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 380
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2023-01-09 380-257 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUBLIN OH
2022-12-06 380-383 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C COLUMBUS OH
2022-11-02 380-324 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C GAHANNA OH
2022-10-28 380-256 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → NUSO, LLC 732J ALTON OH
2022-10-14 380-255 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H NEW ALBANY OH
2022-09-07 380-254 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H WESTERVL OH
2022-08-19 380-253 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CANALWHSTR OH
2022-08-04 380-252 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F WESTERVL OH
2022-08-02 380-250 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 DUBLIN OH
2022-08-02 380-251 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 COLUMBUS OH
2022-05-04 380-246 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C WESTERVL OH
2022-05-04 380-248 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C REYNOLDSBG OH
2022-05-04 380-249 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H COLUMBUS OH
2022-03-29 380-245 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J COLUMBUS OH
2022-01-25 380-244 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F WJEFFERSON OH
2022-01-07 380-837 0XXX1XXX4XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GROVEPORT OH
2021-12-29 380-242 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C COLUMBUS OH
2021-12-21 380-241 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J COLUMBUS OH
2021-11-04 380-240 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OH 7532 DUBLIN OH
2021-09-08 380-238 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 DUBLIN OH
2021-09-03 380-236 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C PLAIN CITY OH
2021-08-10 380-231 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2021-07-28 380-229 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OH 464C NEW ALBANY OH
2021-07-28 380-230 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F ALTON OH
2021-06-28 380-232 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C DUBLIN OH
2021-06-14 380-227 0–9 XXXall 10 · 7 holders which blocks → VISION CTS, LLC 125J WORTHINGTN OH
2021-06-14 380-228 0–9 XXXall 10 · 6 holders which blocks → VISION CTS, LLC 125J CANALWHSTR OH
2021-05-19 380-226 0–9 XXXall 10 · 6 holders which blocks → VONAGE AMERICA LLC 197D WESTERVL OH
2021-04-19 380-356 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H HARRISBURG OH
2021-04-19 380-529 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H GAHANNA OH
2021-03-31 380-225 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F LOCKBOURNE OH
2021-03-30 380-895 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J COLUMBUS OH
2021-02-03 380-388 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C ALTON OH
2021-02-03 380-500 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C WORTHINGTN OH
2021-02-03 380-979 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C GROVE CITY OH
2021-01-19 380-465 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H REYNOLDSBG OH
2021-01-06 380-280 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C GROVEPORT OH
2021-01-04 380-234 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H COLUMBUS OH
2020-11-09 380-224 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F REYNOLDSBG OH
2020-11-04 380-223 0–9 XXXall 10 · 6 holders which blocks → AIRESPRING, INC. 996H COLUMBUS OH
2020-10-23 380-220 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C WESTERVL OH
2020-10-23 380-221 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C WJEFFERSON OH
2020-10-06 380-219 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J COLUMBUS OH
2020-09-11 380-218 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2020-09-08 380-345 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HILLIARD OH
2020-08-13 380-217 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 PLAIN CITY OH
2020-08-06 380-400 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H GAHANNA OH
2020-05-28 380-214 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C DUBLIN OH
2020-02-12 380-300 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HARRISBURG OH
2020-02-12 380-600 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H LOCKBOURNE 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.