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 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
— 740-483 0XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 DUFFY OH
— 740-484 2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → OHIO BELL TEL CO 9321 BETHESDA OH
— 740-489 6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 OLDWSHNGTN OH
— 740-490 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J LONDON OH
— 740-492 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 NEWCOMRSTN OH
— 740-493 0XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 IDAHO OH
— 740-494 0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 PROSPECT OH
— 740-495 0XXX1XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → OHIO BELL TEL CO 9321 NEWHOLLAND OH
— 740-496 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 HARPSTER OH
— 740-498 0XXX1XXX2XXX3XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 NEWCOMRSTN OH
— 740-499 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 LA RUE OH
— 740-501 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MT VERNON OH
— 740-502 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 COSHOCTON OH
— 740-503 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LANCASTER OH
— 740-504 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MT VERNON OH
— 740-505 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WSNGTNCTHS OH
— 740-506 8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LONDON OH
— 740-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 740-512 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 STEUBENVL OH
— 740-516 7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARIETTA OH
— 740-517 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ATHENS OH
— 740-522 not yet reported which blocks → WINDSTREAM OHIO, LLC 0665 NEWARK OH
— 740-524 7XXX8XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 KILBOURNE OH
— 740-525 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARIETTA OH
— 740-526 1XXX2XXX3XXX5XXX6XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 STCLAIRSVL OH
— 740-528 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER NORTH, INC. - OH 0615 GREEN CAMP OH
— 740-532 not yet reported which blocks → OHIO BELL TEL CO 9321 IRONTON OH
— 740-533 none assigned yet which blocks → OHIO BELL TEL CO 9321 IRONTON OH
— 740-534 1XXX8XXX · 2 holders which blocks → OHIO BELL TEL CO 9321 IRONTON OH
— 740-535 3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 MINGO JCT OH
— 740-536 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → OHIO BELL TEL CO 9321 RUSHVILLE OH
— 740-537 0XXX7XXX8XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 TORONTO OH
— 740-541 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ATHENS OH
— 740-543 6XXX7XXX9XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 AMSTERDAM OH
— 740-544 1XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 KNOXVILLE OH
— 740-545 8XXX which blocks → OHIO BELL TEL CO 9321 WLAFAYETTE OH
— 740-546 1XXX2XXX5XXX6XXX7XXX · 5 holders which blocks → FRONTIER NORTH, INC. - OH 0615 ADENA OH
— 740-547 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 IRONTON OH
— 740-548 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 CHESHIRCTR OH
— 740-549 not yet reported which blocks → FRONTIER NORTH, INC. - OH 0615 CHESHIRCTR OH
— 740-550 none assigned yet which blocks → METROPCS, INC. 5562 IRONTON OH
— 740-551 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 BARTLETT OH
— 740-552 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COSHOCTON OH
— 740-553 not yet reported which blocks → SPOK, INC. 6630 COSHOCTON OH
— 740-554 1XXX4XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 CHESTERHL OH
— 740-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST OH
— 740-557 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 PENNSVILLE OH
— 740-558 1XXX6XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 REINELHKNY OH
— 740-559 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST OHIO, INC. 0661 STOCKPORT OH
— 740-566 1XXX2XXX3XXX5XXX · 3 holders which blocks → FRONTIER NORTH, INC. - OH 0615 ATHENS 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.