NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2010-01-12 302-396 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 GEORGETOWN DE
2010-01-12 304-966 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 PRKRSBGZN1 WV
2010-01-12 309-603 0–9 XXXall 10 · 6 holders which blocks → MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CHILLICOTH IL
2010-01-12 361-416 0XXX1XXX6XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PT ARANSAS TX
2010-01-12 361-667 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FALFURRIAS TX
2010-01-12 361-800 0–9 XXXall 10 · 3 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D C CHRISTI TX
2010-01-12 430-777 0XXX2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → EVOLVE CELLULAR, INC. 139F TROUP TX
2010-01-12 430-888 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → EVOLVE CELLULAR, INC. 139F MONTALBA TX
2010-01-12 480-532 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2010-01-12 570-492 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 SUNBURY PA
2010-01-12 570-560 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WILLIAMSPT PA
2010-01-12 801-946 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2010-01-12 806-303 0XXX1XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → CEBRIDGE TELECOM TX , L.P. - TX 318C POST TX
2010-01-12 830-666 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 4 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D SEGUIN TX
2010-01-12 830-667 7XXX8XXX · 2 holders which blocks → EVOLVE CELLULAR, INC. 139F FOWLERTON TX
2010-01-12 850-503 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 PENSACOLA FL
2010-01-12 903-401 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PARIS TX
2010-01-12 903-999 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D MARTINS ML TX
2010-01-12 936-888 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → EVOLVE CELLULAR, INC. 139F HUDSON TX
2010-01-12 936-999 0XXX3XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → EVOLVE CELLULAR, INC. 139F ZAVALLA TX
2010-01-12 940-777 0–9 XXXall 10 · 5 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D SANGER TX
2010-01-12 940-999 0–9 XXXall 10 · 6 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D DENTON TX
2010-01-12 956-999 0–9 XXXall 10 · 4 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D LAREDO TX
2010-01-12 979-444 0XXX4XXX · 2 holders which blocks → EVOLVE CELLULAR, INC. 139F CARMINE TX
2010-01-12 979-888 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C ANGLETON TX
2010-01-11 302-319 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2010-01-11 409-237 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 NDLDPTNCHS TX
2010-01-11 432-250 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 TERMINAL TX
2010-01-11 480-253 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF ARIZONA, LLC - AZ 7552 PHOENIX AZ
2010-01-11 505-635 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 FARMINGTON NM
2010-01-11 512-359 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 LOCKHART TX
2010-01-11 608-736 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C EVANSVILLE WI
2010-01-11 615-894 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C OLDHICKORY TN
2010-01-11 615-946 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 NASHVILLE TN
2010-01-11 720-388 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2010-01-11 732-703 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 TOMS RIVER NJ
2010-01-11 806-429 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 PLAINVIEW TX
2010-01-11 806-464 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 BORGER TX
2010-01-11 817-402 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 ALVARADO TX
2010-01-11 817-863 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2010-01-11 830-335 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 EAGLE PASS TX
2010-01-11 832-278 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RICHMNRNBG TX
2010-01-11 901-305 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MEMPHIS TN
2010-01-11 920-877 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C HORTONVL WI
2010-01-11 956-294 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 MERCEDES TX
2010-01-11 985-273 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 COVINGTON LA
2010-01-08 217-282 0–9 XXXall 10 · 3 holders which blocks → MCC TELEPHONY LLC 593K RANTOUL IL
2010-01-08 217-292 0–9 XXXall 10 · 3 holders which blocks → MCC TELEPHONY LLC 593K SULLIVAN IL
2010-01-08 347-640 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN04 NY
2010-01-08 405-657 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EDMOND OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.