NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
2020-06-26 309-615 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J PEORIA IL
2020-06-26 386-285 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J DAYTONABCH FL
2020-06-26 432-298 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → 1ST POINT COMMUNICATIONS, LLC 489J IRAAN TX
2020-06-26 432-303 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → 1ST POINT COMMUNICATIONS, LLC 489J VALENTINE TX
2020-06-26 434-235 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J CHARLOTSVL VA
2020-06-26 479-480 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F FAYETTEVL AR
2020-06-26 479-579 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AR 348F BENTONVL AR
2020-06-26 502-764 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - KY 8406 FRANKFORT KY
2020-06-26 574-352 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J ELKHART IN
2020-06-26 579-572 not yet reported which blocks → Fibernetics Corporation 464D Marieville —
2020-06-26 579-573 not yet reported which blocks → Fibernetics Corporation 464D Varennes —
2020-06-26 579-847 not yet reported which blocks → TELUS Quebec 2243 Chomedey —
2020-06-26 680-223 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 AUBURN NY
2020-06-26 737-270 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J AUSTIN TX
2020-06-26 765-440 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J LAFAYETTE IN
2020-06-26 779-274 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J ROCKFORD IL
2020-06-26 850-824 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J PENSACOLA FL
2020-06-26 850-825 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J TALLAHASSE FL
2020-06-26 864-664 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - SC 548E HONEA PATH SC
2020-06-26 864-863 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - SC 548E GAFFNEY SC
2020-06-26 904-597 0–9 XXXall 10 · 2 holders which blocks → CSC WIRELESS, LLC 425J JACKSONVL FL
2020-06-26 910-921 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ROCKINGHAM NC
2020-06-26 925-450 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E ECONTRCOST CA
2020-06-26 930-214 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → CSC WIRELESS, LLC 425J EVANSVILLE IN
2020-06-26 930-215 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J BLOOMINGTN IN
2020-06-26 984-666 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H DURHAM NC
2020-06-25 352-659 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J OCALA FL
2020-06-25 430-274 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TEXARKANA TX
2020-06-25 480-780 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2020-06-25 517-216 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J LANSING MI
2020-06-25 579-570 not yet reported which blocks → Fibernetics Corporation 464D Cowansville —
2020-06-25 579-571 not yet reported which blocks → Fibernetics Corporation 464D Knowlton —
2020-06-25 602-780 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H PHOENIX AZ
2020-06-25 616-276 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → CSC WIRELESS, LLC 425J ALTO MI
2020-06-25 681-326 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PRKRSBGZN1 WV
2020-06-25 850-823 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 PENSACOLA FL
2020-06-25 873-874 not yet reported which blocks → Fibernetics Corporation 464D Aylmer —
2020-06-25 873-875 not yet reported which blocks → Fibernetics Corporation 464D Buckingham —
2020-06-25 906-210 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CSC WIRELESS, LLC 425J MARQUETTE MI
2020-06-25 947-224 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J SOUTHFIELD MI
2020-06-25 989-318 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J BAY CITY MI
2020-06-24 202-773 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 551G WSHNGTNZN1 DC
2020-06-24 269-256 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C MARSHALL MI
2020-06-24 386-284 0–9 XXXall 10 · 3 holders which blocks → 1ST POINT COMMUNICATIONS, LLC 489J JASPER FL
2020-06-24 445-223 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHLDLPHZN1 PA
2020-06-24 501-430 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BENTON AR
2020-06-24 513-669 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F LTL MIAMI OH
2020-06-24 616-612 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C GRANDHAVEN MI
2020-06-24 909-619 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E S BERNDINO CA
2020-06-24 912-469 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HINESVILLE GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.