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 209
PACIFIC BELL 181
NEW CINGULAR WIRELESS PCS, LLC 128
ONVOY, LLC - CA 76
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 71
T-MOBILE USA, INC. 69
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
— 209-856 5XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC - CA 649C CROWS LDG CA
— 209-858 8XXX which blocks → FRONTIER CALIFORNIA INC. 4420 MANTECA CA
— 209-861 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
— 209-862 5XXX6XXX7XXX8XXX · 4 holders which blocks → PACIFIC BELL 9740 NEWMAN CA
— 209-863 2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → PACIFIC BELL 9740 RIVERBANK CA
— 209-867 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LOCKEFORD CA
— 209-868 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H STOCKTON CA
— 209-869 not yet reported which blocks → PACIFIC BELL 9740 RIVERBANK CA
— 209-870 9XXX which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 STOCKTON CA
— 209-873 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
— 209-874 0XXX6XXX7XXX8XXX · 4 holders which blocks → PACIFIC BELL 9740 WTFR MAIN CA
— 209-877 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E PLANADA CA
— 209-878 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PACIFIC BELL 9740 COULTERVL CA
— 209-879 1XXX2XXX3XXX8XXX9XXX · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L TRACY CA
— 209-881 2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PACIFIC BELL 9740 KNIGHTFRRY CA
— 209-882 1XXX2XXX5XXX6XXX · 3 holders which blocks → ONVOY, LLC - CA 649C HUGHSON CA
— 209-883 5XXX6XXX7XXX · 3 holders which blocks → PACIFIC BELL 9740 HUGHSON CA
— 209-885 2XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - CA 649C MILTON CA
— 209-886 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER CALIFORNIA INC. 4420 FARMINGTON CA
— 209-887 0XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER CALIFORNIA INC. 4420 LINDEN CA
— 209-890 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → IP HORIZON LLC 515J ANGELSCAMP CA
— 209-892 not yet reported which blocks → GLOBAL VALLEY NETWORKS 2315 PATTERSON CA
— 209-893 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - CA 649C PLYMOUTH CA
— 209-894 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → GLOBAL VALLEY NETWORKS 2315 PATTERSON CA
— 209-895 0XXX1XXX2XXX5XXX9XXX · 3 holders which blocks → GLOBAL VALLEY NETWORKS 2315 PATTERSON CA
— 209-896 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RIVERBANK CA
— 209-898 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 STOCKTON CA
— 209-899 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → PACIFIC BELL 9740 MILTON CA
— 209-900 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CA 649C MODESTO CA
— 209-902 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
— 209-903 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
— 209-907 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
— 209-908 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
— 209-909 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRESNO CA
— 209-910 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C STOCKTON CA
— 209-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CA
— 209-912 1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CA 649C GALT CA
— 209-914 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TRACY CA
— 209-915 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 STOCKTON CA
— 209-916 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 JAMESTOWN CA
— 209-917 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LE GRAND CA
— 209-918 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MODESTO CA
— 209-920 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L VALLEY SPG CA
— 209-924 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIPON CA
— 209-926 4XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - CA 649C STOCKTON CA
— 209-927 1XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CA 649C MOCCASIN CA
— 209-928 not yet reported which blocks → CITIZENS TELECOM DBA FRONTIER COMM OF TOULUMNE 2342 TUOLUMNE CA
— 209-929 7XXX8XXX9XXX · 2 holders which blocks → NUSO, LLC 732J STOCKTON CA
— 209-931 not yet reported which blocks → PACIFIC BELL 9740 STOCKTON CA
— 209-932 8XXX9XXX · 2 holders which blocks → PACIFIC BELL 9740 STOCKTON 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.