NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

2 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, last 30 days — NPA 424
ONVOY, LLC - CA 2
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
2021-11-16 424-902 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H SNMN SNMN CA
2021-11-10 424-463 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 INGLEWOOD CA
2021-10-28 424-454 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CMTN CMTN CA
2021-10-28 424-460 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CULVERCITY CA
2021-10-04 424-469 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CMTN GRDN CA
2021-09-24 424-461 0–9 XXXall 10 · 6 holders which blocks → COMMIO, LLC 939H LOMITA CA
2021-09-24 424-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H W ANGELES CA
2021-09-23 424-459 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H HAWTHORNE CA
2021-09-21 424-857 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H SNMN MRVS CA
2021-09-21 424-955 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CMTN CMTN CA
2021-09-16 424-722 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNMN SNMN CA
2021-09-16 424-866 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H REDONDO CA
2021-08-31 424-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H INGLEWOOD CA
2021-08-26 424-458 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E REDONDO CA
2021-08-25 424-453 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BEVERLYHLS CA
2021-08-17 424-457 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2021-07-30 424-451 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN PEDRO CA
2021-07-08 424-699 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H TORRANCE CA
2021-07-07 424-466 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H BEVERLYHLS CA
2021-06-17 424-449 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CMTN CMTN CA
2021-06-17 424-587 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CULVERCITY CA
2021-05-03 424-678 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EL SEGUNDO CA
2021-04-01 424-566 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BEVERLYHLS CA
2021-04-01 424-599 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BEVERLYHLS CA
2021-03-19 424-448 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2021-02-25 424-799 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MALIBU CA
2021-01-28 424-524 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H MALIBU CA
2021-01-04 424-667 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LOMITA CA
2020-11-06 424-966 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H REDONDO CA
2020-09-08 424-447 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INGLEWOOD CA
2020-07-31 424-786 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H MALIBU CA
2020-07-10 424-842 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H W ANGELES CA
2020-07-02 424-588 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HAWTHORNE CA
2020-06-05 424-688 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H LOMITA CA
2020-05-28 424-455 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H CULVERCITY CA
2020-05-28 424-577 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H INGLEWOOD CA
2020-05-28 424-677 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H REDONDO CA
2020-05-28 424-766 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNMN MRVS CA
2020-05-28 424-788 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SAN PEDRO CA
2020-05-28 424-877 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SNMN SNMN CA
2020-05-28 424-946 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H W ANGELES CA
2020-05-27 424-424 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CMTN GRDN CA
2020-05-14 424-446 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BEVERLYHLS CA
2020-03-18 424-445 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2020-02-05 424-415 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CMTN GRDN CA
2020-01-31 424-441 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MALIBU CA
2019-09-11 424-439 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 INGLEWOOD CA
2019-08-13 424-438 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BEVERLYHLS CA
2019-08-07 424-437 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HAWTHORNE CA
2019-08-05 424-436 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNMN SNMN 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.