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
2010-06-23 740-839 3XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STCLAIRSVL OH
2010-06-10 740-692 0–9 XXXall 10 · 8 holders which blocks → GOLDSTAR COMMUNICATIONS, LLC - OH 9133 MARION OH
2010-03-11 740-755 0–9 XXXall 10 · 4 holders which blocks → WINDSTREAM OHIO, LLC 0665 NEWARK OH
2010-03-09 740-616 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWARK OH
2010-02-23 740-688 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 JACKSON OH
2010-02-18 740-722 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COSHOCTON OH
2009-12-04 740-613 0XXX1XXX7XXX · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C BLOOMINGBG OH
2009-09-25 740-648 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAVERLY OH
2009-09-25 740-673 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UHRICHSVL OH
2009-03-23 740-542 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHILLICOTH OH
2008-10-09 740-615 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-09-11 740-883 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BARTLETT OH
2008-09-07 740-641 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWARK OH
2008-08-21 740-529 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K PORTSMOUTH OH
2008-07-28 740-486 0–9 XXXall 10 · 7 holders which blocks → CITYNET OHIO, LLC - OH 036B MCARTHUR OH
2008-05-28 740-637 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CHILLICOTH OH
2008-05-28 740-861 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CHESAPEAKE OH
2008-05-28 740-961 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 PORTSMOUTH OH
2008-04-15 740-938 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 RATHBONE OH
2008-04-04 740-854 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ALBANY OH
2007-12-21 740-885 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 MARIETTA OH
2007-07-27 740-842 2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K STOCKPORT OH
2007-07-27 740-939 9XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K JUNCTIONCY OH
2007-06-28 740-846 1XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K COOLVILLE OH
2007-06-07 740-827 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 STCLAIRSVL OH
2007-04-13 740-523 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E IRONTON OH
2007-03-14 740-451 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E CHESAPEAKE OH
2007-03-14 740-851 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CHILLICOTH OH
2007-02-20 740-538 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARIETTA OH
2007-02-14 740-677 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K THE PLAINS OH
2007-01-31 740-853 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 GALLIPOLIS OH
2006-11-17 740-531 0XXX1XXX2XXX3XXX · 2 holders which blocks → ONVOY, LLC - OH 464C THORNVILLE OH
2006-10-16 740-644 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWARK OH
2006-09-28 740-877 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWARK OH
2006-09-07 740-825 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CAMBRIDGE OH
2006-05-01 740-200 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 KILBOURNE OH
2006-04-27 740-727 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PORTSMOUTH OH
2006-04-27 740-751 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARION OH
2006-04-27 740-856 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ATHENS OH
2006-04-16 740-855 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WELLSTON OH
2006-04-15 740-400 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BALTIMORE OH
2006-04-15 740-561 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K GNADENHTTN OH
2006-02-22 740-675 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 AMANDA OH
2006-02-03 740-876 0–9 XXXall 10 · 4 holders which blocks → TIER 2 COMMUNICATIONS, LLC 8168 PORTSMOUTH OH
2005-11-28 740-801 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CAMBRIDGE OH
2005-09-24 740-920 0–9 XXXall 10 · 9 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K GRANVILLE OH
2005-09-07 740-612 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GALLIPOLIS OH
2005-06-01 740-792 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STEUBENVL OH
2005-03-25 740-619 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J BARNESVL OH
2005-03-01 740-527 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 HEBRON 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.