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
2022-01-13 234-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SEBRING OH
2022-01-13 254-783 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J PROCTOR TX
2022-01-13 254-837 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J EVANT TX
2022-01-13 326-426 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MOWRYSTOWN OH
2022-01-13 331-866 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WHEATON IL
2022-01-13 334-846 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PHENIXCITY AL
2022-01-13 339-466 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORWELL MA
2022-01-13 339-675 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WHITMAN MA
2022-01-13 343-583 not yet reported which blocks → Fibernetics Corporation 464D Enterprise —
2022-01-13 343-584 not yet reported which blocks → Fibernetics Corporation 464D Harrowsmith —
2022-01-13 343-586 not yet reported which blocks → Fibernetics Corporation 464D Inverary —
2022-01-13 343-587 not yet reported which blocks → Fibernetics Corporation 464D Newburgh —
2022-01-13 343-589 not yet reported which blocks → Fibernetics Corporation 464D Odessa —
2022-01-13 343-590 not yet reported which blocks → Fibernetics Corporation 464D Seeleys Bay —
2022-01-13 343-591 not yet reported which blocks → Fibernetics Corporation 464D Selby —
2022-01-13 343-592 not yet reported which blocks → Fibernetics Corporation 464D Tamworth —
2022-01-13 343-593 not yet reported which blocks → Fibernetics Corporation 464D Verona —
2022-01-13 343-595 not yet reported which blocks → Fibernetics Corporation 464D Yarker —
2022-01-13 385-481 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2022-01-13 413-472 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 HOLYOKE MA
2022-01-13 423-832 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J CLINCHPORT TN
2022-01-13 445-235 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PHPHSBZN39 PA
2022-01-13 447-783 0XXX1XXX2XXX3XXX7XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RIDGE FARM IL
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

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.