AURORA prefixes in area code 331
NANPA records 45 assigned NXX blocks to rate center AURORA in area code 331, 20.1% of the 224 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. 13 holders hold those blocks, the largest being T-MOBILE USA, INC. (16), ONVOY, LLC (7), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6). The earliest assignment on record here is 2007-07-11 and the most recent 2025-08-28. 45 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 207, 218, 234, 252 – 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 |
|---|---|---|---|---|
| 331-203 | T-Mobile T-MOBILE USA, INC. | 2011-10-12 | yes | yes |
| 331-205 | T-Mobile T-MOBILE USA, INC. | 2011-10-21 | yes | yes |
| 331-206 | T-Mobile T-MOBILE USA, INC. | 2011-10-12 | yes | yes |
| 331-208 | Lumen LEVEL 3 COMMUNICATIONS, LLC - IL | 2011-11-08 | yes | yes |
| 331-212 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 2012-04-05 | yes | yes |
| 331-219 | Telnyx TELNYX LLC | 2017-03-16 | yes | yes |
| 331-220 | T-Mobile T-MOBILE USA, INC. | 2011-07-12 | yes | yes |
| 331-230 | T-Mobile T-MOBILE USA, INC. | 2017-04-05 | yes | yes |
| 331-250 | T-Mobile T-MOBILE USA, INC. | 2012-04-10 | yes | yes |
| 331-255 | Onvoy ONVOY, LLC | 2017-08-22 | yes | yes |
| 331-256 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2011-09-13 | yes | yes |
| 331-257 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2020-01-17 | yes | yes |
| 331-258 | Onvoy ONVOY, LLC | – | yes | yes |
| 331-262 | T-Mobile T-MOBILE USA, INC. | 2008-07-30 | yes | yes |
| 331-269 | T-Mobile T-MOBILE USA, INC. | 2021-05-14 | yes | yes |
| 331-270 | Onvoy ONVOY, LLC | 2021-07-20 | yes | yes |
| 331-274 | T-Mobile T-MOBILE USA, INC. | 2021-08-03 | yes | yes |
| 331-278 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2021-08-13 | yes | yes |
| 331-287 | Bandwidth BANDWIDTH.COM CLEC, LLC - IL | 2022-07-20 | yes | yes |
| 331-290 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2022-08-26 | yes | yes |
| 331-293 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2023-01-10 | yes | yes |
| 331-295 | NUSO, LLC | 2023-02-07 | yes | yes |
| 331-300 | T-Mobile T-MOBILE USA, INC. | 2016-03-17 | yes | yes |
| 331-301 | T-Mobile METROPCS, INC. | – | yes | yes |
| 331-302 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2013-02-11 | yes | yes |
| 331-312 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2023-11-06 | yes | yes |
| 331-319 | Onvoy ONVOY, LLC | 2024-01-24 | yes | yes |
| 331-321 | T-Mobile T-MOBILE USA, INC. | 2015-07-20 | yes | yes |
| 331-329 | Onvoy ONVOY, LLC | 2025-01-08 | yes | yes |
| 331-331 | Onvoy ONVOY, LLC | 2025-08-21 | yes | yes |
| 331-336 | FRACTEL, LLC | 2019-10-11 | yes | yes |
| 331-338 | Charter ONVOY SPECTRUM, LLC | 2025-01-29 | yes | yes |
| 331-339 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2025-08-28 | yes | yes |
| 331-385 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2016-09-28 | yes | yes |
| 331-425 | T-Mobile T-MOBILE USA, INC. | 2007-07-11 | yes | yes |
| 331-431 | Bandwidth BANDWIDTH.COM CLEC, LLC - IL | 2010-05-26 | yes | yes |
| 331-452 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2007-09-20 | yes | yes |
| 331-454 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2009-05-07 | yes | yes |
| 331-575 | T-Mobile T-MOBILE USA, INC. | 2007-09-18 | yes | yes |
| 331-643 | T-Mobile T-MOBILE USA, INC. | 2007-09-18 | yes | yes |
| 331-666 | Onvoy ONVOY, LLC | 2017-09-29 | yes | yes |
| 331-684 | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | 2007-07-12 | yes | yes |
| 331-707 | T-Mobile T-MOBILE USA, INC. | 2016-08-23 | yes | yes |
| 331-758 | FRACTEL, LLC | 2021-10-27 | yes | yes |
| 331-980 | T-Mobile T-MOBILE USA, INC. | 2014-10-13 | 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 |
|---|---|---|---|
| T-MOBILE USA, INC. | T-Mobile | 16 | 35.6% |
| ONVOY, LLC | Onvoy | 7 | 15.6% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | Verizon | 6 | 13.3% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 5 | 11.1% |
| BANDWIDTH.COM CLEC, LLC - IL | Bandwidth | 2 | 4.4% |
| FRACTEL, LLC | – | 2 | 4.4% |
| LEVEL 3 COMMUNICATIONS, LLC - IL | Lumen | 1 | 2.2% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | Verizon | 1 | 2.2% |
| TELNYX LLC | Telnyx | 1 | 2.2% |
| NUSO, LLC | – | 1 | 2.2% |
| METROPCS, INC. | T-Mobile | 1 | 2.2% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 2.2% |
| RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | – | 1 | 2.2% |
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 AURORA in area code 331?
45 blocks: 203, 205, 206, 208, 212, 219, 220, 230, 250, 255, 256, 257 and 33 more, all listed in the table above.
Which carriers have numbers in AURORA?
T-MOBILE USA, INC. (16 blocks), ONVOY, LLC (7 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (5 blocks), BANDWIDTH.COM CLEC, LLC - IL (2 blocks), FRACTEL, LLC (2 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is AURORA 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.