904
|August 22, 2005 |
| 905
|September 20, 2006 |
| 906
|October 30, 2009 |
| 910
|August 20, 2000 |
| 912
| |
| 913
|June 13, 2000 |
| 915
|Coös |February 22, 2002 |
| 918
|April 19, 2002 |
| 921
|July 6, 2009 |
| 922
|Coös | |
| 923
|August 14, 1998 |
| 924
| |
| 925
|May 10, 1999 |
| 926
| |
| 927
| |
| 928
|June 13, 2000 |
| 929
| |
| 930
|February 27, 1999 |
| 931
|May 21, 2015 |
| 932
|August 20, 2008 |
| 933
|July 7, 2008 |
| 934
| |
| 935
|March 27, 2006 |
| 937
|June 6, 2008 |
| 938
| |
| 939
|January 10, 1996 |
| 941
|August 14, 1998 |
| 942
| |
| 943
|November 20, 1998 |
| 944
|December 19, 2001 |
| 945
|August 1, 2007 |
| 947
|May 10, 1999 |
| 948
|February 26, 2008 |
| 951
|Coös |November 20, 1998 |
| 952
|August 14, 1998 |
| 953
|August 20, 2000 |
| 957
|January 22, 2002 |
| 960
|January 22, 2008 |
| 961
|November 17, 2009 |
| 964
|Rye | |
| 965
|August 20, 2000 |
| 966
|February 22, 2002 |
| 967
|August 14, 1998 |
| 968
| |
| 969
|May 20, 2002 |
| 970
|March 22, 2006 |
| 971
|May 10, 1999 |
| 973
|May 20, 2002 |
| 974
|May 10, 1999 |
| 975
|November 16, 2009 |
| 977
|November 17, 2009 |
| 978
|March 16, 2001 |
| 986
|April 19, 2002 |
| 988
|October 17, 2001 |
| 989
| |
| 991
|February 22, 2002 |
| 992
|November 20, 1998 |
| 994
|May 10, 1999 |
| 995
|August 9, 2002 |
| 996
|August 9, 2002 |
| 997
|August 9, 2002 |
| 998
|July 8, 2002 |
| 999
|December 9, 2019 |
References
{{Reflist}}
External links
{{Area code footer|Map=NH}}
- [https://web.archive.org/web/20090409164906/http://www.areacodedownload.com/603/index.html List of exchanges from AreaCodeDownload.com, 603 Area Code]
- [http://www.nashuatelegraph.com/news/local-news/2010/12/06/603-can-stay-single-for-a-few-more-years/ December 2010 newspaper article about then-uncertain future of 603]
{{Area code box|State=NH
| This=area code 603
| N=819
| E=207
| W=802
| S1=MA | S2=ME | S3=QC | S4=VT}}
{{Area code list}}