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
2016-04-21 740-744 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHESAPEAKE OH
2016-04-07 740-690 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C GAMBIER OH
2016-03-28 740-564 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 PATASKALA OH
2016-03-14 740-560 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C RIO GRANDE OH
2016-03-14 740-960 0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C MCONNELSVL OH
2016-03-11 740-730 0XXX1XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C TORONTO OH
2016-03-10 740-871 0XXX1XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C GNADENHTTN OH
2015-12-08 740-899 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 NEWARK OH
2015-12-08 740-921 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BELLAIRE OH
2015-07-06 740-728 0XXX2XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 COOLVILLE OH
2015-07-06 740-799 0XXX1XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 QUAKERCITY OH
2015-07-06 740-898 1XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 POWHATANPT OH
2015-07-06 740-955 1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 CUMBERLAND OH
2015-06-25 740-866 0XXX1XXX6XXX9XXX · 4 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 BLOOMINGDL OH
2015-06-12 740-900 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C SOMERSET OH
2015-05-29 740-952 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F UHRICHSVL OH
2015-03-26 740-780 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → CAS COMMUNICATIONS, LLC - OH 380H BELPRE OH
2014-02-06 740-860 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CSC VOICE, LLC 612K BELPRE OH
2013-11-11 740-371 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K MARIETTA OH
2013-11-04 740-691 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → CSC VOICE, LLC 612K POMEROY OH
2013-06-26 740-271 5XXX9XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MINFD SKDL OH
2013-06-18 740-770 0XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FRANKFORT OH
2013-06-18 740-940 0XXX7XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MASSIEVL OH
2013-06-06 740-916 5XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 FAIRVIEW OH
2013-06-05 740-785 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LANCASTER OH
2013-06-03 740-914 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MARION OH
2013-06-03 740-915 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NEWARK OH
2013-05-22 740-771 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CHILLICOTH OH
2013-04-16 740-487 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ZANESVILLE OH
2012-12-21 740-830 0–9 XXXall 10 · 5 holders which blocks → HORIZON SERVICES, INC. - OH 601G MT VERNON OH
2012-12-21 740-870 0–9 XXXall 10 · 6 holders which blocks → HORIZON SERVICES, INC. - OH 601G LANCASTER OH
2012-10-17 740-781 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → HORIZON SERVICES, INC. - OH 601G CAMBRIDGE OH
2012-08-10 740-731 0–9 XXXall 10 · 2 holders which blocks → FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2012-08-01 740-913 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SUNBURY OH
2012-07-05 740-909 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CHESHIRCTR OH
2012-06-20 740-715 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F JUNCTIONCY OH
2012-06-20 740-805 0XXX1XXX2XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F GLOUSTER OH
2012-06-20 740-901 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F LANCASTER OH
2012-05-23 740-760 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F MARIETTA OH
2012-05-02 740-618 0–9 XXXall 10 · 9 holders which blocks → HORIZON SERVICES, INC. - OH 601G NEWARK OH
2012-03-14 740-608 0–9 XXXall 10 · 3 holders which blocks → HORIZON SERVICES, INC. - OH 601G ATHENS OH
2012-03-14 740-716 0–9 XXXall 10 · 4 holders which blocks → HORIZON SERVICES, INC. - OH 601G PORTSMOUTH OH
2012-03-12 740-562 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 ZANESVILLE OH
2012-02-06 740-540 0–9 XXXwhole prefix which blocks → CHILLICOTHE TEL. CO. 0597 CHILLICOTH OH
2011-09-28 740-520 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F ADAMSVILLE OH
2011-09-26 740-300 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F NELSONVL OH
2011-09-07 740-292 0XXX1XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F STOCKPORT OH
2011-03-10 740-868 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J ZANESVILLE OH
2011-02-01 740-800 2XXX7XXX8XXX · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C CARROLL OH
2010-12-09 740-500 0–9 XXXall 10 · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CIRCLEVL 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.