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
2005-02-24 740-848 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 FREDERCKTN OH
2005-02-03 740-281 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 NEWARK OH
2004-12-13 740-882 2XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CUMBERLAND OH
2004-10-01 740-936 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SUNBURY OH
2004-08-30 740-954 0–9 XXXall 10 · 8 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 ASHVILLE OH
2004-07-30 740-440 2XXX3XXX4XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTLHOCKING OH
2004-07-30 740-510 1XXX2XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 FAIRVIEW OH
2004-06-28 740-469 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CROOKSVL OH
2004-05-20 740-931 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 CHESHIRCTR OH
2004-05-10 740-917 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 RATHBONE OH
2004-05-03 740-791 0XXX1XXX2XXX4XXX7XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MARTINSBG OH
2004-04-30 740-918 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LANCASTER OH
2004-04-30 740-919 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PATASKALA OH
2004-04-30 740-932 0–9 XXXall 10 · 8 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K OAK HILL OH
2004-04-22 740-341 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARION OH
2004-04-01 740-624 4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ZANESVILLE OH
2004-03-17 740-241 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BYESVILLE OH
2004-03-17 740-565 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DRESDEN OH
2004-03-05 740-430 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J BLOOMINGBG OH
2004-03-05 740-460 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → PAETEC ITEL, LLC 829J CORNING OH
2004-03-05 740-476 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J CONESVILLE OH
2004-03-05 740-519 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J CLARINGTON OH
2004-03-05 740-521 0XXX1XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J DRESDEN OH
2004-02-20 740-990 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 DELAWARE OH
2004-01-12 740-461 2XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 STEUBENVL OH
2003-08-22 740-508 2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 POMEROY OH
2003-08-22 740-509 4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CALDWELL OH
2003-08-08 740-213 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WOODSFIELD OH
2003-08-08 740-238 4XXX5XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BETHESDA OH
2003-07-07 740-491 4XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CADIZ OH
2003-06-03 740-478 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LAURELVL OH
2002-11-24 740-466 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHILLICOTH OH
2002-11-13 740-262 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARION OH
2002-09-20 740-260 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CAMBRIDGE OH
2002-09-17 740-294 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J COSHOCTON OH
2002-09-16 740-464 6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTSMOUTH OH
2002-09-11 740-462 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MT VERNON OH
2002-09-11 740-485 6XXX7XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MT VERNON OH
2002-09-10 740-416 6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POMEROY OH
2002-09-10 740-418 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON OH
2002-08-22 740-436 4XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RICHWOOD OH
2002-08-16 740-235 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEVADA OH
2002-08-16 740-261 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEWCONCORD OH
2002-08-16 740-265 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DEXTERCITY OH
2002-08-16 740-268 0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 RICHWOOD OH
2002-08-16 740-273 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WILLIAMSPT OH
2002-08-16 740-279 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LOGAN OH
2002-08-16 740-287 0XXX1XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ASHLEY OH
2002-08-16 740-365 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CALDWELL OH
2002-08-16 740-421 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CAMBRIDGE 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.