NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

2 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 234
8X8, INC. 2
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2017-10-23 234-237 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2017-10-13 234-236 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 NO CANTON OH
2017-08-07 234-235 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORTLAND OH
2017-06-20 234-867 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H AKRON OH
2017-05-01 234-224 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C WELLSVILLE OH
2017-04-13 234-233 0–9 XXXall 10 · 8 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KENT OH
2017-04-07 234-230 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C YOUNGSTOWN OH
2017-03-24 234-375 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H MANCHESTR OH
2017-03-10 234-215 0–9 XXXall 10 · 6 holders which blocks → XO OHIO, INC. 7520 CANTON OH
2017-03-10 234-241 0–9 XXXall 10 · 5 holders which blocks → XO OHIO, INC. 7520 YOUNGSTOWN OH
2017-03-10 234-999 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H CANTON OH
2017-02-24 234-492 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K GREENSBURG OH
2017-01-20 234-226 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H AKRON OH
2016-10-19 234-423 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WILMOT OH
2016-09-26 234-219 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 DALTON OH
2016-07-18 234-263 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OHIO BELL TEL CO 9321 KENT OH
2016-06-24 234-417 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
2016-06-22 234-757 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F ALLIANCE OH
2016-04-22 234-830 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARREN OH
2016-04-13 234-430 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F WARREN OH
2016-03-29 234-413 0XXX1XXX2XXX3XXX4XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C BIGPRAIRIE OH
2016-03-29 234-415 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C KIDRON OH
2016-03-29 234-501 0XXX1XXX2XXX3XXX4XXX5XXX6XXX which blocks → ONVOY, LLC - OH 464C MARSHALLVL OH
2016-03-24 234-900 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AKRON OH
2015-12-16 234-425 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CANTON OH
2015-12-08 234-458 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON OH
2015-10-08 234-602 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 HUDSON OH
2015-08-21 234-444 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C GREENSBURG OH
2015-08-17 234-232 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 YOUNGSTOWN OH
2015-07-31 234-781 7XXX8XXX9XXX · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J AURORA OH
2015-06-25 234-777 0–9 XXXall 10 · 7 holders which blocks → ONVOY SPECTRUM, LLC 624H MAGNOLWSBG OH
2015-06-02 234-901 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F AKRON OH
2015-06-02 234-985 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F MANCHESTR OH
2015-05-22 234-973 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 RAVENNA OH
2015-05-14 234-410 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2015-05-06 234-714 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F NO CANTON OH
2015-04-09 234-408 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AURORA OH
2015-03-17 234-931 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 CANALFULTN OH
2015-01-15 234-409 0XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SPENCER OH
2015-01-15 234-603 0XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CRESTON OH
2014-12-10 234-360 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON OH
2014-11-17 234-347 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NO CANTON OH
2014-11-07 234-956 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F RITTMAN OH
2014-10-27 234-719 0–9 XXXall 10 · 5 holders which blocks → XO OHIO, INC. 7520 YOUNGSTOWN OH
2014-10-23 234-718 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 AKRON OH
2014-10-13 234-334 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2014-10-10 234-405 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANTUA OH
2014-09-11 234-716 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 AKRON OH
2014-08-29 234-720 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 ATWATER OH
2014-06-19 234-712 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.