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
2022-01-07 626-635 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 AZUSA CA
2022-01-07 628-283 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2022-01-07 629-272 0XXX1XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F VANLEER TN
2022-01-07 650-671 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2022-01-07 657-536 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-01-07 657-542 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2022-01-07 657-545 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2022-01-07 657-548 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WESTMINSTR CA
2022-01-07 662-926 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLEVELAND MS
2022-01-07 680-238 0XXX1XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J MORAVIA NY
2022-01-07 682-538 0XXX1XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KELLER TX
2022-01-07 727-506 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2022-01-07 743-626 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LEXINGTON NC
2022-01-07 743-727 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOONVILLE NC
2022-01-07 747-321 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SNFN PACM CA
2022-01-07 747-367 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRBN BRBN CA
2022-01-07 765-837 0XXX1XXX4XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DELPHI IN
2022-01-07 765-926 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KOKOMO IN
2022-01-07 779-837 0XXX1XXX2XXX3XXX4XXX5XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ELWOOD IL
2022-01-07 839-213 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J COLUMBIA SC
2022-01-07 854-768 0XXX1XXX3XXX6XXX7XXX8XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EDISTO IS SC
2022-01-07 857-767 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOSTON MA
2022-01-07 862-783 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORRISTOWN NJ
2022-01-07 863-319 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 AVON PARK FL
2022-01-07 901-659 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MEMPHIS TN
2022-01-07 904-767 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 JACKSONVL FL
2022-01-07 925-546 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WALNUT CRK CA
2022-01-07 928-464 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 WICKENBURG AZ
2022-01-07 928-469 0XXX1XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PARKER AZ
2022-01-07 929-746 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NWYRCYZN04 NY
2022-01-07 929-763 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NWYRCYZN03 NY
2022-01-07 929-823 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NWYRCYZN09 NY
2022-01-07 929-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NWYRCYZN08 NY
2022-01-07 930-256 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NEW ALBANY IN
2022-01-07 930-837 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GALENA IN
2022-01-07 938-206 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ANNISTON AL
2022-01-07 945-322 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DE SOTO TX
2022-01-07 945-837 0XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DLFTWTARPT TX
2022-01-07 947-426 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOUTHFIELD MI
2022-01-07 947-837 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J W BLOOMFLD MI
2022-01-07 959-832 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEWBRITAIN CT
2022-01-07 985-352 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J COVINGTON LA
2022-01-07 985-469 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RACELAND LA
2022-01-06 224-768 2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAKEFOREST IL
2022-01-06 260-292 0XXX7XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F ST JOE IN
2022-01-06 326-685 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FAIRBORN OH
2022-01-06 343-668 not yet reported which blocks → Fibernetics Corporation 464D Alexandria —
2022-01-06 343-669 not yet reported which blocks → Fibernetics Corporation 464D Avonmore —
2022-01-06 343-670 not yet reported which blocks → Fibernetics Corporation 464D Finch —
2022-01-06 343-671 not yet reported which blocks → Fibernetics Corporation 464D Glen Robertson —

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.