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

SHAFTER prefixes in area code 661

NANPA records 8 assigned NXX blocks to rate center SHAFTER in area code 661, 1.2% of the 674 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 T-MOBILE USA, INC. (2), BANDWIDTH.COM CLEC, LLC - CA (1), ONVOY, LLC - CA (1). The earliest assignment on record here is 2002-01-16 and the most recent 2022-09-02. 7 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

8 assigned blocks – 1.2% of 661
7 holders of record
7 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
661-237 Bandwidth BANDWIDTH.COM CLEC, LLC - CA – yes yes
661-292 T-Mobile T-MOBILE USA, INC. 2002-01-16 yes yes
661-459 Onvoy ONVOY, LLC - CA – yes yes
661-594 T-Mobile T-MOBILE USA, INC. 2022-09-02 yes yes
661-630 BHN IP ENABLED SERVICES, LLC – yes yes
661-746 AT&T PACIFIC BELL – no yes
661-776 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
661-910 AT&T NEW CINGULAR WIRELESS PCS, LLC – 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
T-MOBILE USA, INC. T-Mobile 2 25%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 12.5%
ONVOY, LLC - CA Onvoy 1 12.5%
BHN IP ENABLED SERVICES, LLC – 1 12.5%
PACIFIC BELL AT&T 1 12.5%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 12.5%
NEW CINGULAR WIRELESS PCS, LLC AT&T 1 12.5%

Frequently asked

Which prefixes belong to SHAFTER in area code 661?

8 blocks: 237, 292, 459, 594, 630, 746, 776, 910. The table above gives the holder of each.

Which carriers have numbers in SHAFTER?

T-MOBILE USA, INC. (2 blocks), BANDWIDTH.COM CLEC, LLC - CA (1 block), ONVOY, LLC - CA (1 block), BHN IP ENABLED SERVICES, LLC (1 block), PACIFIC BELL (1 block), LEVEL 3 TELECOM OF CALIFORNIA, LP - 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 SHAFTER 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 661

All 674 prefixes in 661