NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 818
PACIFIC BELL 266
NEW CINGULAR WIRELESS PCS, LLC 73
T-MOBILE USA, INC. 71
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 63
FRONTIER CALIFORNIA INC. 37
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
2025-12-11 818-607 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CA 649C CANOGAPARK CA
2025-01-02 818-417 0XXX1XXX8XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SNFN GRHL CA
2024-06-21 818-690 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BRBN SNVY CA
2024-03-14 818-443 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CANOGAPARK CA
2024-01-02 818-412 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H VAN NUYS CA
2024-01-02 818-463 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CANOGAPARK CA
2023-12-05 818-278 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H NO HOLLYWD CA
2023-10-02 818-418 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LACRSCENTA CA
2020-01-15 818-873 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LACRSCENTA CA
2017-08-22 818-740 0–9 XXXall 10 · 4 holders which blocks → INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H NO HOLLYWD CA
2017-04-14 818-791 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNFN SPLV CA
2016-02-08 818-214 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C RESEDA CA
2015-02-23 818-818 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 NORTHRIDGE CA
2015-02-06 818-619 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SNFN PACM CA
2015-02-03 818-747 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2015-01-20 818-858 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E GLENDALE CA
2015-01-13 818-213 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 RESEDA CA
2014-12-01 818-805 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C CANOGAPARK CA
2014-11-18 818-650 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E VAN NUYS CA
2014-10-08 818-210 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2014-10-06 818-966 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNFN GRHL CA
2014-10-03 818-318 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AGOURA CA
2014-08-28 818-617 0–9 XXXall 10 · 5 holders which blocks → PACIFIC BELL (COMPETITIVE) 7480 SNFN SNFN CA
2014-08-11 818-208 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E VAN NUYS CA
2014-08-04 818-629 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AGOURA CA
2014-08-04 818-928 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K PSDN LACN CA
2014-06-20 818-918 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CANOGAPARK CA
2014-06-19 818-960 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NORTHRIDGE CA
2014-06-13 818-940 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BRBN BRBN CA
2014-05-23 818-423 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2014-05-07 818-965 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CANOGAPARK CA
2014-04-18 818-930 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AGOURA CA
2014-03-21 818-946 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 VAN NUYS CA
2014-02-10 818-964 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E AGOURA CA
2014-01-31 818-860 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BRBN BRBN CA
2014-01-24 818-796 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 VAN NUYS CA
2014-01-24 818-927 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2013-10-17 818-852 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C AGOURA CA
2013-08-27 818-722 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFN SPLV CA
2013-08-26 818-853 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C NO HOLLYWD CA
2013-07-12 818-696 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E GLENDALE CA
2013-06-13 818-938 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RESEDA CA
2013-06-06 818-697 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RESEDA CA
2013-02-14 818-616 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K VAN NUYS CA
2013-02-01 818-452 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NO HOLLYWD CA
2012-09-24 818-856 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E NO HOLLYWD CA
2012-03-12 818-875 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SUNLD TJNG CA
2012-02-14 818-798 0–9 XXXall 10 · 4 holders which blocks → PACIFIC BELL 9740 RESEDA CA
2011-08-09 818-821 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NO HOLLYWD CA
2011-06-08 818-976 not yet reported which blocks → NORTH COUNTY COMMUNICATION CORPORATION - CA 7894 VAN NUYS CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.