NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 626
PACIFIC BELL 116
T-MOBILE USA, INC. 106
NEW CINGULAR WIRELESS PCS, LLC 83
FRONTIER CALIFORNIA INC. 75
ONVOY, LLC - CA 43
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2016-08-30 626-491 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PSDN PSDN CA
2016-08-02 626-615 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2016-06-24 626-210 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K AZUSA CA
2016-05-02 626-360 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PSDN PSDN CA
2016-04-12 626-877 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F EL MONTE CA
2016-04-12 626-977 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LA PUENTE CA
2016-02-11 626-349 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ALHAMBRA CA
2016-01-26 626-314 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PSDN PSDN CA
2016-01-20 626-727 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C COVINA CA
2015-11-23 626-313 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2015-10-23 626-493 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2015-10-08 626-341 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2015-10-02 626-474 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LA PUENTE CA
2015-09-08 626-265 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALHAMBRA CA
2015-08-14 626-438 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2015-08-03 626-420 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2015-06-11 626-554 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALHAMBRA CA
2015-06-05 626-464 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2015-04-13 626-620 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2015-04-06 626-364 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 COVINA CA
2015-04-01 626-361 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EL MONTE CA
2015-03-30 626-223 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALHAMBRA CA
2015-03-25 626-346 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LA PUENTE CA
2015-03-25 626-714 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PSDN PSDN CA
2015-03-25 626-838 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E COVINA CA
2015-03-11 626-362 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2015-02-03 626-365 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 PSDN PSDN CA
2015-01-27 626-342 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2014-11-25 626-541 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K COVINA CA
2014-11-06 626-295 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-10-27 626-522 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K EL MONTE CA
2014-10-14 626-267 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2014-10-13 626-741 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C ALHAMBRA CA
2014-09-03 626-693 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARCADIA CA
2014-08-28 626-684 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ARCADIA CA
2014-08-21 626-238 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALHAMBRA CA
2014-07-25 626-634 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 COVINA CA
2014-07-21 626-624 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-07-21 626-734 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARCADIA CA
2014-07-21 626-861 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2014-07-18 626-658 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PSDN PSDN CA
2014-04-11 626-559 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2013-03-12 626-986 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LA PUENTE CA
2013-03-10 626-671 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COVINA CA
2013-02-04 626-225 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LA PUENTE CA
2013-02-01 626-427 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ALHAMBRA CA
2012-12-26 626-218 0–9 XXXwhole prefix which blocks → PACIFIC BELL (COMPETITIVE) 7480 MONROVIA CA
2012-11-07 626-460 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PSDN PSDN CA
2012-06-29 626-328 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2011-10-24 626-269 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA PUENTE CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.