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
2017-10-05 970-666 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - CO 026D FT COLLINS CO
2017-10-04 269-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C KALAMAZOO MI
2017-10-04 346-278 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANVEL TX
2017-10-04 365-604 not yet reported which blocks → Iristel Inc. 154E Oakville —
2017-10-04 581-204 not yet reported which blocks → Iristel Inc. 154E Alma —
2017-10-04 581-707 not yet reported which blocks → Iristel Inc. 154E Quebec —
2017-10-04 581-708 not yet reported which blocks → Iristel Inc. 154E Chicoutimi —
2017-10-04 581-808 not yet reported which blocks → Iristel Inc. 154E St-Tite-des-Caps —
2017-10-04 608-653 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J VERONA WI
2017-10-04 608-899 0XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WOODMAN WI
2017-10-04 616-600 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
2017-10-04 628-250 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2017-10-04 639-388 not yet reported which blocks → Iristel Inc. 154E Rosthern —
2017-10-04 647-803 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-10-04 647-804 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-10-04 647-806 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-10-04 719-259 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CO 026D COLORDOSPG CO
2017-10-04 757-600 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E NRFOLKZON2 VA
2017-10-04 814-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E NORTH EAST PA
2017-10-04 828-679 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HICKORY NC
2017-10-04 859-666 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - KY 896E WILLIAMSTN KY
2017-10-04 910-593 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 LUMBERTON NC
2017-10-04 912-400 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BRUNSWICK GA
2017-10-03 214-885 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2017-10-03 262-218 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WIND LAKE WI
2017-10-03 346-275 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C HSTNSUBURB TX
2017-10-03 346-277 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 SATSUMA TX
2017-10-03 365-603 not yet reported which blocks → Iristel Inc. 154E Niagara Falls —
2017-10-03 424-410 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN MRVS CA
2017-10-03 438-790 not yet reported which blocks → Iristel Inc. 154E Montreal —
2017-10-03 438-791 not yet reported which blocks → Iristel Inc. 154E Montreal —
2017-10-03 470-698 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J ATLANTA GA
2017-10-03 540-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E ROANOKE VA
2017-10-03 575-500 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - NM 206F ROSWELL NM
2017-10-03 619-612 0–9 XXXall 10 · 5 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L HARBSNALPN CA
2017-10-03 626-418 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ALHAMBRA CA
2017-10-03 629-214 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F FRANKLIN TN
2017-10-03 775-900 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NV 029F RENO NV
2017-10-03 779-666 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C ROCKFORD IL
2017-10-03 803-855 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ORANGEBURG SC
2017-10-03 858-302 0–9 XXXall 10 · 7 holders which blocks → COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2017-10-03 865-666 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TN 525E KNOXVILLE TN
2017-10-03 865-800 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TN 525E MASCOT TN
2017-10-03 920-409 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J JOHNSONCRK WI
2017-10-03 940-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C DENTON TX
2017-10-03 941-500 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C SARASOTA FL
2017-10-03 959-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C HARTFORD CT
2017-10-03 970-783 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 GRAND JCT CO
2017-10-02 231-800 0XXX2XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C LUTHER MI
2017-10-02 249-363 not yet reported which blocks → ExaTEL Inc. 3147 Hearst —

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.