WINDSOR prefixes in area code 970
NANPA records 10 assigned NXX blocks to rate center WINDSOR in area code 970, 1.3% of the 786 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. 7 holders hold those blocks, the largest being NEW CINGULAR WIRELESS PCS, LLC (2), COMCAST IP PHONE, LLC (2), QWEST CORPORATION (2). The earliest assignment on record here is 2001-06-14 and the most recent 2025-01-21. 8 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 217, 252, 369, 440 – 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 |
|---|---|---|---|---|
| 970-303 | Charter ONVOY SPECTRUM, LLC | 2025-01-21 | yes | yes |
| 970-388 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-06-14 | yes | yes |
| 970-460 | Comcast COMCAST IP PHONE, LLC | 2006-02-09 | yes | yes |
| 970-545 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-11-07 | yes | yes |
| 970-561 | Comcast COMCAST IP PHONE, LLC | 2019-07-09 | yes | yes |
| 970-600 | TELSTAR COMMUNICATIONS INC | 2010-04-12 | no | yes |
| 970-674 | Lumen QWEST CORPORATION | – | yes | yes |
| 970-686 | Lumen QWEST CORPORATION | – | no | yes |
| 970-795 | Bandwidth BANDWIDTH.COM CLEC, LLC - CO | – | yes | yes |
| 970-833 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2013-12-03 | 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 |
|---|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 2 | 20% |
| COMCAST IP PHONE, LLC | Comcast | 2 | 20% |
| QWEST CORPORATION | Lumen | 2 | 20% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 10% |
| TELSTAR COMMUNICATIONS INC | – | 1 | 10% |
| BANDWIDTH.COM CLEC, LLC - CO | Bandwidth | 1 | 10% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 1 | 10% |
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 WINDSOR in area code 970?
10 blocks: 303, 388, 460, 545, 561, 600, 674, 686, 795, 833. The table above gives the holder of each.
Which carriers have numbers in WINDSOR?
NEW CINGULAR WIRELESS PCS, LLC (2 blocks), COMCAST IP PHONE, LLC (2 blocks), QWEST CORPORATION (2 blocks), ONVOY SPECTRUM, LLC (1 block), TELSTAR COMMUNICATIONS INC (1 block), BANDWIDTH.COM CLEC, LLC - CO (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is WINDSOR 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.