NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 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, last 30 days — NPA 567
8X8, INC. 1
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
2014-09-30 567-601 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 ARLINGTON OH
2014-09-12 567-707 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F JENERA OH
2014-08-12 567-402 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MAUMEE OH
2014-03-27 567-407 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PLYMOUTH OH
2014-03-27 567-423 0–9 XXXall 10 · 8 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J PERRYSVL OH
2014-03-25 567-352 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HASKISTGNY OH
2014-03-25 567-612 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GREEN SPG OH
2014-03-25 567-706 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MONROEVL OH
2014-03-12 567-319 0XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WAPAKONETA OH
2014-03-12 567-702 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TOLEDO OH
2013-11-27 567-603 0XXX1XXX3XXX7XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7158 MINSTER OH
2013-11-14 567-701 7XXX which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NAPOLEON OH
2013-10-29 567-324 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ROCKFORD OH
2013-09-24 567-320 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LAFAYETTE OH
2013-09-24 567-802 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GOMER OH
2013-09-20 567-323 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ADARIO OH
2013-09-05 567-801 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TOLEDO OH
2013-08-21 567-803 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F TOLEDO OH
2013-07-25 567-318 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J TOLEDO OH
2013-07-08 567-368 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C PERRYSBURG OH
2013-07-02 567-236 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ELMORE OH
2013-07-02 567-268 0–9 XXXall 10 · 8 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K TIFFIN OH
2013-06-03 567-805 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NORWALK OH
2013-05-22 567-413 0XXX1XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BOWLNGGREN OH
2013-05-16 567-309 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MANSFIELD OH
2013-04-23 567-348 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C BOWLNGGREN OH
2013-04-16 567-289 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LIMA OH
2013-04-16 567-312 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K TOLEDO OH
2013-04-16 567-560 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MANSFIELD OH
2013-03-27 567-418 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LIMA OH
2012-12-31 567-200 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C TOLEDO OH
2012-11-27 567-315 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G TOLEDO OH
2012-11-02 567-316 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TOLEDO OH
2012-03-05 567-310 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E SULLIVAN OH
2012-03-02 567-308 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E NOVA OH
2012-02-17 567-218 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TOLEDO OH
2011-12-28 567-307 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MANSFIELD OH
2011-11-29 567-302 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F MAUMEE OH
2011-10-12 567-301 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 FINDLAY OH
2011-09-15 567-287 0–9 XXXall 10 · 8 holders which blocks → WINDSTREAM OHIO, LLC 0665 DELTA OH
2011-09-15 567-305 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM OHIO, LLC 0665 KENTON OH
2011-09-02 567-209 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F LEXINGTON OH
2011-06-23 567-222 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E SHILOH OH
2011-06-23 567-285 not yet reported which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - OH 024E ADARIO OH
2011-05-02 567-400 0–9 XXXall 10 · 6 holders which blocks → AMERICAN BROADBAND AND TELECOMMS COMPANY - OH 509B GENOA OH
2011-03-01 567-296 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C UPSANDUSKY OH
2011-02-16 567-300 0XXX1XXX3XXX8XXX · 3 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - OH 047G HICKSVILLE OH
2011-01-31 567-538 not yet reported which blocks → GLANDORF TELEPHONE COMPANY, INC. - OH 359G OTTAWA OH
2010-09-01 567-280 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F FREMONT OH
2010-08-17 567-328 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LIMA 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.