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
2002-04-23 740-518 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C DRESDEN OH
2002-04-23 740-530 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C DUFFY OH
2002-04-23 740-539 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → FIRST COMMUNICATIONS, LLC 460K LANCASTER OH
2002-04-23 740-563 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C MINGO JCT OH
2002-04-23 740-580 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - OH 464C SHAWNEE OH
2002-04-23 740-610 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FIRST COMMUNICATIONS, LLC 460K COSHOCTON OH
2002-04-23 740-660 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OH 464C ARABIA OH
2002-04-23 740-661 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C FULTONHAM OH
2002-04-23 740-693 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OH 464C WLAFAYETTE OH
2002-04-23 740-720 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C NEWHOLLAND OH
2002-04-23 740-721 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C NEWLXINGTN OH
2002-04-23 740-761 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C BETHESDA OH
2002-04-23 740-786 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OH 464C SOMERTON OH
2002-04-23 740-794 0XXX1XXX3XXX6XXX8XXX · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K GALLIPOLIS OH
2002-04-23 740-806 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - OH 464C CHESHIRE OH
2002-04-23 740-807 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C NEWMTMORAS OH
2002-04-23 740-836 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SOMERSET OH
2002-04-23 740-841 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - OH 464C NEWPORT OH
2002-04-23 740-847 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → ONVOY, LLC - OH 464C THORNVILLE OH
2002-04-23 740-875 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - OH 464C VINTON OH
2002-04-23 740-891 0XXX1XXX2XXX3XXX7XXX8XXX · 3 holders which blocks → FIRST COMMUNICATIONS, LLC 460K ZANESVILLE OH
2002-04-23 740-910 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K LONDON OH
2002-04-23 740-923 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C NORWICH OH
2002-04-23 740-996 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FIRST COMMUNICATIONS, LLC 460K STEUBENVL OH
2002-04-23 740-997 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FIRST COMMUNICATIONS, LLC 460K BEALLSVL OH
2002-04-23 740-999 1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C CORNING OH
2002-04-16 740-324 1XXX2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MT VERNON OH
2002-04-10 740-443 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 PIKETON OH
2002-04-10 740-444 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 POMEROY OH
2002-03-21 740-314 0XXX1XXX2XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 STEUBENVL OH
2002-03-21 740-617 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ZANESVILLE OH
2002-03-14 740-447 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ATHENS OH
2002-03-06 740-233 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GAMBIER OH
2002-02-25 740-216 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LOGAN OH
2002-02-25 740-222 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 WAVERLY OH
2002-02-19 740-231 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 DUFFY OH
2002-02-19 740-239 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F WSNGTNCTHS OH
2002-02-19 740-956 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PAETEC ITEL, LLC 829J LONDON OH
2001-12-12 740-497 3XXX4XXX5XXX6XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CIRCLEVL OH
2001-11-14 740-237 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 IRONTON OH
2001-09-27 740-994 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LANCASTER OH
2001-09-21 740-438 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LANCASTER OH
2001-08-08 740-236 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 MARIETTA OH
2001-07-26 740-459 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 CALDWELL OH
2001-07-10 740-645 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GALLIPOLIS OH
2001-07-10 740-646 7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IRONTON OH
2001-07-03 740-409 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LANCASTER OH
2001-06-26 740-570 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 CHESTER OH
2001-06-26 740-571 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CIRCLEVL OH
2001-06-26 740-573 0–9 XXXall 10 · 8 holders which blocks → PAETEC ITEL, LLC 829J ARABIA 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.