NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

DOWNERSGRV prefixes in area code 331

NANPA records 21 assigned NXX blocks to rate center DOWNERSGRV in area code 331, 9.4% 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. 8 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (9), TELEPORT COMMUNICATIONS AMERICA, LLC - IL (3), ONVOY, LLC (3). The earliest assignment on record here is 2008-10-29 and the most recent 2024-03-28. 21 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.

21 assigned blocks – 9.4% of 331
8 holders of record
21 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
331-201 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2012-01-06 yes yes
331-214 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2012-06-20 yes yes
331-233 Telnyx TELNYX LLC 2017-03-13 yes yes
331-238 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL 2017-12-19 yes yes
331-251 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2012-12-05 yes yes
331-260 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL 2019-02-25 yes yes
331-280 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2021-12-29 yes yes
331-291 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2022-08-26 yes yes
331-292 Charter ONVOY SPECTRUM, LLC 2022-10-14 yes yes
331-306 Onvoy ONVOY, LLC 2023-09-19 yes yes
331-326 Onvoy ONVOY, LLC 2024-03-28 yes yes
331-343 Onvoy ONVOY, LLC 2023-01-13 yes yes
331-399 FRACTEL, LLC 2021-01-22 yes yes
331-481 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2008-10-29 yes yes
331-625 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2009-10-16 yes yes
331-631 Charter ONVOY SPECTRUM, LLC 2022-07-07 yes yes
331-775 Comcast COMCAST IP PHONE, LLC 2016-01-04 yes yes
331-777 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2010-09-22 yes yes
331-801 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - IL 2014-05-15 yes yes
331-903 AT&T AT&T ENTERPRISES, LLC 2014-05-15 yes yes
331-998 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2015-09-16 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

HolderBrandBlocksShare here
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL Verizon 9 42.9%
TELEPORT COMMUNICATIONS AMERICA, LLC - IL AT&T 3 14.3%
ONVOY, LLC Onvoy 3 14.3%
ONVOY SPECTRUM, LLC Charter 2 9.5%
TELNYX LLC Telnyx 1 4.8%
FRACTEL, LLC – 1 4.8%
COMCAST IP PHONE, LLC Comcast 1 4.8%
AT&T ENTERPRISES, LLC AT&T 1 4.8%

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 DOWNERSGRV in area code 331?

21 blocks: 201, 214, 233, 238, 251, 260, 280, 291, 292, 306, 326, 343 and 9 more, all listed in the table above.

Which carriers have numbers in DOWNERSGRV?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (9 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - IL (3 blocks), ONVOY, LLC (3 blocks), ONVOY SPECTRUM, LLC (2 blocks), TELNYX LLC (1 block), FRACTEL, 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 DOWNERSGRV 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.

Other rate centers in 331

All 224 prefixes in 331