Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
NEW HAVEN prefixes in area code 203
NANPA records 145 assigned NXX blocks to rate center NEW HAVEN in area code 203, 18.5% of the 784 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 17 holders hold those blocks, the largest being SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (69), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (17), OMNIPOINT COMMUNICATIONS, INC. - CT (15). The earliest assignment on record here is 2001-04-12 and the most recent 2015-11-10. 73 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area codes 260, 304, 475, 502 – overlay codes cover the same geography, so a rate center is served by all of them.
145 assigned blocks – 18.5% of 203
17 holders of record
73 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 203-200 | Bandwidth BANDWIDTH.COM CLEC, LLC - CT | 2008-08-14 | yes | yes |
| 203-201 | Spok SPOK, INC. | – | no | yes |
| 203-214 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-215 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-230 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-234 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-239 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-248 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-281 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-285 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | – | yes | yes |
| 203-287 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-288 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-298 | Altice CABLEVISION LIGHTPATH, INC. - CT | – | yes | yes |
| 203-314 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-361 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CT | 2010-12-16 | yes | yes |
| 203-370 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 203-376 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-387 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-389 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-390 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 2015-11-10 | yes | yes |
| 203-392 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-393 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-397 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-401 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-404 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CT | – | yes | yes |
| 203-407 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-410 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | yes | yes |
| 203-412 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 203-415 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2001-04-12 | no | yes |
| 203-430 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-432 | Bandwidth BANDWIDTH.COM CLEC, LLC - CT | – | no | yes |
| 203-435 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | no | yes |
| 203-436 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-444 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-464 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-466 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-467 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-468 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-469 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-477 | Spok SPOK, INC. | – | no | yes |
| 203-479 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-492 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-494 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-495 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-497 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-498 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-499 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-500 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2001-10-25 | no | yes |
| 203-503 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-506 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-507 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | yes | yes |
| 203-508 | Windstream PAETEC ITEL, LLC | 2005-02-03 | yes | yes |
| 203-530 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-535 | Comcast COMCAST IP PHONE, LLC | – | yes | yes |
| 203-553 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-562 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-582 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-584 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2010-07-09 | yes | yes |
| 203-589 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | yes | yes |
| 203-603 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-605 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-606 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | no | yes |
| 203-619 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-623 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-624 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-627 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | yes | yes |
| 203-640 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-641 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-645 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-654 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-657 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 203-668 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | yes | yes |
| 203-671 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-672 | Windstream PAETEC ITEL, LLC | – | no | yes |
| 203-675 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | yes | yes |
| 203-676 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | yes | yes |
| 203-680 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | 2012-10-31 | yes | yes |
| 203-684 | T-Mobile METROPCS, INC. | 2008-10-03 | yes | yes |
| 203-687 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CT | – | yes | yes |
| 203-688 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-691 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-710 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-737 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-745 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-747 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | – | yes | yes |
| 203-752 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-764 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-765 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-766 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 203-771 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-772 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-773 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-776 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-777 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-780 | Peerless PEERLESS NETWORK OF CONNECTICUT, LLC - CT | 2012-10-02 | yes | yes |
| 203-781 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-782 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-784 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-785 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-786 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-787 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-789 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-795 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-799 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-800 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | 2011-03-10 | yes | yes |
| 203-804 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-809 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | 2002-11-04 | yes | yes |
| 203-812 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-815 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | yes | yes |
| 203-821 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-823 | Comcast COMCAST IP PHONE, LLC | – | yes | yes |
| 203-824 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-833 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2015-07-29 | yes | yes |
| 203-836 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2011-12-06 | yes | yes |
| 203-843 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | yes | yes |
| 203-848 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 203-850 | T-Mobile METROPCS, INC. | 2008-10-03 | yes | yes |
| 203-859 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 203-865 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-867 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-868 | AT&T AT&T - LOCAL | – | yes | yes |
| 203-887 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | yes | yes |
| 203-889 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CT | – | yes | yes |
| 203-891 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-901 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | – | yes | yes |
| 203-902 | Onvoy ONVOY, LLC - CT | – | no | yes |
| 203-903 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CT | – | yes | yes |
| 203-907 | Windstream PAETEC ITEL, LLC | – | yes | yes |
| 203-909 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2008-05-13 | yes | yes |
| 203-915 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | no | yes |
| 203-927 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | – | yes | yes |
| 203-928 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-931 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-932 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-933 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-934 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-936 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | 2008-09-12 | yes | yes |
| 203-937 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-946 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | no | yes |
| 203-974 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | – | yes | yes |
| 203-980 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2002-08-20 | yes | yes |
| 203-985 | AT&T SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | – | yes | yes |
| 203-988 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | – | no | yes |
| 203-996 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | 2001-12-14 | yes | yes |
| 203-999 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | 2011-03-09 | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | AT&T | 69 | 47.6% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | Verizon | 17 | 11.7% |
| OMNIPOINT COMMUNICATIONS, INC. - CT | T-Mobile | 15 | 10.3% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | AT&T | 14 | 9.7% |
| LEVEL 3 COMMUNICATIONS, LLC - CT | Lumen | 5 | 3.4% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CT | AT&T | 4 | 2.8% |
| AMERICAN MESSAGING SERVICES, LLC | American Messaging | 4 | 2.8% |
| PAETEC ITEL, LLC | Windstream | 4 | 2.8% |
| BANDWIDTH.COM CLEC, LLC - CT | Bandwidth | 2 | 1.4% |
| SPOK, INC. | Spok | 2 | 1.4% |
| COMCAST IP PHONE, LLC | Comcast | 2 | 1.4% |
| METROPCS, INC. | T-Mobile | 2 | 1.4% |
| CABLEVISION LIGHTPATH, INC. - CT | Altice | 1 | 0.7% |
| PEERLESS NETWORK OF CONNECTICUT, LLC - CT | Peerless | 1 | 0.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 1 | 0.7% |
| AT&T - LOCAL | AT&T | 1 | 0.7% |
| ONVOY, LLC - CT | Onvoy | 1 | 0.7% |
Same rate center in other codes
Overlay codes cover the same geography, so one rate center is served by all of them.
Frequently asked
Which prefixes belong to NEW HAVEN in area code 203?
145 blocks: 200, 201, 214, 215, 230, 234, 239, 248, 281, 285, 287, 288 and 133 more, all listed in the table above.
Which carriers have numbers in NEW HAVEN?
SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT (69 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (17 blocks), OMNIPOINT COMMUNICATIONS, INC. - CT (15 blocks), NEW CINGULAR WIRELESS PCS, LLC - DC (14 blocks), LEVEL 3 COMMUNICATIONS, LLC - CT (5 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CT (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is NEW HAVEN a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.