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
2002-08-16 567-369 0XXX1XXX6XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HAYESVILLE OH
2002-08-16 567-404 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FAYETTE OH
2002-08-16 567-414 0XXX1XXX2XXX5XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GIBSONBURG OH
2002-08-13 567-232 3XXX6XXX7XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UPSANDUSKY OH
2002-07-30 567-221 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ADA OH
2002-07-30 567-226 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BLUFFTON OH
2002-07-30 567-231 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CHESTERVL OH
2002-07-30 567-233 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MARENGO OH
2002-07-16 567-201 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FREMONT OH
2002-07-16 567-203 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ASHLAND OH
2002-07-16 567-220 0XXX1XXX2XXX6XXX7XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TIFFIN OH
2002-06-28 567-224 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 WILLARD OH
2002-06-27 567-202 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TOLEDO OH
2002-06-25 567-334 1XXX2XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CONGRESS OH
2002-06-25 567-335 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 HAYESVILLE OH
2002-06-21 567-212 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 WEST SALEM OH
2002-06-21 567-214 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7158 BELLEVUE OH
2002-06-21 567-217 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 ASHLAND OH
2002-06-21 567-223 1XXX2XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 LOUDONVL OH
2002-06-21 567-351 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NEW LONDON OH
2002-06-21 567-510 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CELINA OH
2002-06-21 567-523 3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NORTH STAR OH
2002-06-21 567-621 1XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FTRECOVERY OH
2002-06-12 567-219 1XXX2XXX3XXX4XXX5XXX6XXX7XXX which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SANDUSKY OH
2002-06-12 567-340 0XXX1XXX3XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 GERALD OH
2002-06-12 567-341 0XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 NAPOLEON OH
2002-06-11 567-940 not yet reported which blocks → TSC COMMUNICATIONS, INC. - OH 0640 LIMA OH
2002-06-06 567-210 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 BRYAN OH
2002-05-16 567-208 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FINDLAY OH
2002-05-16 567-998 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 SANDUSKY OH
— 567-207 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TIFFIN OH
— 567-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OH
— 567-213 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BOWLNGGREN OH
— 567-215 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 ASHLAND OH
— 567-244 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F NORWALK OH
— 567-247 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K MANSFIELD OH
— 567-248 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F ATTICA OH
— 567-251 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F FINDLAY OH
— 567-252 2XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F MARBLEHEAD OH
— 567-253 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F KELLEYS IS OH
— 567-254 3XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F PUT IN BAY OH
— 567-255 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F FREMONT OH
— 567-256 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F SANDUSKY OH
— 567-257 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F UPSANDUSKY OH
— 567-258 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F TIFFIN OH
— 567-261 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F ASHLAND OH
— 567-262 6XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F OAK HARBOR OH
— 567-263 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F WILLARD OH
— 567-265 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F HURON OH
— 567-266 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F BELLEVUE 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.