STAMFORD prefixes in area code 475
NANPA records 27 assigned NXX blocks to rate center STAMFORD in area code 475, 9.2% of the 292 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. 11 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (11), ONVOY, LLC - CT (4), NEW CINGULAR WIRELESS PCS, LLC - DC (3). The earliest assignment on record here is 2012-08-23 and the most recent 2025-02-07. 27 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 203, 308, 325, 607 – overlay codes cover the same geography, so a rate center is served by all of them.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 475-205 | Lumen CENTURYLINK COMMUNICATIONS, LLC | 2012-08-23 | yes | yes |
| 475-213 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2015-05-12 | yes | yes |
| 475-214 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2016-04-25 | yes | yes |
| 475-217 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2016-07-01 | yes | yes |
| 475-226 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2015-11-25 | yes | yes |
| 475-229 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2016-07-01 | yes | yes |
| 475-232 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CT | 2016-07-25 | yes | yes |
| 475-268 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | 2020-02-13 | yes | yes |
| 475-276 | T-Mobile OMNIPOINT COMMUNICATIONS, INC. - CT | 2021-07-02 | yes | yes |
| 475-292 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2015-10-08 | yes | yes |
| 475-299 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2015-01-20 | yes | yes |
| 475-333 | Telnyx TELNYX LLC | 2017-02-27 | yes | yes |
| 475-334 | Onvoy ONVOY, LLC - CT | 2023-07-12 | yes | yes |
| 475-346 | Onvoy ONVOY, LLC - CT | 2023-12-08 | yes | yes |
| 475-350 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2015-11-16 | yes | yes |
| 475-359 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2017-04-14 | yes | yes |
| 475-385 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-01-08 | yes | yes |
| 475-388 | AT&T NEW CINGULAR WIRELESS PCS, LLC - DC | 2025-02-07 | yes | yes |
| 475-399 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2015-09-17 | yes | yes |
| 475-400 | Onvoy ONVOY, LLC - CT | 2017-11-21 | yes | yes |
| 475-419 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2015-07-01 | yes | yes |
| 475-477 | Onvoy ONVOY, LLC - CT | 2019-12-17 | yes | yes |
| 475-550 | BARR TEL USA, INC. - CT | 2022-03-02 | yes | yes |
| 475-619 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 2014-12-23 | yes | yes |
| 475-685 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 2018-08-28 | yes | yes |
| 475-746 | TON80 COMMUNICATIONS, LLC | 2022-01-07 | yes | yes |
| 475-977 | FRACTEL, LLC | 2020-07-22 | 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 |
|---|---|---|---|
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | Verizon | 11 | 40.7% |
| ONVOY, LLC - CT | Onvoy | 4 | 14.8% |
| NEW CINGULAR WIRELESS PCS, LLC - DC | AT&T | 3 | 11.1% |
| OMNIPOINT COMMUNICATIONS, INC. - CT | T-Mobile | 2 | 7.4% |
| CENTURYLINK COMMUNICATIONS, LLC | Lumen | 1 | 3.7% |
| LEVEL 3 COMMUNICATIONS, LLC - CT | Lumen | 1 | 3.7% |
| TELNYX LLC | Telnyx | 1 | 3.7% |
| BARR TEL USA, INC. - CT | – | 1 | 3.7% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CT | AT&T | 1 | 3.7% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 3.7% |
| FRACTEL, LLC | – | 1 | 3.7% |
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 STAMFORD in area code 475?
27 blocks: 205, 213, 214, 217, 226, 229, 232, 268, 276, 292, 299, 333 and 15 more, all listed in the table above.
Which carriers have numbers in STAMFORD?
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT (11 blocks), ONVOY, LLC - CT (4 blocks), NEW CINGULAR WIRELESS PCS, LLC - DC (3 blocks), OMNIPOINT COMMUNICATIONS, INC. - CT (2 blocks), CENTURYLINK COMMUNICATIONS, LLC (1 block), LEVEL 3 COMMUNICATIONS, LLC - CT (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is STAMFORD 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.