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

GARDEN GRV prefixes in area code 657

NANPA records 31 assigned NXX blocks to rate center GARDEN GRV in area code 657, 4.4% of the 703 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. 11 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (12), T-MOBILE USA, INC. (7), ONVOY, LLC - CA (3). The earliest assignment on record here is 2010-05-18 and the most recent 2026-10-21. 30 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 641, 714 – overlay codes cover the same geography, so a rate center is served by all of them.

31 assigned blocks – 4.4% of 657
11 holders of record
30 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
657-206 T-Mobile T-MOBILE USA, INC. 2010-05-18 yes yes
657-233 AT&T AT&T ENTERPRISES, LLC 2014-01-24 yes yes
657-250 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2015-07-10 yes yes
657-251 Charter TWC IP ENABLED SERVICES, LLC 2014-04-11 yes yes
657-263 T-Mobile METROPCS NETWORKS, LLC 2015-01-09 yes yes
657-296 T-Mobile T-MOBILE USA, INC. 2015-11-23 yes yes
657-326 SHELCOMM 2018-05-08 no yes
657-377 Onvoy ONVOY, LLC - CA 2016-03-22 yes yes
657-427 AT&T NEW CINGULAR WIRELESS PCS, LLC 2020-03-19 yes yes
657-523 T-Mobile T-MOBILE USA, INC. 2021-09-27 yes yes
657-583 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2022-05-06 yes yes
657-606 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA – yes yes
657-612 T-Mobile T-MOBILE USA, INC. 2022-07-22 yes yes
657-636 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2022-11-09 yes yes
657-667 Charter TWC IP ENABLED SERVICES, LLC 2013-03-15 yes yes
657-679 T-Mobile T-MOBILE USA, INC. 2023-08-10 yes yes
657-686 TON80 COMMUNICATIONS, LLC 2022-02-21 yes yes
657-701 Onvoy ONVOY, LLC - CA 2023-10-02 yes yes
657-710 T-Mobile T-MOBILE USA, INC. 2023-12-05 yes yes
657-722 Bandwidth BANDWIDTH.COM CLEC, LLC - CA – yes yes
657-754 T-Mobile T-MOBILE USA, INC. 2024-07-30 yes yes
657-772 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2024-10-21 yes yes
657-800 Onvoy ONVOY, LLC - CA – yes yes
657-805 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2025-03-27 yes yes
657-816 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2025-06-04 yes yes
657-838 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2025-11-14 yes yes
657-847 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2026-04-10 yes yes
657-874 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2026-06-04 yes yes
657-884 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2026-08-07 yes yes
657-894 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2026-10-21 yes no
657-944 FRACTEL, LLC 2020-11-06 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 - CA Verizon 12 38.7%
T-MOBILE USA, INC. T-Mobile 7 22.6%
ONVOY, LLC - CA Onvoy 3 9.7%
TWC IP ENABLED SERVICES, LLC Charter 2 6.5%
AT&T ENTERPRISES, LLC AT&T 1 3.2%
METROPCS NETWORKS, LLC T-Mobile 1 3.2%
SHELCOMM – 1 3.2%
NEW CINGULAR WIRELESS PCS, LLC AT&T 1 3.2%
TON80 COMMUNICATIONS, LLC – 1 3.2%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 3.2%
FRACTEL, LLC – 1 3.2%

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 GARDEN GRV in area code 657?

31 blocks: 206, 233, 250, 251, 263, 296, 326, 377, 427, 523, 583, 606 and 19 more, all listed in the table above.

Which carriers have numbers in GARDEN GRV?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (12 blocks), T-MOBILE USA, INC. (7 blocks), ONVOY, LLC - CA (3 blocks), TWC IP ENABLED SERVICES, LLC (2 blocks), AT&T ENTERPRISES, LLC (1 block), METROPCS NETWORKS, 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 GARDEN GRV 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 657

All 703 prefixes in 657