NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2022-03-01 725-377 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LAS VEGAS NV
2022-03-01 737-321 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 ELGIN TX
2022-03-01 765-972 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FRANKFORT IN
2022-03-01 775-866 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FALLON NV
2022-03-01 825-306 not yet reported which blocks → ISP Telecom Inc. 4727 Crossfield —
2022-03-01 825-309 not yet reported which blocks → ISP Telecom Inc. 4727 Nanton —
2022-03-01 825-336 not yet reported which blocks → ISP Telecom Inc. 4727 Turner Valley —
2022-03-01 825-418 not yet reported which blocks → ISP Telecom Inc. 4727 Vulcan —
2022-03-01 825-569 not yet reported which blocks → ISP Telecom Inc. 4727 Cardston —
2022-03-01 840-216 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA
2022-03-01 856-633 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HADDON HTS NJ
2022-03-01 870-922 0XXX1XXX2XXX3XXX4XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AUGUSTA AR
2022-03-01 870-977 0XXX1XXX2XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BLACKFIHLK AR
2022-03-01 931-727 0XXX1XXX2XXX3XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SEWANEE TN
2022-03-01 931-767 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WINCHESTER TN
2022-03-01 939-377 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CAYEY PR
2022-02-28 213-653 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2022-02-28 218-648 0XXX2XXX3XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PALO MN
2022-02-28 218-696 0XXX1XXX2XXX6XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TOWER MN
2022-02-28 218-767 6XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RANIER MN
2022-02-28 220-225 0XXX1XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F BELPRE OH
2022-02-28 223-543 0XXX3XXX4XXX5XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ST THOMAS PA
2022-02-28 229-579 0–9 XXXall 10 · 5 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 THOMASVL GA
2022-02-28 231-963 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J MCBAIN MI
2022-02-28 240-933 0XXX1XXX3XXX7XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BUCKEYSTN MD
2022-02-28 272-443 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ST CLAIR PA
2022-02-28 313-726 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DETROITZN6 MI
2022-02-28 318-825 0XXX1XXX5XXX6XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WISNER LA
2022-02-28 318-898 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOYCE LA
2022-02-28 318-928 0XXX1XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LECOMPTE LA
2022-02-28 318-937 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GLENMORA LA
2022-02-28 319-966 1XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRANDVIEW IA
2022-02-28 320-889 0XXX1XXX7XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORRIS MN
2022-02-28 341-221 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 HAYWARD CA
2022-02-28 413-673 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GREATBNGTN MA
2022-02-28 430-297 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 MTPLEASANT TX
2022-02-28 442-378 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 FALLBROOK CA
2022-02-28 447-233 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DECATUR IL
2022-02-28 505-746 0XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CHIMAYO NM
2022-02-28 517-746 0XXX1XXX3XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J COLDWATER MI
2022-02-28 562-613 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 NORWALK CA
2022-02-28 575-295 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2022-02-28 586-926 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WASHINGTON MI
2022-02-28 607-526 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ELMIRA NY
2022-02-28 608-880 0XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WITWEN WI
2022-02-28 608-998 8XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J VIOLA WI
2022-02-28 616-373 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ZEELAND MI
2022-02-28 629-462 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SMITHVILLE TN
2022-02-28 641-543 3XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ALTA VISTA IA
2022-02-28 641-966 2XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BLADENSBG IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.