Phone numbers in New Haven, Connecticut
New Haven has 188 phone prefixes in area codes 203, 475.
Biggest holders: AT&T (local phone), Verizon Wireless, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 38%
- Local phone company 39%
- Internet / business phone carrier 19%
- Paging service 3%
- Phone company 1%
Every prefix in New Haven
Search the first six digits of a number in this list. If it's here, the number started in New Haven with the carrier shown. If it isn't, check the Connecticut page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 203-200 | Bandwidth | Internet / business phone carrier | 2008 |
| 203-201 | Spok | Paging service | – |
| 203-214 | AT&T Mobility | Mobile carrier | – |
| 203-215 | AT&T Mobility | Mobile carrier | – |
| 203-230 | AT&T (local phone) | Local phone company | – |
| 203-234 | AT&T (local phone) | Local phone company | – |
| 203-239 | AT&T (local phone) | Local phone company | – |
| 203-248 | AT&T (local phone) | Local phone company | – |
| 203-281 | AT&T (local phone) | Local phone company | – |
| 203-285 | Teleport Communications America | Internet / business phone carrier | – |
| 203-287 | AT&T (local phone) | Local phone company | – |
| 203-288 | AT&T (local phone) | Local phone company | – |
| 203-298 | Cablevision Lightpath | Internet / business phone carrier | – |
| 203-314 | Verizon Wireless | Mobile carrier | – |
| 203-361 | Level 3 (Lumen) | Internet / business phone carrier | 2010 |
| 203-370 | American Messaging Services | Paging service | – |
| 203-376 | Verizon Wireless | Mobile carrier | – |
| 203-387 | AT&T (local phone) | Local phone company | – |
| 203-389 | AT&T (local phone) | Local phone company | – |
| 203-390 | Teleport Communications America | Internet / business phone carrier | 2015 |
| 203-392 | AT&T (local phone) | Local phone company | – |
| 203-393 | AT&T (local phone) | Local phone company | – |
| 203-397 | AT&T (local phone) | Local phone company | – |
| 203-401 | AT&T (local phone) | Local phone company | – |
| 203-404 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 203-407 | AT&T (local phone) | Local phone company | – |
| 203-410 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-412 | American Messaging Services | Paging service | – |
| 203-415 | AT&T Mobility | Mobile carrier | 2001 |
| 203-430 | AT&T Mobility | Mobile carrier | – |
| 203-432 | Bandwidth | Internet / business phone carrier | – |
| 203-435 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-436 | AT&T (local phone) | Local phone company | – |
| 203-444 | AT&T Mobility | Mobile carrier | – |
| 203-464 | Verizon Wireless | Mobile carrier | – |
| 203-466 | AT&T (local phone) | Local phone company | – |
| 203-467 | AT&T (local phone) | Local phone company | – |
| 203-468 | AT&T (local phone) | Local phone company | – |
| 203-469 | AT&T (local phone) | Local phone company | – |
| 203-477 | Spok | Paging service | – |
| 203-479 | AT&T (local phone) | Local phone company | – |
| 203-492 | AT&T (local phone) | Local phone company | – |
| 203-494 | Verizon Wireless | Mobile carrier | – |
| 203-495 | AT&T (local phone) | Local phone company | – |
| 203-497 | AT&T (local phone) | Local phone company | – |
| 203-498 | AT&T (local phone) | Local phone company | – |
| 203-499 | AT&T (local phone) | Local phone company | – |
| 203-500 | AT&T Mobility | Mobile carrier | 2001 |
| 203-503 | AT&T (local phone) | Local phone company | – |
| 203-506 | AT&T Mobility | Mobile carrier | – |
| 203-507 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-508 | Windstream (PAETEC) | Internet / business phone carrier | 2005 |
| 203-530 | Verizon Wireless | Mobile carrier | – |
| 203-535 | Comcast | Internet / business phone carrier | – |
| 203-553 | AT&T (local phone) | Local phone company | – |
| 203-562 | AT&T (local phone) | Local phone company | – |
| 203-582 | AT&T (local phone) | Local phone company | – |
| 203-584 | Verizon Wireless | Mobile carrier | 2010 |
| 203-589 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-603 | AT&T (local phone) | Local phone company | – |
| 203-605 | Verizon Wireless | Mobile carrier | – |
| 203-606 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-619 | AT&T (local phone) | Local phone company | – |
| 203-623 | Verizon Wireless | Mobile carrier | – |
| 203-624 | AT&T (local phone) | Local phone company | – |
| 203-627 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-640 | AT&T Mobility | Mobile carrier | – |
| 203-641 | Verizon Wireless | Mobile carrier | – |
| 203-645 | AT&T Mobility | Mobile carrier | – |
| 203-654 | AT&T (local phone) | Local phone company | – |
| 203-657 | American Messaging Services | Paging service | – |
| 203-668 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-671 | Verizon Wireless | Mobile carrier | – |
| 203-672 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 203-675 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-676 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-680 | AT&T (local phone) | Local phone company | 2012 |
| 203-684 | MetroPCS (T-Mobile) | Mobile carrier | 2008 |
| 203-687 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 203-688 | AT&T (local phone) | Local phone company | – |
| 203-691 | AT&T (local phone) | Local phone company | – |
| 203-710 | AT&T Mobility | Mobile carrier | – |
| 203-737 | AT&T (local phone) | Local phone company | – |
| 203-745 | AT&T (local phone) | Local phone company | – |
| 203-747 | Teleport Communications America | Internet / business phone carrier | – |
| 203-752 | AT&T (local phone) | Local phone company | – |
| 203-764 | AT&T (local phone) | Local phone company | – |
| 203-765 | AT&T (local phone) | Local phone company | – |
| 203-766 | American Messaging Services | Paging service | – |
| 203-771 | AT&T (local phone) | Local phone company | – |
| 203-772 | AT&T (local phone) | Local phone company | – |
| 203-773 | AT&T (local phone) | Local phone company | – |
| 203-776 | AT&T (local phone) | Local phone company | – |
| 203-777 | AT&T (local phone) | Local phone company | – |
| 203-780 | Peerless Network Of Connecticut | Internet / business phone carrier | 2012 |
| 203-781 | AT&T (local phone) | Local phone company | – |
| 203-782 | AT&T (local phone) | Local phone company | – |
| 203-784 | AT&T (local phone) | Local phone company | – |
| 203-785 | AT&T (local phone) | Local phone company | – |
| 203-786 | AT&T (local phone) | Local phone company | – |
| 203-787 | AT&T (local phone) | Local phone company | – |
| 203-789 | AT&T (local phone) | Local phone company | – |
| 203-795 | AT&T (local phone) | Local phone company | – |
| 203-799 | AT&T (local phone) | Local phone company | – |
| 203-800 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 203-804 | AT&T Mobility | Mobile carrier | – |
| 203-809 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 203-812 | AT&T (local phone) | Local phone company | – |
| 203-815 | Verizon Wireless | Mobile carrier | – |
| 203-821 | AT&T (local phone) | Local phone company | – |
| 203-823 | Comcast | Internet / business phone carrier | – |
| 203-824 | AT&T Mobility | Mobile carrier | – |
| 203-833 | Verizon Wireless | Mobile carrier | 2015 |
| 203-836 | Verizon Wireless | Mobile carrier | 2011 |
| 203-843 | AT&T Mobility | Mobile carrier | – |
| 203-848 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 203-850 | MetroPCS (T-Mobile) | Mobile carrier | 2008 |
| 203-859 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 203-865 | AT&T (local phone) | Local phone company | – |
| 203-867 | AT&T (local phone) | Local phone company | – |
| 203-868 | AT&T (local phone) | Local phone company | – |
| 203-887 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-889 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 203-891 | AT&T (local phone) | Local phone company | – |
| 203-901 | T-Mobile (including Sprint) | Mobile carrier | – |
| 203-902 | Onvoy | Internet / business phone carrier | – |
| 203-903 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 203-907 | Windstream (PAETEC) | Internet / business phone carrier | – |
| 203-909 | Verizon Wireless | Mobile carrier | 2008 |
| 203-915 | Verizon Wireless | Mobile carrier | – |
| 203-927 | Verizon Wireless | Mobile carrier | – |
| 203-928 | AT&T (local phone) | Local phone company | – |
| 203-931 | AT&T (local phone) | Local phone company | – |
| 203-932 | AT&T (local phone) | Local phone company | – |
| 203-933 | AT&T (local phone) | Local phone company | – |
| 203-934 | AT&T (local phone) | Local phone company | – |
| 203-936 | AT&T (local phone) | Local phone company | 2008 |
| 203-937 | AT&T (local phone) | Local phone company | – |
| 203-946 | AT&T (local phone) | Local phone company | – |
| 203-974 | Teleport Communications America | Internet / business phone carrier | – |
| 203-980 | Verizon Wireless | Mobile carrier | 2002 |
| 203-985 | AT&T (local phone) | Local phone company | – |
| 203-988 | AT&T Mobility | Mobile carrier | – |
| 203-996 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 203-999 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 475-201 | MetroPCS (T-Mobile) | Mobile carrier | 2010 |
| 475-202 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 475-209 | AT&T (local phone) | Local phone company | 2014 |
| 475-220 | Windstream (PAETEC) | Internet / business phone carrier | 2015 |
| 475-224 | Verizon Wireless | Mobile carrier | 2015 |
| 475-227 | AT&T Mobility | Mobile carrier | 2011 |
| 475-230 | Teleport Communications America | Internet / business phone carrier | 2016 |
| 475-234 | Telnyx | Internet / business phone carrier | 2016 |
| 475-238 | Verizon Wireless | Mobile carrier | 2010 |
| 475-241 | MetroPCS (T-Mobile) | Mobile carrier | 2018 |
| 475-246 | AT&T (local phone) | Local phone company | 2014 |
| 475-247 | AT&T (local phone) | Local phone company | 2014 |
| 475-254 | Verizon Wireless | Mobile carrier | 2018 |
| 475-261 | Verizon Wireless | Mobile carrier | 2019 |
| 475-267 | AT&T Mobility | Mobile carrier | 2020 |
| 475-287 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 475-300 | Vonage America | Internet / business phone carrier | 2016 |
| 475-301 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 475-306 | Verizon Wireless | Mobile carrier | 2021 |
| 475-308 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 475-317 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 475-318 | Verizon Wireless | Mobile carrier | 2023 |
| 475-321 | Verizon Wireless | Mobile carrier | 2022 |
| 475-331 | Verizon Wireless | Mobile carrier | 2016 |
| 475-352 | Onvoy | Internet / business phone carrier | 2024 |
| 475-355 | Verizon Wireless | Mobile carrier | 2014 |
| 475-365 | Onvoy | Internet / business phone carrier | 2024 |
| 475-372 | Onvoy | Internet / business phone carrier | 2024 |
| 475-375 | Onvoy | Internet / business phone carrier | 2023 |
| 475-379 | Eon Telecom | Phone company | 2024 |
| 475-384 | Onvoy | Internet / business phone carrier | 2024 |
| 475-387 | AT&T Mobility | Mobile carrier | 2025 |
| 475-390 | AT&T Mobility | Mobile carrier | 2025 |
| 475-392 | Onvoy | Internet / business phone carrier | 2025 |
| 475-402 | Onvoy | Internet / business phone carrier | 2026 |
| 475-414 | Verizon Wireless | Mobile carrier | 2015 |
| 475-434 | MetroPCS (T-Mobile) | Mobile carrier | 2014 |
| 475-441 | Verizon Wireless | Mobile carrier | 2015 |
| 475-480 | Barr Tel USA | Phone company | 2022 |
| 475-655 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 475-766 | Fractel | Internet / business phone carrier | 2020 |
| 475-800 | Onvoy | Internet / business phone carrier | 2017 |
| 475-837 | TON80 Communications | Internet / business phone carrier | 2020 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.