There are 756 phone number prefixes within area code 603. Additionally, there are more than 4,100 phone numbers in this area code that have received at least one user report. The location of calls from area code 603 is New Hampshire, USA. Most numbers in this area code are in US Eastern time, where the time is currently 2:44:03 AM on February 5, 2025.
Choose a phone number from the list below to browse user reports for . You can also use the search box above to search for user reports about any phone number, or to file a report about any phone number.
| Prefix | City / State | Primary Telco |
|---|---|---|
| 603-501 | Portsmouth, NH | Paetec Communications, Inc. - Nh |
| 603-502 | Portsmouth, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-503 | Lancaster, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-504 | Claremont, NH | United States Cellular - Nh |
| 603-505 | Derry, NH | Bell Atlantic Mobile, Inc |
| 603-506 | Manchester, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-507 | Rochester, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-508 | Pelham, NH | Bell Atlantic Mobile, Inc |
| 603-509 | Rochester, NH | Ctc Communications Corp. - Nh |
| 603-510 | Meriden, NH | Comcast Ip Phone, Llc |
| 603-511 | New Hampshire | |
| 603-512 | Manchester, NH | Sprint Spectrum, L.p. |
| 603-513 | Concord, NH | Bell Atlantic Mobile, Inc |
| 603-514 | Nashua, NH | Bell Atlantic Mobile, Inc |
| 603-515 | Wolfeboro, NH | Consolidated Comm Of No. New England-nh |
| 603-516 | Dover, NH | Freedom Ring Communications, Llc |
| 603-517 | Merrimack, NH | American Messaging Services, Llc |
| 603-518 | Manchester, NH | At&t - Local |
| 603-519 | Exeter, NH | Bell Atlantic Mobile, Inc |
| 603-520 | Laconia, NH | Bell Atlantic Mobile, Inc |
| 603-521 | Nashua, NH | At&t - Local |
| 603-522 | Sanbornville, NH | Consolidated Comm Of No. New England-nh |
| 603-523 | Canaan, NH | Consolidated Comm Of No. New England-nh |
| 603-524 | Laconia, NH | Consolidated Comm Of No. New England-nh |
| 603-525 | Hancock, NH | Consolidated Comm Of No. New England-nh |
| 603-526 | New London, NH | Kearsarge Tel. Co. |
| 603-527 | Laconia, NH | Consolidated Comm Of No. New England-nh |
| 603-528 | Laconia, NH | Consolidated Comm Of No. New England-nh |
| 603-529 | Weare, NH | Granite State Tel., Inc. |
| 603-530 | Bristol, NH | Bell Atlantic Mobile, Inc |
| 603-531 | Portsmouth, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-532 | Jaffrey, NH | Consolidated Comm Of No. New England-nh |
| 603-533 | Merrimack, NH | United States Cellular - Nh |
| 603-534 | Dover, NH | Bell Atlantic Mobile, Inc |
| 603-535 | Plymouth, NH | Paetec Communications, Inc. - Nh |
| 603-536 | Plymouth, NH | Consolidated Comm Of No. New England-nh |
| 603-537 | Derry, NH | Consolidated Comm Of No. New England-nh |
| 603-538 | Pittsburg, NH | Consolidated Comm Of No. New England-nh |
| 603-539 | Center Ossipee, NH | Consolidated Comm Of No. New England-nh |
| 603-540 | Manchester, NH | Bell Atlantic Mobile, Inc |
| 603-541 | Manchester, NH | Consolidated Comm Of No. New England-nh |
| 603-542 | Claremont, NH | Consolidated Comm Of No. New England-nh |
| 603-543 | Claremont, NH | Consolidated Comm Of No. New England-nh |
| 603-544 | Melvin Village, NH | Merrimack Co. Telephone Co., Dba Contoocook Valley |
| 603-545 | Concord, NH | Lightship Telecom, Llc - Nh |
| 603-546 | Nashua, NH | Choice One Of New Hampshire, Inc. |
| 603-547 | Greenfield, NH | Consolidated Comm Of No. New England-nh |
| 603-548 | Derry, NH | Bell Atlantic Mobile, Inc |
| 603-549 | Derry, NH | Consolidated Comm Of No. New England-nh |
| 603-550 | Dover, NH | Telnyx Llc |
| 603-551 | Manchester, NH | Consolidated Comm Of No. New England-nh |
| 603-552 | Derry, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-553 | Derry, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-554 | Milford, NH | United States Cellular - Nh |
| 603-555 | New Hampshire | Multiple Ocn Listing |
| 603-556 | Laconia, NH | Level 3 Communications, Llc - Nh |
| 603-557 | Nashua, NH | Sprint Spectrum, L.p. |
| 603-558 | Claremont, NH | Bell Atlantic Mobile, Inc |
| 603-559 | Portsmouth, NH | Consolidated Comm Of No. New England-nh |
| 603-560 | Salem, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-561 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-562 | Peterborough, NH | United States Cellular - Nh |
| 603-563 | Dublin, NH | Consolidated Comm Of No. New England-nh |
| 603-564 | Manchester, NH | Consolidated Comm Of No. New England-nh |
| 603-565 | Penacook, NH | Level 3 Communications, Llc - Nh |
| 603-566 | Nashua, NH | Bell Atlantic Mobile, Inc |
| 603-567 | Peterborough, NH | Level 3 Communications, Llc - Nh |
| 603-568 | Concord, NH | Bell Atlantic Mobile, Inc |
| 603-569 | Wolfeboro, NH | Consolidated Comm Of No. New England-nh |
| 603-570 | Portsmouth, NH | Teleport Communications America, Llc - Nh |
| 603-571 | Derry, NH | New Cingular Wireless Pcs, Llc - Dc |
| 603-572 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-573 | Concord, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-574 | Alstead, NH | Level 3 Communications, Llc - Nh |
| 603-575 | Littleton, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-576 | Orford, NH | Level 3 Communications, Llc - Nh |
| 603-577 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-578 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-579 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-580 | Exeter, NH | Comcast Ip Phone, Llc |
| 603-581 | Laconia, NH | Choice One Of New Hampshire, Inc. |
| 603-582 | Merrimack, NH | United States Cellular - Nh |
| 603-583 | Exeter, NH | Level 3 Communications, Llc - Nh |
| 603-584 | Concord, NH | Omnipoint Miami E License, Llc |
| 603-585 | Fitzwilliam, NH | Consolidated Comm Of No. New England-nh |
| 603-586 | Jefferson, NH | Consolidated Comm Of No. New England-nh |
| 603-587 | Candia, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-588 | Antrim, NH | Merrimack Co. Telephone Co., Dba Contoocook Valley |
| 603-589 | Nashua, NH | Paetec Communications, Inc. - Nh |
| 603-590 | Durham, NH | Freedom Ring Communications, Llc |
| 603-591 | Manchester, NH | Sprint Spectrum, L.p. |
| 603-592 | Spofford, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-593 | Jaffrey, NH | Ctc Communications Corp. - Nh |
| 603-594 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-595 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-596 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-597 | Lyme, NH | Mcimetro Access Transmission Services Llc - Nh |
| 603-598 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-599 | Nashua, NH | Consolidated Comm Of No. New England-nh |
| 603-600 | Manchester, NH | Commio, Llc |
February 4, 2025