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 805
FRONTIER CALIFORNIA INC. 140
PACIFIC BELL 115
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 100
NEW CINGULAR WIRELESS PCS, LLC 84
T-MOBILE USA, INC. 54
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
2024-05-31 805-661 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 VNTRA CNTL CA
2024-05-08 805-847 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CARPINTRIA CA
2024-03-13 805-894 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CA 649C SANTA YNEZ CA
2024-02-20 805-533 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CAMARILLO CA
2024-02-20 805-923 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWBURYPRK CA
2024-01-29 805-502 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NEWBURYPRK CA
2023-12-27 805-412 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CAMARILLO CA
2023-12-05 805-820 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SATICOY CA
2023-10-02 805-362 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SIMIVALLEY CA
2023-08-03 805-224 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWBURYPRK CA
2023-06-22 805-831 0XXX1XXX3XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CA 649C MORRO BAY CA
2023-05-22 805-805 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H SANBARBARA CA
2023-01-20 805-970 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C CAMARILLO CA
2022-12-06 805-949 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CAMARILLO CA
2022-12-06 805-993 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWBURYPRK CA
2022-07-25 805-916 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWBURYPRK CA
2022-07-14 805-972 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LOMPOC CA
2022-05-26 805-809 0–9 XXXall 10 · 3 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ARROYOGRND CA
2022-05-26 805-872 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J PASOROBLES CA
2022-05-20 805-956 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GUADALUPE CA
2022-02-28 805-891 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 MOORPARK CA
2022-02-24 805-998 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H SANTAMARIA CA
2022-02-11 805-840 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ARROYOGRND CA
2022-01-26 805-997 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H OJAI CA
2022-01-13 805-885 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CONEJO CA
2022-01-13 805-939 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E NIPOMO CA
2022-01-13 805-974 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E EL RIO CA
2021-09-24 805-818 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J SANBARBARA CA
2021-06-23 805-887 0XXX1XXX2XXX3XXX8XXX · 4 holders which blocks → TELNYX LLC 073H SANMARGART CA
2021-05-04 805-859 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ATASCADERO CA
2020-11-25 805-802 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → IP HORIZON LLC 515J SNLUSOBSPO CA
2020-11-12 805-812 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CAMARILLO CA
2020-11-05 805-849 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CONEJO CA
2019-10-18 805-721 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PASOROBLES CA
2019-08-27 805-977 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SAN MIGUEL CA
2019-02-05 805-790 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E EL RIO CA
2018-10-15 805-940 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D OXNARD CA
2018-07-31 805-992 not yet reported which blocks → SHELCOMM 0051 MOORPARK CA
2018-06-29 805-803 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTAMARIA CA
2018-05-17 805-810 0XXX9XXX which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNLUSOBSPO CA
2018-04-16 805-670 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 OXNARD CA
2018-04-13 805-609 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D OXNARD CA
2018-03-26 805-902 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SOMIS CA
2018-03-22 805-519 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARROYOGRND CA
2018-03-20 805-608 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SANTAMARIA CA
2018-02-16 805-515 0–9 XXXall 10 · 6 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J VNTRA CNTL CA
2018-01-18 805-424 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SIMIVALLEY CA
2017-12-11 805-718 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 EL RIO CA
2017-03-24 805-505 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H SNLUSOBSPO CA
2016-12-30 805-873 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D SANTAPAULA 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.