NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
2022-01-13 463-362 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BARGERSVL IN
2022-01-13 475-327 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MILFORD CT
2022-01-13 475-426 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RIDGEFIELD CT
2022-01-13 475-466 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MADISON CT
2022-01-13 475-887 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WESTPORT CT
2022-01-13 480-853 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-01-13 501-832 0XXX1XXX2XXX4XXX5XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GREERSFRRY AR
2022-01-13 501-866 2XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CASA AR
2022-01-13 539-546 3XXX which blocks → TON80 COMMUNICATIONS, LLC 516J BURBANK OK
2022-01-13 539-837 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J AGRA OK
2022-01-13 563-453 4XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ELKADER IA
2022-01-13 563-832 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J GARNAVILLO IA
2022-01-13 567-374 7XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PANDORA OH
2022-01-13 567-426 0XXX3XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PAYNE OH
2022-01-13 567-466 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J COONEY OH
2022-01-13 567-468 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J YORKSHIRE OH
2022-01-13 567-475 0XXX1XXX6XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WHITEHOUSE OH
2022-01-13 567-746 0XXX2XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BELLEVUE OH
2022-01-13 567-837 0XXX1XXX4XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RAWSON OH
2022-01-13 573-926 0XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 LOUISIANA MO
2022-01-13 574-663 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MIDDLEBURY IN
2022-01-13 574-746 2XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DUNLAP IN
2022-01-13 574-764 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J BURKET IN
2022-01-13 574-783 3XXX6XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LUCERNE IN
2022-01-13 585-887 0XXX2XXX3XXX6XXX7XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LIVONIA NY
2022-01-13 603-825 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MANCHESTER NH
2022-01-13 605-634 0XXX1XXX2XXX3XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CAVOUR SD
2022-01-13 605-752 9XXX which blocks → TON80 COMMUNICATIONS, LLC 516J FTTHOMPSON SD
2022-01-13 620-942 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J ATLANTA KS
2022-01-13 623-281 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-01-13 629-274 0XXX2XXX6XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NSPRINGHIL TN
2022-01-13 629-324 0XXX1XXX2XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EASTSANGO TN
2022-01-13 629-366 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LEBANON TN
2022-01-13 629-463 0XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WATERTOWN TN
2022-01-13 629-466 3XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BETHPAGE TN
2022-01-13 629-832 4XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WESTMORELD TN
2022-01-13 641-517 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 OSKALOOSA IA
2022-01-13 657-550 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-01-13 657-554 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FULLERTON CA
2022-01-13 657-639 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2022-01-13 667-824 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EDGEWOOD MD
2022-01-13 719-737 0XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CAMPO CO
2022-01-13 719-762 0XXX1XXX2XXX4XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRISTOGRND CO
2022-01-13 719-998 0XXX2XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CHERAW CO
2022-01-13 725-344 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SANDY VLY NV
2022-01-13 737-746 0XXX1XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BERTRAM TX
2022-01-13 743-322 2XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FARMER NC
2022-01-13 743-353 1XXX3XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PISGAH NC
2022-01-13 743-583 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J CHURCHLAND NC
2022-01-13 743-586 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J JACKSONCRK NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.