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 707
PACIFIC BELL 225
ONVOY, LLC - CA 96
NEW CINGULAR WIRELESS PCS, LLC 67
LEVEL 3 COMMUNICATIONS, LLC - CA 58
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 55
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
2026-07-30 707-821 0XXX1XXX2XXX which blocks → ONVOY, LLC - CA 649C EUREKA CA
2024-02-20 707-519 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2023-09-28 707-250 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 VALLEJO CA
2023-08-16 707-213 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BENICIA CA
2023-05-09 707-369 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SANTA ROSA CA
2023-05-03 707-960 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J RIO VISTA CA
2023-05-03 707-970 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WINDSOR CA
2023-04-14 707-907 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2023-03-10 707-906 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2023-02-17 707-905 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LOWER LAKE CA
2023-01-05 707-956 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 NAPA CA
2022-10-12 707-707 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C NAPA CA
2022-10-12 707-903 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VACAVILLE CA
2022-10-12 707-989 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FRFLD-SUIS CA
2022-10-12 707-991 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SONOMA CA
2022-08-09 707-916 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C ARCATA CA
2022-08-09 707-936 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C FRFLD-SUIS CA
2022-08-09 707-990 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C VALLEJO CA
2022-07-11 707-810 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BENICIA CA
2022-06-08 707-952 0–9 XXXall 10 · 5 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L UKIAH CA
2022-05-09 707-818 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C VACAVILLE CA
2022-03-08 707-941 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FORT BRAGG CA
2022-02-08 707-904 6XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FORESTVL CA
2021-12-23 707-930 2XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ANNAPOLIS CA
2021-12-16 707-909 0–9 XXXall 10 · 6 holders which blocks → SONIC TELECOM, LLC - CA 433E SANTA ROSA CA
2021-10-14 707-914 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRFLD-SUIS CA
2021-09-29 707-918 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANTA ROSA CA
2021-09-20 707-913 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 NAPA CA
2021-08-31 707-860 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2021-08-31 707-912 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ST HELENA CA
2021-08-17 707-910 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → SONIC TELECOM, LLC - CA 433E SEBASTOPOL CA
2021-08-10 707-997 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H VALLEJO CA
2021-07-19 707-908 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BENICIA CA
2021-06-30 707-807 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2021-02-25 707-858 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SANTA ROSA CA
2020-12-15 707-871 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2020-12-09 707-767 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2020-11-25 707-859 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2020-10-29 707-856 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2020-10-19 707-854 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 EUREKA CA
2020-09-21 707-852 0–9 XXXall 10 · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SANTA ROSA CA
2020-08-14 707-612 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ROSA CA
2020-08-11 707-870 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SANTA ROSA CA
2020-07-02 707-770 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FRFLD-SUIS CA
2020-07-02 707-848 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2020-07-02 707-866 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H VALLEJO CA
2020-07-02 707-977 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H NAPA CA
2020-05-08 707-831 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLERLAOAKS CA
2020-04-07 707-697 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2020-03-20 707-850 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LOWER LAKE 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.