NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
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
2017-09-11 463-333 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D CARMEL IN
2017-09-11 463-444 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - IN 097D GREENWOOD IN
2017-09-11 463-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D MOORESVL IN
2017-09-11 463-888 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D BROWNSBURG IN
2017-09-11 539-525 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J TULSA OK
2017-09-11 608-733 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MADISON WI
2017-09-11 804-718 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → VONAGE AMERICA LLC 197D RICHMOND VA
2017-09-09 340-423 not yet reported which blocks → VITELCOM CELLULAR, INC. 346D CHTAMSTTHS VI
2017-09-09 340-717 not yet reported which blocks → VITELCOM CELLULAR, INC. 346D CHTAMSTTHS VI
2017-09-09 340-725 not yet reported which blocks → VITELCOM CELLULAR, INC. 346D CHTAMSTTHS VI
2017-09-08 204-879 not yet reported which blocks → Provincial Tel Inc. 498E Lorette —
2017-09-08 856-557 0–9 XXXwhole prefix which blocks → BLOCK LINE SYSTEMS, LLC - NJ 835E PITMAN NJ
2017-09-08 867-671 not yet reported which blocks → Ice Wireless Inc. 630G Tuktoyaktuk —
2017-09-08 867-732 not yet reported which blocks → Ice Wireless Inc. 630G Behchoko —
2017-09-08 867-889 not yet reported which blocks → Ice Wireless Inc. 630G Inuvik —
2017-09-08 867-987 not yet reported which blocks → Ice Wireless Inc. 630G Yellowknife —
2017-09-07 205-584 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 BESSEMER AL
2017-09-07 206-536 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E SEATTLE WA
2017-09-07 214-433 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WAXAHACHIE TX
2017-09-07 231-300 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C ALDEN MI
2017-09-07 346-268 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SPRING TX
2017-09-07 346-269 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2017-09-07 346-271 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F FRIENDSWD TX
2017-09-07 417-430 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD MO
2017-09-07 432-999 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C TERMINAL TX
2017-09-07 458-777 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OR 750E JEFFERSON OR
2017-09-07 458-999 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - OR 750E UMATILLA OR
2017-09-07 509-867 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H SPOKANE WA
2017-09-07 639-828 not yet reported which blocks → Bell Mobility 6574 Gravelbourg —
2017-09-07 774-350 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HOPKINTON MA
2017-09-07 778-537 not yet reported which blocks → TELUS 8086 White Rock —
2017-09-06 217-312 0XXX2XXX4XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OWANECO IL
2017-09-06 217-315 0XXX1XXX2XXX4XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WITT IL
2017-09-06 226-917 not yet reported which blocks → Iristel Inc. 154E Orangeville —
2017-09-06 332-201 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2017-09-06 567-260 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F WHARTON OH
2017-09-06 639-389 not yet reported which blocks → Iristel Inc. 154E Davidson —
2017-09-06 778-900 not yet reported which blocks → Iristel Inc. 154E New Westminster —
2017-09-06 838-222 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC- NY 384C PORT HENRY NY
2017-09-06 848-255 0–9 XXXall 10 · 2 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 DUNELLEN NJ
2017-09-06 870-242 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DAISY AR
2017-09-06 870-290 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 DELIGHT AR
2017-09-06 870-306 0XXX1XXX2XXX3XXX4XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 OKOLONA AR
2017-09-06 870-337 0XXX2XXX3XXX4XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 NORMAN AR
2017-09-05 405-984 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ARCADIA OK
2017-09-05 406-308 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 6564 CASCADE MT
2017-09-05 515-364 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → UNITED STATES CELLULAR - IA 6266 GOLDFIELD IA
2017-09-05 743-333 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NC 638E WINSTN SAL NC
2017-09-05 830-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C SEGUIN TX
2017-09-05 838-300 0XXX1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C TUPPERLAKE NY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.