NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 21
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
2022-01-10 605-746 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J PLATTE SD
2022-01-10 628-278 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC MT-EV CA
2022-01-10 650-519 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2022-01-10 650-541 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2022-01-10 650-547 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 WOODSIDE CA
2022-01-10 657-540 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2022-01-10 657-543 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SANTA ANA CA
2022-01-10 657-546 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-01-10 657-837 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BUENA PARK CA
2022-01-10 660-270 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLINTON MO
2022-01-10 669-308 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNJS NORTH CA
2022-01-10 669-437 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORGANHILL CA
2022-01-10 682-371 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
2022-01-10 689-268 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WINTERGRDN FL
2022-01-10 719-408 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F LIMON CO
2022-01-10 719-409 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F CALHAN CO
2022-01-10 720-654 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2022-01-10 743-221 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E MULBERRY NC
2022-01-10 747-327 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C VAN NUYS CA
2022-01-10 747-466 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NO HOLLYWD CA
2022-01-10 747-746 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RESEDA CA
2022-01-10 747-836 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORTHRIDGE CA
2022-01-10 771-200 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2022-01-10 782-541 not yet reported which blocks → Bell Mobility Aliant 329A Summerside —
2022-01-10 804-670 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 HOPEWELL VA
2022-01-10 820-837 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OXNARD CA
2022-01-10 828-203 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ASHEVILLE NC
2022-01-10 831-837 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SALINAS CA
2022-01-10 840-837 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J POMONA CA
2022-01-10 878-626 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PTTSBGZON7 PA
2022-01-10 878-723 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PTTSBGZON3 PA
2022-01-10 878-786 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GREENSBURG PA
2022-01-10 878-834 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PTTSBGZON8 PA
2022-01-10 928-546 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BULLHEADCY AZ
2022-01-10 945-426 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PLANO TX
2022-01-10 945-435 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ENNIS TX
2022-01-10 945-527 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MCKINNEY TX
2022-01-10 945-536 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRANDPRARI TX
2022-01-10 945-546 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ROCKWALL TX
2022-01-10 947-243 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TROY MI
2022-01-10 949-832 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SADLBK VLY CA
2022-01-10 959-244 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CT 639C FARMINGTON CT
2022-01-10 959-588 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NIANTIC CT
2022-01-10 959-625 0XXX1XXX2XXX5XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLINTON CT
2022-01-10 959-746 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OLD SAYBRK CT
2022-01-10 959-916 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J THOMASTON CT
2022-01-10 959-933 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WINSTED CT
2022-01-10 986-218 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID 6565 HORSEHBEND ID
2022-01-10 989-897 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BAY CITY MI
2022-01-09 272-837 0XXX1XXX2XXX3XXX4XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TROY PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.