NAPERVILLE prefixes in area code 331
NANPA records 33 assigned NXX blocks to rate center NAPERVILLE in area code 331, 14.7% 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. 12 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (11), NEW CINGULAR WIRELESS PCS, LLC - IL (5), ONVOY, LLC (4). The earliest assignment on record here is 2008-08-19 and the most recent 2026-05-18. 33 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 code 630 – 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 |
|---|---|---|---|---|
| 331-204 | Onvoy ONVOY, LLC | 2015-12-10 | yes | yes |
| 331-213 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2011-09-06 | yes | yes |
| 331-215 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2012-09-28 | yes | yes |
| 331-226 | T-Mobile T-MOBILE USA, INC. | 2017-03-20 | yes | yes |
| 331-229 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2012-11-27 | yes | yes |
| 331-231 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2017-08-07 | yes | yes |
| 331-237 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 2017-11-07 | yes | yes |
| 331-244 | Onvoy ONVOY, LLC | 2017-09-21 | yes | yes |
| 331-247 | Vonage VONAGE AMERICA LLC | 2018-11-21 | yes | yes |
| 331-249 | Onvoy ONVOY, LLC | 2018-12-05 | yes | yes |
| 331-281 | AT&T ILLINOIS BELL TEL CO | 2012-10-25 | yes | yes |
| 331-285 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2022-05-04 | yes | yes |
| 331-294 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2023-01-12 | yes | yes |
| 331-298 | Onvoy ONVOY, LLC | 2023-08-09 | yes | yes |
| 331-305 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2013-08-15 | yes | yes |
| 331-313 | Charter ONVOY SPECTRUM, LLC | 2022-08-16 | yes | yes |
| 331-316 | COMMIO, LLC | 2024-01-04 | yes | yes |
| 331-328 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2024-12-16 | yes | yes |
| 331-330 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2008-08-19 | yes | yes |
| 331-332 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2008-11-03 | yes | yes |
| 331-333 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2008-11-03 | yes | yes |
| 331-342 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2025-11-18 | yes | yes |
| 331-345 | FRACTEL, LLC | 2020-11-18 | yes | yes |
| 331-346 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2026-05-18 | yes | yes |
| 331-401 | Lumen LEVEL 3 COMMUNICATIONS, LLC - IL | 2015-12-14 | yes | yes |
| 331-444 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2010-08-04 | yes | yes |
| 331-457 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2008-11-14 | yes | yes |
| 331-472 | T-Mobile T-MOBILE USA, INC. | 2008-10-22 | yes | yes |
| 331-529 | FRACTEL, LLC | 2019-08-08 | yes | yes |
| 331-688 | TON80 COMMUNICATIONS, LLC | 2022-02-17 | yes | yes |
| 331-701 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 2014-12-11 | yes | yes |
| 331-702 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 2013-10-23 | yes | yes |
| 331-814 | T-Mobile T-MOBILE USA, INC. | 2015-06-25 | 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 - IL | Verizon | 11 | 33.3% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 5 | 15.2% |
| ONVOY, LLC | Onvoy | 4 | 12.1% |
| T-MOBILE USA, INC. | T-Mobile | 3 | 9.1% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | Verizon | 2 | 6.1% |
| FRACTEL, LLC | – | 2 | 6.1% |
| VONAGE AMERICA LLC | Vonage | 1 | 3% |
| ILLINOIS BELL TEL CO | AT&T | 1 | 3% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 3% |
| COMMIO, LLC | – | 1 | 3% |
| LEVEL 3 COMMUNICATIONS, LLC - IL | Lumen | 1 | 3% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 3% |
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 NAPERVILLE in area code 331?
33 blocks: 204, 213, 215, 226, 229, 231, 237, 244, 247, 249, 281, 285 and 21 more, all listed in the table above.
Which carriers have numbers in NAPERVILLE?
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (11 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (5 blocks), ONVOY, LLC (4 blocks), T-MOBILE USA, INC. (3 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES 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 NAPERVILLE 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.