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
2023-05-01 626-697 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALHAMBRA CA
2023-04-12 626-687 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SNGBLCNN CA
2023-03-10 626-682 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALHAMBRA CA
2023-01-27 626-681 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 EL MONTE CA
2022-12-06 626-670 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALHAMBRA CA
2022-11-09 626-654 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PSDN PSDN CA
2022-11-08 626-762 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C EL MONTE CA
2022-08-29 626-659 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PSDN PSDN CA
2022-08-25 626-645 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H ALHAMBRA CA
2022-08-12 626-640 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2022-07-22 626-613 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2022-05-27 626-563 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PSDN PSDN CA
2022-05-27 626-601 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LA PUENTE CA
2022-05-24 626-776 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ALHAMBRA CA
2022-04-26 626-828 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H SIERRAMADR CA
2022-04-26 626-878 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MONROVIA CA
2022-03-18 626-929 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ARCADIA CA
2022-03-18 626-996 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H LA PUENTE CA
2022-02-17 626-949 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ALHAMBRA CA
2022-02-17 626-990 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H AZUSA CA
2022-01-14 626-746 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J COVINA CA
2022-01-07 626-635 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 AZUSA CA
2021-12-21 626-637 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ARCADIA CA
2021-12-21 626-816 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H EL MONTE CA
2021-12-21 626-879 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MONROVIA CA
2021-12-21 626-886 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LA PUENTE CA
2021-12-10 626-630 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PSDN PSDN CA
2021-11-16 626-901 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H COVINA CA
2021-11-15 626-597 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2021-11-03 626-702 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C LA PUENTE CA
2021-10-26 626-565 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E ALHAMBRA CA
2021-10-26 626-596 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E EL MONTE CA
2021-09-24 626-591 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H COVINA CA
2021-08-23 626-725 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2021-08-02 626-663 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H AZUSA CA
2021-08-02 626-772 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H COVINA CA
2021-08-02 626-880 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LA PUENTE CA
2021-08-02 626-978 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H EL MONTE CA
2021-07-07 626-767 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PSDN PSDN CA
2021-07-07 626-770 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ALHAMBRA CA
2021-05-28 626-621 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E AZUSA CA
2021-05-10 626-612 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 COVINA CA
2021-04-29 626-595 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AZUSA CA
2021-03-22 626-561 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2021-03-17 626-876 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LA PUENTE CA
2021-03-17 626-884 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ALHAMBRA CA
2021-02-28 626-558 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2021-01-29 626-553 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ALHAMBRA CA
2020-12-28 626-669 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H EL MONTE CA
2020-12-28 626-887 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNGBLCNN 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.