NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 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 458
ONVOY, LLC - OR 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
2021-12-15 458-283 0XXX1XXX · 2 holders which blocks → QWEST CORPORATION 9638 JACKSONVL OR
2021-12-14 458-281 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F BEND OR
2021-12-14 458-282 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F COTTAGEGRV OR
2021-11-23 458-280 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 OAKLAND OR
2021-11-19 458-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H EUGENE OR
2021-11-16 458-901 0XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H COOS BAY OR
2021-11-15 458-279 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F FLORENCE OR
2021-11-09 458-277 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 NEWPORT OR
2021-11-09 458-278 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ALBANY OR
2021-11-02 458-275 0XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CRESWELL OR
2021-09-13 458-276 0–9 XXXall 10 · 6 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ONTARIO OR
2021-09-13 458-455 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J COOS BAY OR
2021-09-13 458-544 0–9 XXXall 10 · 6 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J EUGENE OR
2021-09-13 458-588 0–9 XXXall 10 · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J THE DALLES OR
2021-09-13 458-877 0–9 XXXall 10 · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J LA GRANDE OR
2021-08-27 458-274 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CENTRAL PT OR
2021-08-24 458-273 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF OREGON, LLC - OR 157F EUGENE OR
2021-08-20 458-272 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF OREGON, LLC - OR 157F CORVALLIS OR
2021-07-16 458-345 0XXX1XXX2XXX4XXX6XXX8XXX · 6 holders which blocks → FRACTEL, LLC 965H ENTERPRISE OR
2021-06-30 458-270 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F VENETA OR
2021-06-30 458-271 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 ROSEBURG OR
2021-06-23 458-267 0XXX3XXX4XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 POWERS OR
2021-06-23 458-268 0XXX3XXX7XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 COQUILLE OR
2021-06-23 458-457 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H NYSSA OR
2021-06-03 458-488 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MEDFORD OR
2021-05-27 458-266 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LEBANON OR
2021-04-29 458-265 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 WHITE CITY OR
2021-04-22 458-264 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H JUNCTIONCY OR
2021-04-16 458-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E EUGENE OR
2021-03-18 458-262 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALBANY OR
2021-03-03 458-261 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J EUGENE OR
2021-03-02 458-260 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BROOKINGS OR
2021-02-09 458-836 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BEND OR
2021-02-05 458-446 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E ONTARIO OR
2021-02-01 458-259 0XXX6XXX · 2 holders which blocks → ALYRICA TELEPHONE LLC DBA NEXT GEN PHONE SYS-OR 9882 BROWNSVL OR
2020-11-25 458-257 0–9 XXXall 10 · 7 holders which blocks → UNITED STATES CELLULAR - OR 6349 GRANTSPASS OR
2020-10-23 458-895 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J EUGENE OR
2020-09-28 458-254 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 KLAMATHFLS OR
2020-09-28 458-255 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - OR 6349 HERMISTON OR
2020-09-16 458-253 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ALBANY OR
2020-09-10 458-252 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J OREGONSLOP OR
2020-08-11 458-592 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CAVE JCT OR
2020-07-28 458-356 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H EUGENE OR
2020-07-28 458-529 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H PHOENIX OR
2020-07-28 458-946 0XXX1XXX3XXX4XXX · 4 holders which blocks → FRACTEL, LLC 965H RIDDLE OR
2020-07-14 458-666 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BEND OR
2020-07-10 458-250 0–9 XXXall 10 · 5 holders which blocks → CSC WIRELESS, LLC 425J EUGENE OR
2020-05-13 458-249 0XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHILOQUIN OR
2020-04-06 458-258 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OR 750E ROGUERIVER OR
2020-01-27 458-251 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E ONTARIO OR

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.