NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, all time — NPA 440
OHIO BELL TEL CO 124
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 115
LEVEL 3 COMMUNICATIONS, LLC - OH 68
T-MOBILE USA, INC. 62
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 52
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
— 440-260 not yet reported which blocks → OHIO BELL TEL CO 9321 BEREA OH
— 440-262 0XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 BRECKSVL OH
— 440-263 none assigned yet which blocks → T-MOBILE USA, INC. 6529 BEREA OH
— 440-264 0XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 CHAGRINFLS OH
— 440-265 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CONNEAUT OH
— 440-266 3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 MENTOR OH
— 440-268 1XXX6XXX8XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 STRONGSVL OH
— 440-269 0XXX5XXX9XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 WILLOUGHBY OH
— 440-270 not yet reported which blocks → SPOK, INC. 6630 WILLOUGHBY OH
— 440-272 not yet reported which blocks → HANSON COMMUNICATIONS OF OHIO, LLC-ORWELL 0649 WINDSOR OH
— 440-273 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BURTON OH
— 440-274 5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J BEREA OH
— 440-275 5XXX which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 AUSTINBURG OH
— 440-277 not yet reported which blocks → BRIGHTSPEED OF OHIO, LLC 0630 LORAIN OH
— 440-279 3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 CHARDON OH
— 440-280 0XXX1XXX2XXX · 2 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 PERRY OH
— 440-281 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELYRIA OH
— 440-282 not yet reported which blocks → BRIGHTSPEED OF OHIO, LLC 0630 LORAIN OH
— 440-283 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J WILLOUGHBY OH
— 440-284 not yet reported which blocks → WINDSTREAM OHIO, LLC 0665 ELYRIA OH
— 440-285 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 CHARDON OH
— 440-286 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 CHARDON OH
— 440-287 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J CHAGRINFLS OH
— 440-288 not yet reported which blocks → BRIGHTSPEED OF OHIO, LLC 0630 LORAIN OH
— 440-289 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WILLOUGHBY OH
— 440-290 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MENTOR OH
— 440-291 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AUSTINBURG OH
— 440-292 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J VICTORY OH
— 440-293 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 ANDOVER OH
— 440-294 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 NEW LYME OH
— 440-295 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J WICKLIFFE OH
— 440-297 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 BEREA OH
— 440-298 2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 THOMPSON OH
— 440-299 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MENTOR OH
— 440-301 not yet reported which blocks → SPOK, INC. 6630 WILLOUGHBY OH
— 440-302 not yet reported which blocks → SPOK, INC. 6630 WILLOUGHBY OH
— 440-303 not yet reported which blocks → SPOK, INC. 6630 WILLOUGHBY OH
— 440-304 not yet reported which blocks → SPOK, INC. 6630 WILLOUGHBY OH
— 440-306 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 WILLOUGHBY OH
— 440-309 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM OHIO, LLC 0665 ELYRIA OH
— 440-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 440-322 not yet reported which blocks → WINDSTREAM OHIO, LLC 0665 ELYRIA OH
— 440-323 not yet reported which blocks → WINDSTREAM OHIO, LLC 0665 ELYRIA OH
— 440-324 not yet reported which blocks → WINDSTREAM OHIO, LLC 0665 ELYRIA OH
— 440-325 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BEREA OH
— 440-326 not yet reported which blocks → WINDSTREAM OHIO, LLC 0665 ELYRIA OH
— 440-327 not yet reported which blocks → WINDSTREAM OHIO, LLC 0665 ELYRIA OH
— 440-328 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → WINDSTREAM OHIO, LLC 0665 ELYRIA OH
— 440-329 not yet reported which blocks → WINDSTREAM OHIO, LLC 0665 ELYRIA OH
— 440-331 not yet reported which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.