NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2020-05-12 516-980 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN03 NY
2020-05-12 516-990 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C NASSAUZN07 NY
2020-05-12 540-880 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - VA 138E BROWNSBURG VA
2020-05-12 571-601 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E LEESBURG VA
2020-05-12 585-566 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C BLISS NY
2020-05-12 585-580 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C ANGELICA NY
2020-05-12 585-601 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC- NY 384C HENRIETTA NY
2020-05-12 631-540 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC- NY 384C MATTITUCK NY
2020-05-12 681-294 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HNTNGTNZN1 WV
2020-05-12 804-570 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - VA 138E CARTERSVL VA
2020-05-12 929-930 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN03 NY
2020-05-11 205-827 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AL 604E FLATWOOD AL
2020-05-11 216-859 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CLEVELAND OH
2020-05-11 226-554 not yet reported which blocks → Fibernetics Corporation 464D Hillsburgh —
2020-05-11 226-612 not yet reported which blocks → Fibernetics Corporation 464D Caledon —
2020-05-11 226-613 not yet reported which blocks → Fibernetics Corporation 464D Elora —
2020-05-11 226-614 not yet reported which blocks → Fibernetics Corporation 464D Erin —
2020-05-11 226-615 not yet reported which blocks → Fibernetics Corporation 464D Shelburne —
2020-05-11 234-272 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F ROGERS OH
2020-05-11 234-273 0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F LEETONIA OH
2020-05-11 365-747 not yet reported which blocks → TELUS Integrated Communications 2782 Brampton —
2020-05-11 434-998 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E APPOMATTOX VA
2020-05-11 506-973 not yet reported which blocks → TELUS Integrated Communications 2782 Moncton —
2020-05-11 520-479 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 TUCSON AZ
2020-05-11 540-202 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E THE PLAINS VA
2020-05-11 571-520 0–9 XXXwhole prefix which blocks → ONVOY, LLC - VA 138E HERNDON VA
2020-05-11 571-771 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E WSNGTNZN08 VA
2020-05-11 657-437 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2020-05-11 657-488 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2020-05-11 659-569 0XXX1XXX5XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - AL 604E LYNN AL
2020-05-11 659-596 0XXX3XXX4XXX5XXX · 2 holders which blocks → ONVOY, LLC - AL 604E NEEDHAM AL
2020-05-11 719-509 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CO 026D TRINIDAD CO
2020-05-11 720-734 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D DENVER CO
2020-05-11 725-234 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F INDIAN SPG NV
2020-05-11 775-454 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NV 029F BEATTY NV
2020-05-11 775-456 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - NV 029F EMPIRE NV
2020-05-11 804-534 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - VA 138E HEATHSVL VA
2020-05-11 845-801 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E MIDDLETOWN NY
2020-05-11 928-360 0XXX1XXX · 2 holders which blocks → COMMNET WIRELESS, LLC 5736 CHINLE AZ
2020-05-08 240-995 1XXX2XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - MD 876D FLINTSTONE MD
2020-05-08 276-246 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E BIGSTONEGP VA
2020-05-08 339-300 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H COHASSET MA
2020-05-08 339-356 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H HULL MA
2020-05-08 339-400 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SAUGUS MA
2020-05-08 339-529 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H WHITMAN MA
2020-05-08 351-400 0XXX2XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H ESSEX MA
2020-05-08 351-500 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LOWELL MA
2020-05-08 351-529 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MERRIMAC MA
2020-05-08 351-600 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H PEABODY MA
2020-05-08 351-800 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WINCHENDON MA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.