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 740
FRONTIER NORTH, INC. - OH 123
OHIO BELL TEL CO 105
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 82
AERIAL COMMUNICATIONS, INC. 65
LEVEL 3 COMMUNICATIONS, LLC - OH 63
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
2002-08-16 740-429 0XXX1XXX2XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BEVERLY OH
2002-08-16 740-431 0XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BOWERSTON OH
2002-08-16 740-433 2XXX3XXX5XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CADIZ OH
2002-08-16 740-445 0XXX1XXX5XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BARLOW OH
2002-08-16 740-513 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DELAWARE OH
2002-08-15 740-274 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 ATHENS OH
2002-08-15 740-442 5XXX6XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 IRONTON OH
2002-07-30 740-480 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CENTERBURG OH
2002-07-30 740-481 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DANVL OH
2002-07-30 740-759 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 UTICAHOMER OH
2002-07-16 740-326 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MT VERNON OH
2002-07-16 740-331 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ATHENS OH
2002-07-16 740-370 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PORTSMOUTH OH
2002-07-16 740-414 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 IRONTON OH
2002-06-26 740-249 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 ATHENS OH
2002-06-26 740-270 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LOGAN OH
2002-06-26 740-293 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BARLOW OH
2002-06-26 740-305 1XXX2XXX3XXX5XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CALDWELL OH
2002-06-26 740-308 1XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DEXTERCITY OH
2002-06-26 740-316 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BOWERSTON OH
2002-06-26 740-320 4XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CADIZ OH
2002-06-26 740-410 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BEVERLY OH
2002-06-26 740-413 1XXX2XXX3XXX4XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ASHLEY OH
2002-06-25 740-933 4XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BOWERSTON OH
2002-06-12 740-334 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWARK OH
2002-06-11 740-424 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 STEUBENVL OH
2002-05-23 740-336 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARIETTA OH
2002-04-23 740-212 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F GLENFORD OH
2002-04-23 740-214 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - OH 464C ROSEVILLE OH
2002-04-23 740-217 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OH 464C WALNUT OH
2002-04-23 740-218 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F WOODSFIELD OH
2002-04-23 740-224 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OH 464C GRAYSVILLE OH
2002-04-23 740-240 0–9 XXXall 10 · 9 holders which blocks → ONVOY, LLC - OH 464C RUSHVILLE OH
2002-04-23 740-267 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - OH 464C LEWISVILLE OH
2002-04-23 740-299 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C CLARINGTON OH
2002-04-23 740-301 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 7 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F RIO GRANDE OH
2002-04-23 740-303 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C PHILO OH
2002-04-23 740-306 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - OH 464C GUYAN OH
2002-04-23 740-307 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FIRST COMMUNICATIONS, LLC 460K IRONTON OH
2002-04-23 740-309 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → ONVOY, LLC - OH 464C BARNESVL OH
2002-04-23 740-313 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FIRST COMMUNICATIONS, LLC 460K WSNGTNCTHS OH
2002-04-23 740-315 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BELPRE OH
2002-04-23 740-318 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - OH 464C SUGARGROVE OH
2002-04-23 740-337 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C TORONTO OH
2002-04-23 740-402 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OH 464C CONESVILLE OH
2002-04-23 740-419 0–9 XXXall 10 · 9 holders which blocks → ONVOY, LLC - OH 464C MILLEDGEVL OH
2002-04-23 740-434 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FIRST COMMUNICATIONS, LLC 460K MARIETTA OH
2002-04-23 740-470 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C SEDALIA OH
2002-04-23 740-471 1XXX5XXX7XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BLOOMINGBG OH
2002-04-23 740-488 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C JEFFERSNVL 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.