LOMBARD prefixes in area code 331
NANPA records 13 assigned NXX blocks to rate center LOMBARD in area code 331, 5.8% 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. 7 holders hold those blocks, the largest being ONVOY, LLC (3), T-MOBILE USA, INC. (3), NEW CINGULAR WIRELESS PCS, LLC - IL (3). The earliest assignment on record here is 2008-08-23 and the most recent 2024-02-08. 13 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 |
|---|---|---|---|---|
| 331-217 | Onvoy ONVOY, LLC | 2023-07-11 | yes | yes |
| 331-241 | Onvoy ONVOY, LLC | – | yes | yes |
| 331-242 | T-Mobile T-MOBILE USA, INC. | 2018-10-19 | yes | yes |
| 331-243 | T-Mobile T-MOBILE USA, INC. | 2018-10-19 | yes | yes |
| 331-267 | Vonage VONAGE AMERICA LLC | 2020-09-18 | yes | yes |
| 331-277 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2021-08-06 | yes | yes |
| 331-307 | T-Mobile T-MOBILE USA, INC. | 2014-10-13 | yes | yes |
| 331-315 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2016-08-08 | yes | yes |
| 331-322 | Onvoy ONVOY, LLC | 2024-02-08 | yes | yes |
| 331-462 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 2008-08-23 | yes | yes |
| 331-551 | AT&T NEW CINGULAR WIRELESS PCS, LLC - IL | 2008-11-05 | yes | yes |
| 331-627 | TON80 COMMUNICATIONS, LLC | 2022-02-25 | yes | yes |
| 331-899 | FRACTEL, LLC | 2020-12-22 | 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 |
|---|---|---|---|
| ONVOY, LLC | Onvoy | 3 | 23.1% |
| T-MOBILE USA, INC. | T-Mobile | 3 | 23.1% |
| NEW CINGULAR WIRELESS PCS, LLC - IL | AT&T | 3 | 23.1% |
| VONAGE AMERICA LLC | Vonage | 1 | 7.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | Verizon | 1 | 7.7% |
| TON80 COMMUNICATIONS, LLC | – | 1 | 7.7% |
| FRACTEL, LLC | – | 1 | 7.7% |
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 LOMBARD in area code 331?
13 blocks: 217, 241, 242, 243, 267, 277, 307, 315, 322, 462, 551, 627 and 1 more, all listed in the table above.
Which carriers have numbers in LOMBARD?
ONVOY, LLC (3 blocks), T-MOBILE USA, INC. (3 blocks), NEW CINGULAR WIRELESS PCS, LLC - IL (3 blocks), VONAGE AMERICA LLC (1 block), MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL (1 block), TON80 COMMUNICATIONS, LLC (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is LOMBARD 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.