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

HRCUL-RODE prefixes in area code 510

NANPA records 14 assigned NXX blocks to rate center HRCUL-RODE in area code 510, 1.8% of the 785 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 MCIMETRO ACCESS TRANSMISSION SERVICES LLC (3), ONVOY, LLC - CA (3), T-MOBILE USA, INC. (2). The earliest assignment on record here is 2001-09-19 and the most recent 2018-08-31. 12 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 341 – overlay codes cover the same geography, so a rate center is served by all of them.

14 assigned blocks – 1.8% of 510
7 holders of record
12 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
510-224 T-Mobile T-MOBILE USA, INC. 2001-10-18 yes yes
510-245 AT&T PACIFIC BELL – no yes
510-296 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
510-313 AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA – yes yes
510-322 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
510-327 Onvoy ONVOY, LLC - CA – yes yes
510-592 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
510-617 Onvoy ONVOY, LLC - CA 2018-08-31 yes yes
510-691 T-Mobile T-MOBILE USA, INC. 2001-09-19 yes yes
510-799 AT&T PACIFIC BELL – no yes
510-803 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC – yes yes
510-939 Bandwidth BANDWIDTH.COM CLEC, LLC - CA 2015-03-25 yes yes
510-948 Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC 2004-08-18 yes yes
510-949 Onvoy ONVOY, LLC - CA 2016-07-15 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
MCIMETRO ACCESS TRANSMISSION SERVICES LLC Verizon 3 21.4%
ONVOY, LLC - CA Onvoy 3 21.4%
T-MOBILE USA, INC. T-Mobile 2 14.3%
PACIFIC BELL AT&T 2 14.3%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 2 14.3%
TELEPORT COMMUNICATIONS AMERICA, LLC - CA AT&T 1 7.1%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 7.1%

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 HRCUL-RODE in area code 510?

14 blocks: 224, 245, 296, 313, 322, 327, 592, 617, 691, 799, 803, 939 and 2 more, all listed in the table above.

Which carriers have numbers in HRCUL-RODE?

MCIMETRO ACCESS TRANSMISSION SERVICES LLC (3 blocks), ONVOY, LLC - CA (3 blocks), T-MOBILE USA, INC. (2 blocks), PACIFIC BELL (2 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (2 blocks), TELEPORT COMMUNICATIONS AMERICA, LLC - CA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is HRCUL-RODE 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 510

All 785 prefixes in 510