Area Code 203
CT - 482 exchanges found
About Area Code 203
This page displays all phone exchanges (NXX codes) associated with area code 203. Click on any 6-digit prefix to see detailed information about phone numbers in that range.
203
Phone Exchanges (NXX)
| Prefix | Exchange (NXX) | Rate Center | Carrier | Action |
|---|---|---|---|---|
| 203-200 | 200 | NEW HAVEN | Unknown | |
| 203-202 | 202 | DARIEN | Unknown | |
| 203-203 | 203 | GREENWICH | Unknown | |
| 203-204 | 204 | GUILFORD | Unknown | |
| 203-205 | 205 | DANBURY | Unknown | |
| 203-207 | 207 | DANBURY | Unknown | |
| 203-208 | 208 | BRANFORD | Unknown | |
| 203-210 | 210 | WILTON | Unknown | |
| 203-212 | 212 | BRIDGEPORT | Unknown | |
| 203-216 | 216 | WESTPORT | Unknown | |
| 203-220 | 220 | TRUMBULL | Unknown | |
| 203-223 | 223 | STAMFORD | Unknown | |
| 203-224 | 224 | BRIDGEPORT | Unknown | |
| 203-228 | 228 | WATERBURY | Unknown | |
| 203-242 | 242 | HUNTINGTON | 4950-CABLEVISION LIGHTPATH, INC. - CT | |
| 203-242 | 242 | HUNTINGTON | Unknown | |
| 203-244 | 244 | RIDGEFIELD | Unknown | |
| 203-246 | 246 | NORWALK | Unknown | |
| 203-252 | 252 | STAMFORD | Unknown | |
| 203-262 | 262 | WOODBURY | Unknown | |
| 203-263 | 263 | WOODBURY | Unknown | |
| 203-266 | 266 | WOODBURY | Unknown | |
| 203-267 | 267 | WOODBURY | Unknown | |
| 203-273 | 273 | STAMFORD | Unknown | |
| 203-274 | 274 | STAMFORD | Unknown | |
| 203-275 | 275 | BRIDGEPORT | Unknown | |
| 203-276 | 276 | STAMFORD | Unknown | |
| 203-277 | 277 | OLDGRNWICH | Unknown | |
| 203-278 | 278 | ANSONIDRBY | Unknown | |
| 203-280 | 280 | DARIEN | Unknown | |
| 203-283 | 283 | MILFORD | Unknown | |
| 203-285 | 285 | NEW HAVEN | Unknown | |
| 203-286 | 286 | NORWALK | Unknown | |
| 203-290 | 290 | BRIDGEPORT | Unknown | |
| 203-291 | 291 | WESTPORT | Unknown | |
| 203-292 | 292 | FAIRFIELD | Unknown | |
| 203-293 | 293 | WESTPORT | Unknown | |
| 203-295 | 295 | NORWALK | Unknown | |
| 203-296 | 296 | BRIDGEPORT | Unknown | |
| 203-297 | 297 | DANBURY | Unknown | |
| 203-298 | 298 | NEW HAVEN | Unknown | |
| 203-299 | 299 | NORWALK | Unknown | |
| 203-300 | 300 | DANBURY | Unknown | |
| 203-301 | 301 | MILFORD | Unknown | |
| 203-302 | 302 | GREENWICH | Unknown | |
| 203-303 | 303 | WALLINGFD | Unknown | |
| 203-304 | 304 | NEWTOWN | Unknown | |
| 203-306 | 306 | MILFORD | Unknown | |
| 203-307 | 307 | FAIRFIELD | Unknown | |
| 203-308 | 308 | ANSONIDRBY | Unknown | |
| 203-309 | 309 | DARIEN | Unknown | |
| 203-310 | 310 | NEW CANAAN | Unknown | |
| 203-312 | 312 | DANBURY | Unknown | |
| 203-313 | 313 | DANBURY | Unknown | |
| 203-317 | 317 | MERIDEN | Unknown | |
| 203-318 | 318 | MADISON | Unknown | |
| 203-320 | 320 | DARIEN | Unknown | |
| 203-321 | 321 | STAMFORD | Unknown | |
| 203-326 | 326 | STAMFORD | Unknown | |
| 203-327 | 327 | STAMFORD | Unknown | |
| 203-331 | 331 | BRIDGEPORT | Unknown | |
| 203-338 | 338 | BRIDGEPORT | Unknown | |
| 203-339 | 339 | BRIDGEPORT | Unknown | |
| 203-340 | 340 | GREENWICH | Unknown | |
| 203-343 | 343 | ANSONIDRBY | Unknown | |
| 203-344 | 344 | OLDGRNWICH | Unknown | |
| 203-346 | 346 | WATERBURY | Unknown | |
| 203-347 | 347 | BYRAM | Unknown | |
| 203-349 | 349 | WESTPORT | Unknown | |
| 203-350 | 350 | MADISON | Unknown | |
| 203-356 | 356 | STAMFORD | Unknown | |
| 203-357 | 357 | STAMFORD | Unknown | |
| 203-358 | 358 | STAMFORD | Unknown | |
| 203-360 | 360 | BRIDGEPORT | Unknown | |
| 203-361 | 361 | NEW HAVEN | Unknown | |
| 203-362 | 362 | BRIDGEPORT | Unknown | |
| 203-363 | 363 | STAMFORD | Unknown | |
| 203-364 | 364 | NEWTOWN | Unknown | |
| 203-368 | 368 | BRIDGEPORT | Unknown | |
| 203-369 | 369 | OLDGRNWICH | Unknown | |
| 203-379 | 379 | MERIDEN | Unknown | |
| 203-382 | 382 | BRIDGEPORT | Unknown | |
| 203-383 | 383 | BRIDGEPORT | Unknown | |
| 203-385 | 385 | BRIDGEPORT | Unknown | |
| 203-388 | 388 | STAMFORD | Unknown | |
| 203-390 | 390 | NEW HAVEN | Unknown | |
| 203-391 | 391 | STAMFORD | Unknown | |
| 203-392 | 392 | NEW HAVEN | Unknown | |
| 203-393 | 393 | NEW HAVEN | Unknown | |
| 203-394 | 394 | BRIDGEPORT | Unknown | |
| 203-395 | 395 | BRIDGEPORT | Unknown | |
| 203-397 | 397 | NEW HAVEN | Unknown | |
| 203-399 | 399 | STAMFORD | Unknown | |
| 203-400 | 400 | TRUMBULL | Unknown | |
| 203-401 | 401 | NEW HAVEN | Unknown | |
| 203-402 | 402 | HUNTINGTON | Unknown | |
| 203-403 | 403 | RIDGEFIELD | Unknown | |
| 203-404 | 404 | NEW HAVEN | Unknown | |
| 203-405 | 405 | WOODBURY | Unknown | |
| 203-406 | 406 | STAMFORD | Unknown | |
| 203-407 | 407 | NEW HAVEN | Unknown | |
| 203-408 | 408 | REDDING | Unknown | |
| 203-409 | 409 | OLDGRNWICH | 7143-TELEPORT COMMUNICATIONS AMERICA, LLC - CT | |
| 203-409 | 409 | OLDGRNWICH | Unknown | |
| 203-410 | 410 | NEW HAVEN | Unknown | |
| 203-416 | 416 | BRIDGEPORT | Unknown | |
| 203-418 | 418 | FAIRFIELD | Unknown | |
| 203-419 | 419 | WATERBURY | Unknown | |
| 203-421 | 421 | MADISON | Unknown | |
| 203-422 | 422 | GREENWICH | Unknown | |
| 203-423 | 423 | WILTON | Unknown | |
| 203-424 | 424 | DARIEN | Unknown | |
| 203-427 | 427 | MERIDEN | Unknown | |
| 203-428 | 428 | STAMFORD | Unknown | |
| 203-429 | 429 | WESTPORT | Unknown | |
| 203-433 | 433 | BRANFORD | Unknown | |
| 203-437 | 437 | WATERBURY | Unknown | |
| 203-439 | 439 | CHESHIRE | Unknown | |
| 203-440 | 440 | MERIDEN | Unknown | |
| 203-441 | 441 | WOLCOTT | Unknown | |
| 203-442 | 442 | NEW CANAAN | Unknown | |
| 203-443 | 443 | MERIDEN | Unknown | |
| 203-445 | 445 | TRUMBULL | Unknown | |
| 203-446 | 446 | ANSONIDRBY | Unknown | |
| 203-447 | 447 | HUNTINGTON | Unknown | |
| 203-448 | 448 | DANBURY | Unknown | |
| 203-449 | 449 | BRIDGEPORT | Unknown | |
| 203-450 | 450 | BRIDGEPORT | Unknown | |
| 203-455 | 455 | BRIDGEPORT | Unknown | |
| 203-456 | 456 | DANBURY | Unknown | |
| 203-457 | 457 | GUILFORD | Unknown | |
| 203-460 | 460 | DANBURY | Unknown | |
| 203-461 | 461 | STAMFORD | Unknown | |
| 203-463 | 463 | SEYMOUR | Unknown | |
| 203-465 | 465 | WATERBURY | Unknown | |
| 203-466 | 466 | NEW HAVEN | Unknown | |
| 203-479 | 479 | NEW HAVEN | Unknown | |
| 203-480 | 480 | FAIRFIELD | Unknown | |
| 203-482 | 482 | DANBURY | Unknown | |
| 203-484 | 484 | BRANFORD | Unknown | |
| 203-485 | 485 | GREENWICH | Unknown | |
| 203-486 | 486 | WOODBURY | Unknown | |
| 203-487 | 487 | STAMFORD | Unknown | |
| 203-489 | 489 | GREENWICH | Unknown | |
| 203-490 | 490 | NAUGATUCK | Unknown | |
| 203-491 | 491 | NEWTOWN | Unknown | |
| 203-492 | 492 | NEW HAVEN | Unknown | |
| 203-493 | 493 | GEORGETOWN | Unknown | |
| 203-496 | 496 | GREENWICH | Unknown | |
| 203-497 | 497 | NEW HAVEN | Unknown | |
| 203-499 | 499 | NEW HAVEN | Unknown | |
| 203-501 | 501 | DANBURY | Unknown | |
| 203-502 | 502 | BRIDGEPORT | Unknown | |
| 203-503 | 503 | NEW HAVEN | Unknown | |
| 203-504 | 504 | STAMFORD | Unknown | |
| 203-505 | 505 | NORWALK | Unknown | |
| 203-507 | 507 | NEW HAVEN | Unknown | |
| 203-508 | 508 | NEW HAVEN | Unknown | |
| 203-509 | 509 | WATERBURY | Unknown | |
| 203-510 | 510 | WATERBURY | Unknown | |
| 203-513 | 513 | HUNTINGTON | Unknown | |
| 203-514 | 514 | MERIDEN | Unknown | |
| 203-515 | 515 | NORWALK | Unknown | |
| 203-516 | 516 | ANSONIDRBY | 4800-LEVEL 3 COMMUNICATIONS, LLC - CT | |
| 203-516 | 516 | ANSONIDRBY | Unknown | |
| 203-517 | 517 | STAMFORD | Unknown | |
| 203-518 | 518 | WATERBURY | Unknown | |
| 203-519 | 519 | WATERBURY | Unknown | |
| 203-522 | 522 | BRIDGEPORT | Unknown | |
| 203-523 | 523 | NORWALK | Unknown | |
| 203-524 | 524 | STAMFORD | Unknown | |
| 203-526 | 526 | BRIDGEPORT | Unknown | |
| 203-527 | 527 | WATERBURY | Unknown | |
| 203-528 | 528 | WATERBURY | Unknown | |
| 203-529 | 529 | WILTON | 7421-AT&T - LOCAL | |
| 203-529 | 529 | WILTON | Unknown | |
| 203-532 | 532 | BYRAM | Unknown | |
| 203-533 | 533 | GUILFORD | Unknown | |
| 203-534 | 534 | BRIDGEPORT | Unknown | |
| 203-535 | 535 | NEW HAVEN | Unknown | |
| 203-537 | 537 | MERIDEN | Unknown | |
| 203-538 | 538 | HUNTINGTON | Unknown | |
| 203-539 | 539 | STAMFORD | Unknown | |
| 203-540 | 540 | BRIDGEPORT | Unknown | |
| 203-541 | 541 | STAMFORD | Unknown | |
| 203-542 | 542 | GREENWICH | Unknown | |
| 203-544 | 544 | GEORGETOWN | Unknown | |
| 203-545 | 545 | BRIDGEPORT | Unknown | |
| 203-546 | 546 | DANBURY | Unknown | |
| 203-548 | 548 | STAMFORD | Unknown | |
| 203-549 | 549 | BRIDGEPORT | Unknown | |
| 203-551 | 551 | BRIDGEPORT | Unknown | |
| 203-552 | 552 | BYRAM | Unknown | |
| 203-553 | 553 | NEW HAVEN | Unknown | |
| 203-557 | 557 | WESTPORT | Unknown | |
| 203-559 | 559 | DARIEN | Unknown | |
| 203-563 | 563 | WILTON | Unknown | |
| 203-564 | 564 | STAMFORD | Unknown | |
| 203-565 | 565 | WATERBURY | Unknown | |
| 203-566 | 566 | STAMFORD | Unknown | |
| 203-567 | 567 | HUNTINGTON | Unknown | |
| 203-568 | 568 | WATERBURY | Unknown | |
| 203-571 | 571 | WESTPORT | 7421-AT&T - LOCAL | |
| 203-571 | 571 | WESTPORT | Unknown | |
| 203-572 | 572 | BRIDGEPORT | Unknown | |
| 203-577 | 577 | WATERBURY | Unknown | |
| 203-578 | 578 | WATERBURY | Unknown | |
| 203-580 | 580 | BYRAM | Unknown | |
| 203-581 | 581 | BRIDGEPORT | Unknown | |
| 203-583 | 583 | BRIDGEPORT | Unknown | |
| 203-584 | 584 | NEW HAVEN | Unknown | |
| 203-585 | 585 | STAMFORD | Unknown | |
| 203-586 | 586 | WOODBURY | Unknown | |
| 203-587 | 587 | GEORGETOWN | Unknown | |
| 203-589 | 589 | NEW HAVEN | Unknown | |
| 203-590 | 590 | TRUMBULL | Unknown | |
| 203-594 | 594 | NEW CANAAN | Unknown | |
| 203-595 | 595 | STAMFORD | Unknown | |
| 203-597 | 597 | WATERBURY | Unknown | |
| 203-598 | 598 | WATERBURY | Unknown | |
| 203-599 | 599 | MERIDEN | Unknown | |
| 203-600 | 600 | MERIDEN | Unknown | |
| 203-601 | 601 | TRUMBULL | Unknown | |
| 203-602 | 602 | STAMFORD | Unknown | |
| 203-604 | 604 | NORWALK | Unknown | |
| 203-607 | 607 | STAMFORD | Unknown | |
| 203-608 | 608 | MERIDEN | Unknown | |
| 203-609 | 609 | STAMFORD | Unknown | |
| 203-610 | 610 | BRIDGEPORT | Unknown | |
| 203-612 | 612 | BRIDGEPORT | Unknown | |
| 203-613 | 613 | NORWALK | Unknown | |
| 203-614 | 614 | STAMFORD | Unknown | |
| 203-615 | 615 | BRIDGEPORT | Unknown | |
| 203-616 | 616 | DANBURY | 4800-LEVEL 3 COMMUNICATIONS, LLC - CT | |
| 203-616 | 616 | DANBURY | Unknown | |
| 203-617 | 617 | DANBURY | Unknown | |
| 203-619 | 619 | NEW HAVEN | Unknown | |
| 203-620 | 620 | DARIEN | Unknown | |
| 203-621 | 621 | DARIEN | Unknown | |
| 203-625 | 625 | GREENWICH | Unknown | |
| 203-626 | 626 | WALLINGFD | Unknown | |
| 203-627 | 627 | NEW HAVEN | Unknown | |
| 203-628 | 628 | DANBURY | Unknown | |
| 203-632 | 632 | NAUGATUCK | Unknown | |
| 203-633 | 633 | WOLCOTT | Unknown | |
| 203-635 | 635 | WESTPORT | Unknown | |
| 203-636 | 636 | DARIEN | Unknown | |
| 203-638 | 638 | TRUMBULL | Unknown | |
| 203-642 | 642 | NORWALK | Unknown | |
| 203-643 | 643 | BRANFORD | Unknown | |
| 203-644 | 644 | NORWALK | Unknown | |
| 203-646 | 646 | BRANFORD | Unknown | |
| 203-648 | 648 | DANBURY | Unknown | |
| 203-649 | 649 | CHESHIRE | Unknown | |
| 203-650 | 650 | BRIDGEPORT | Unknown | |
| 203-651 | 651 | CHESHIRE | Unknown | |
| 203-652 | 652 | NEW CANAAN | Unknown | |
| 203-653 | 653 | STAMFORD | Unknown | |
| 203-654 | 654 | NEW HAVEN | Unknown | |
| 203-658 | 658 | STAMFORD | Unknown | |
| 203-659 | 659 | FAIRFIELD | Unknown | |
| 203-660 | 660 | BYRAM | 639C-ONVOY, LLC - CT | |
| 203-660 | 660 | BYRAM | Unknown | |
| 203-663 | 663 | NORWALK | Unknown | |
| 203-664 | 664 | REDDING | 4950-CABLEVISION LIGHTPATH, INC. - CT | |
| 203-664 | 664 | REDDING | Unknown | |
| 203-665 | 665 | WILTON | Unknown | |
| 203-666 | 666 | BRIDGEPORT | Unknown | |
| 203-667 | 667 | STAMFORD | Unknown | |
| 203-668 | 668 | NEW HAVEN | Unknown | |
| 203-669 | 669 | DARIEN | Unknown | |
| 203-670 | 670 | FAIRFIELD | Unknown | |
| 203-673 | 673 | BRIDGEPORT | Unknown | |
| 203-674 | 674 | STAMFORD | Unknown | |
| 203-675 | 675 | NEW HAVEN | Unknown | |
| 203-676 | 676 | NEW HAVEN | Unknown | |
| 203-677 | 677 | WALLINGFD | Unknown | |
| 203-678 | 678 | WALLINGFD | Unknown | |
| 203-679 | 679 | WALLINGFD | Unknown | |
| 203-680 | 680 | NEW HAVEN | Unknown | |
| 203-681 | 681 | BYRAM | Unknown | |
| 203-682 | 682 | WESTPORT | Unknown | |
| 203-683 | 683 | BRIDGEPORT | Unknown | |
| 203-684 | 684 | NEW HAVEN | Unknown | |
| 203-687 | 687 | NEW HAVEN | Unknown | |
| 203-689 | 689 | GUILFORD | Unknown | |
| 203-690 | 690 | BRIDGEPORT | Unknown | |
| 203-691 | 691 | NEW HAVEN | Unknown | |
| 203-692 | 692 | FAIRFIELD | 4800-LEVEL 3 COMMUNICATIONS, LLC - CT | |
| 203-692 | 692 | FAIRFIELD | Unknown | |
| 203-693 | 693 | MILFORD | Unknown | |
| 203-694 | 694 | MERIDEN | Unknown | |
| 203-695 | 695 | WATERBURY | Unknown | |
| 203-697 | 697 | WALLINGFD | Unknown | |
| 203-698 | 698 | OLDGRNWICH | Unknown | |
| 203-699 | 699 | CHESHIRE | Unknown | |
| 203-701 | 701 | MILFORD | Unknown | |
| 203-702 | 702 | DANBURY | Unknown | |
| 203-703 | 703 | STAMFORD | Unknown | |
| 203-704 | 704 | WOLCOTT | Unknown | |
| 203-705 | 705 | STAMFORD | Unknown | |
| 203-706 | 706 | WATERBURY | Unknown | |
| 203-707 | 707 | WATERBURY | Unknown | |
| 203-708 | 708 | STAMFORD | Unknown | |
| 203-709 | 709 | WATERBURY | Unknown | |
| 203-712 | 712 | HUNTINGTON | Unknown | |
| 203-713 | 713 | MILFORD | Unknown | |
| 203-714 | 714 | NAUGATUCK | Unknown | |
| 203-715 | 715 | MERIDEN | Unknown | |
| 203-716 | 716 | NEW CANAAN | 4800-LEVEL 3 COMMUNICATIONS, LLC - CT | |
| 203-716 | 716 | NEW CANAAN | Unknown | |
| 203-717 | 717 | GREENWICH | Unknown | |
| 203-718 | 718 | CHESHIRE | Unknown | |
| 203-720 | 720 | NAUGATUCK | Unknown | |
| 203-721 | 721 | WATERBURY | Unknown | |
| 203-723 | 723 | NAUGATUCK | Unknown | |
| 203-724 | 724 | STAMFORD | Unknown | |
| 203-725 | 725 | WATERBURY | Unknown | |
| 203-726 | 726 | BRIDGEPORT | Unknown | |
| 203-727 | 727 | BRIDGEPORT | Unknown | |
| 203-728 | 728 | STAMFORD | Unknown | |
| 203-731 | 731 | DANBURY | Unknown | |
| 203-736 | 736 | ANSONIDRBY | Unknown | |
| 203-737 | 737 | NEW HAVEN | Unknown | |
| 203-738 | 738 | GUILFORD | Unknown | |
| 203-739 | 739 | DANBURY | Unknown | |
| 203-741 | 741 | WALLINGFD | Unknown | |
| 203-742 | 742 | GREENWICH | Unknown | |
| 203-744 | 744 | DANBURY | Unknown | |
| 203-745 | 745 | NEW HAVEN | Unknown | |
| 203-747 | 747 | NEW HAVEN | Unknown | |
| 203-751 | 751 | ANSONIDRBY | Unknown | |
| 203-752 | 752 | NEW HAVEN | Unknown | |
| 203-759 | 759 | WATERBURY | Unknown | |
| 203-760 | 760 | BRIDGEPORT | Unknown | |
| 203-762 | 762 | WILTON | Unknown | |
| 203-763 | 763 | FAIRFIELD | Unknown | |
| 203-764 | 764 | NEW HAVEN | Unknown | |
| 203-769 | 769 | GREENWICH | Unknown | |
| 203-772 | 772 | NEW HAVEN | Unknown | |
| 203-774 | 774 | WALLINGFD | Unknown | |
| 203-779 | 779 | MADISON | Unknown | |
| 203-780 | 780 | NEW HAVEN | Unknown | |
| 203-781 | 781 | NEW HAVEN | Unknown | |
| 203-787 | 787 | NEW HAVEN | Unknown | |
| 203-793 | 793 | WALLINGFD | Unknown | |
| 203-794 | 794 | DANBURY | Unknown | |
| 203-800 | 800 | NEW HAVEN | Unknown | |
| 203-801 | 801 | NEW CANAAN | Unknown | |
| 203-802 | 802 | WATERBURY | Unknown | |
| 203-803 | 803 | NORWALK | Unknown | |
| 203-805 | 805 | WATERBURY | Unknown | |
| 203-806 | 806 | CHESHIRE | Unknown | |
| 203-807 | 807 | NORWALK | Unknown | |
| 203-808 | 808 | WATERBURY | Unknown | |
| 203-809 | 809 | NEW HAVEN | Unknown | |
| 203-810 | 810 | NORWALK | Unknown | |
| 203-812 | 812 | NEW HAVEN | Unknown | |
| 203-813 | 813 | BYRAM | Unknown | |
| 203-814 | 814 | BRIDGEPORT | Unknown | |
| 203-815 | 815 | NEW HAVEN | Unknown | |
| 203-816 | 816 | TRUMBULL | Unknown | |
| 203-817 | 817 | STAMFORD | Unknown | |
| 203-818 | 818 | NORWALK | Unknown | |
| 203-819 | 819 | WATERBURY | Unknown | |
| 203-820 | 820 | NORWALK | Unknown | |
| 203-821 | 821 | NEW HAVEN | Unknown | |
| 203-822 | 822 | NORWALK | Unknown | |
| 203-823 | 823 | NEW HAVEN | Unknown | |
| 203-826 | 826 | DANBURY | Unknown | |
| 203-827 | 827 | OLDGRNWICH | Unknown | |
| 203-828 | 828 | SEYMOUR | 4800-LEVEL 3 COMMUNICATIONS, LLC - CT | |
| 203-828 | 828 | SEYMOUR | Unknown | |
| 203-829 | 829 | NORWALK | Unknown | |
| 203-830 | 830 | DANBURY | Unknown | |
| 203-832 | 832 | STAMFORD | Unknown | |
| 203-833 | 833 | NEW HAVEN | Unknown | |
| 203-836 | 836 | NEW HAVEN | Unknown | |
| 203-837 | 837 | DANBURY | Unknown | |
| 203-841 | 841 | WATERBURY | Unknown | |
| 203-842 | 842 | NORWALK | Unknown | |
| 203-843 | 843 | NEW HAVEN | Unknown | |
| 203-844 | 844 | FAIRFIELD | Unknown | |
| 203-848 | 848 | NEW HAVEN | Unknown | |
| 203-850 | 850 | NEW HAVEN | Unknown | |
| 203-851 | 851 | NORWALK | Unknown | |
| 203-857 | 857 | NORWALK | Unknown | |
| 203-859 | 859 | NEW HAVEN | Unknown | |
| 203-864 | 864 | BRIDGEPORT | Unknown | |
| 203-868 | 868 | NEW HAVEN | Unknown | |
| 203-870 | 870 | BRIDGEPORT | Unknown | |
| 203-871 | 871 | BRANFORD | Unknown | |
| 203-872 | 872 | CHESHIRE | Unknown | |
| 203-873 | 873 | BRIDGEPORT | Unknown | |
| 203-875 | 875 | DARIEN | Unknown | |
| 203-880 | 880 | TRUMBULL | Unknown | |
| 203-881 | 881 | SEYMOUR | Unknown | |
| 203-883 | 883 | STAMFORD | Unknown | |
| 203-884 | 884 | GUILFORD | 639C-ONVOY, LLC - CT | |
| 203-884 | 884 | GUILFORD | Unknown | |
| 203-885 | 885 | DANBURY | Unknown | |
| 203-886 | 886 | MERIDEN | Unknown | |
| 203-887 | 887 | NEW HAVEN | Unknown | |
| 203-889 | 889 | NEW HAVEN | Unknown | |
| 203-890 | 890 | STAMFORD | Unknown | |
| 203-891 | 891 | NEW HAVEN | Unknown | |
| 203-892 | 892 | ANSONIDRBY | Unknown | |
| 203-893 | 893 | ANSONIDRBY | Unknown | |
| 203-894 | 894 | RIDGEFIELD | Unknown | |
| 203-896 | 896 | MADISON | Unknown | |
| 203-897 | 897 | STAMFORD | Unknown | |
| 203-898 | 898 | DARIEN | Unknown | |
| 203-900 | 900 | GREENWICH | Unknown | |
| 203-901 | 901 | NEW HAVEN | Unknown | |
| 203-903 | 903 | NEW HAVEN | Unknown | |
| 203-904 | 904 | NORWALK | Unknown | |
| 203-905 | 905 | STAMFORD | Unknown | |
| 203-906 | 906 | ANSONIDRBY | Unknown | |
| 203-907 | 907 | NEW HAVEN | Unknown | |
| 203-908 | 908 | BRIDGEPORT | Unknown | |
| 203-909 | 909 | NEW HAVEN | Unknown | |
| 203-914 | 914 | STAMFORD | Unknown | |
| 203-916 | 916 | BRIDGEPORT | Unknown | |
| 203-917 | 917 | DANBURY | Unknown | |
| 203-919 | 919 | NORWALK | Unknown | |
| 203-920 | 920 | NEW CANAAN | Unknown | |
| 203-921 | 921 | STAMFORD | Unknown | |
| 203-922 | 922 | HUNTINGTON | Unknown | |
| 203-923 | 923 | BRIDGEPORT | Unknown | |
| 203-927 | 927 | NEW HAVEN | Unknown | |
| 203-928 | 928 | NEW HAVEN | Unknown | |
| 203-930 | 930 | GREENWICH | Unknown | |
| 203-931 | 931 | NEW HAVEN | Unknown | |
| 203-935 | 935 | MERIDEN | 4800-LEVEL 3 COMMUNICATIONS, LLC - CT | |
| 203-935 | 935 | MERIDEN | Unknown | |
| 203-936 | 936 | NEW HAVEN | Unknown | |
| 203-937 | 937 | NEW HAVEN | Unknown | |
| 203-939 | 939 | NORWALK | Unknown | |
| 203-940 | 940 | STAMFORD | Unknown | |
| 203-941 | 941 | SEYMOUR | Unknown | |
| 203-942 | 942 | DANBURY | Unknown | |
| 203-943 | 943 | NORWALK | Unknown | |
| 203-945 | 945 | NORWALK | Unknown | |
| 203-947 | 947 | DANBURY | Unknown | |
| 203-948 | 948 | DANBURY | Unknown | |
| 203-951 | 951 | MILFORD | Unknown | |
| 203-952 | 952 | NORWALK | Unknown | |
| 203-953 | 953 | BRIDGEPORT | Unknown | |
| 203-954 | 954 | ANSONIDRBY | Unknown | |
| 203-955 | 955 | FAIRFIELD | Unknown | |
| 203-956 | 956 | NORWALK | Unknown | |
| 203-957 | 957 | NORWALK | Unknown | |
| 203-960 | 960 | STAMFORD | Unknown | |
| 203-961 | 961 | STAMFORD | Unknown | |
| 203-962 | 962 | STAMFORD | Unknown | |
| 203-963 | 963 | NORWALK | Unknown | |
| 203-964 | 964 | STAMFORD | Unknown | |
| 203-965 | 965 | STAMFORD | Unknown | |
| 203-968 | 968 | STAMFORD | Unknown | |
| 203-969 | 969 | STAMFORD | Unknown | |
| 203-970 | 970 | NORWALK | Unknown | |
| 203-971 | 971 | GREENWICH | Unknown | |
| 203-973 | 973 | STAMFORD | Unknown | |
| 203-974 | 974 | NEW HAVEN | Unknown | |
| 203-978 | 978 | STAMFORD | Unknown | |
| 203-980 | 980 | NEW HAVEN | Unknown | |
| 203-981 | 981 | NORWALK | Unknown | |
| 203-982 | 982 | WATERBURY | Unknown | |
| 203-983 | 983 | GREENWICH | Unknown | |
| 203-985 | 985 | NEW HAVEN | Unknown | |
| 203-986 | 986 | OLDGRNWICH | Unknown | |
| 203-987 | 987 | GREENWICH | Unknown | |
| 203-989 | 989 | STAMFORD | Unknown | |
| 203-990 | 990 | OLDGRNWICH | Unknown | |
| 203-992 | 992 | GREENWICH | Unknown | |
| 203-993 | 993 | BRIDGEPORT | Unknown | |
| 203-994 | 994 | DANBURY | Unknown | |
| 203-995 | 995 | BRIDGEPORT | Unknown | |
| 203-996 | 996 | NEW HAVEN | Unknown | |
| 203-997 | 997 | ANSONIDRBY | Unknown | |
| 203-998 | 998 | STAMFORD | Unknown | |
| 203-999 | 999 | NEW HAVEN | Unknown |
Quick Facts
- Area Code 203
- State CT
- Exchanges 482