NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
— 440-877 2XXX3XXX6XXX7XXX8XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 NOROYALTON OH
— 440-878 not yet reported which blocks → OHIO BELL TEL CO 9321 STRONGSVL OH
— 440-879 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 STRONGSVL OH
— 440-882 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 VICTORY OH
— 440-884 not yet reported which blocks → OHIO BELL TEL CO 9321 VICTORY OH
— 440-885 not yet reported which blocks → OHIO BELL TEL CO 9321 VICTORY OH
— 440-886 9XXX which blocks → OHIO BELL TEL CO 9321 VICTORY OH
— 440-887 3XXX5XXX which blocks → OHIO BELL TEL CO 9321 VICTORY OH
— 440-888 not yet reported which blocks → OHIO BELL TEL CO 9321 VICTORY OH
— 440-891 not yet reported which blocks → OHIO BELL TEL CO 9321 BEREA OH
— 440-892 not yet reported which blocks → OHIO BELL TEL CO 9321 TRINITY OH
— 440-893 2XXX3XXX5XXX7XXX8XXX which blocks → OHIO BELL TEL CO 9321 CHAGRINFLS OH
— 440-895 7XXX which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
— 440-897 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WILLOUGHBY OH
— 440-899 not yet reported which blocks → OHIO BELL TEL CO 9321 TRINITY OH
— 440-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 440-914 2XXX5XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 CHAGRINFLS OH
— 440-915 0XXX which blocks → T-MOBILE USA, INC. 6529 BEREA OH
— 440-918 not yet reported which blocks → OHIO BELL TEL CO 9321 WILLOUGHBY OH
— 440-919 4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J HILLCREST OH
— 440-922 2XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 BRECKSVL OH
— 440-925 4XXX5XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 TRINITY OH
— 440-926 5XXX6XXX7XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 GRAFTON OH
— 440-930 not yet reported which blocks → BRIGHTSPEED OF OHIO, LLC 0630 AVON LAKE OH
— 440-933 not yet reported which blocks → BRIGHTSPEED OF OHIO, LLC 0630 AVON LAKE OH
— 440-934 not yet reported which blocks → BRIGHTSPEED OF OHIO, LLC 0630 AVON OH
— 440-935 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 OBERLIN OH
— 440-937 8XXX which blocks → BRIGHTSPEED OF OHIO, LLC 0630 AVON OH
— 440-940 1XXX2XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GATESMILLS OH
— 440-942 not yet reported which blocks → OHIO BELL TEL CO 9321 WILLOUGHBY OH
— 440-943 not yet reported which blocks → OHIO BELL TEL CO 9321 WICKLIFFE OH
— 440-944 not yet reported which blocks → OHIO BELL TEL CO 9321 WICKLIFFE OH
— 440-945 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BEDFORD OH
— 440-946 not yet reported which blocks → OHIO BELL TEL CO 9321 WILLOUGHBY OH
— 440-947 3XXX4XXX6XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 HILLCREST OH
— 440-949 0XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF OHIO, LLC 0630 LORAIN OH
— 440-950 not yet reported which blocks → OH
— 440-951 not yet reported which blocks → OHIO BELL TEL CO 9321 WILLOUGHBY OH
— 440-953 not yet reported which blocks → OHIO BELL TEL CO 9321 WILLOUGHBY OH
— 440-954 0XXX1XXX2XXX4XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 WILLOUGHBY OH
— 440-958 not yet reported which blocks → OH
— 440-959 not yet reported which blocks → OH
— 440-960 not yet reported which blocks → BRIGHTSPEED OF OHIO, LLC 0630 LORAIN OH
— 440-962 not yet reported which blocks → OHIO BELL TEL CO 9321 TRINITY OH
— 440-963 3XXX7XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF OHIO, LLC 0630 VERMILION OH
— 440-964 not yet reported which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 ASHTABULA OH
— 440-965 0XXX1XXX2XXX3XXX6XXX9XXX · 6 holders which blocks → BRIGHTSPEED OF OHIO, LLC 0630 BIRMINGHAM OH
— 440-967 not yet reported which blocks → BRIGHTSPEED OF OHIO, LLC 0630 VERMILION OH
— 440-968 1XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 MONTVILLE OH
— 440-969 0XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 ASHTABULA OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.