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
2023-09-21 458-312 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E REDMOND OR
2023-09-21 458-313 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E WHITE CITY OR
2023-09-12 458-308 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PENDLETON OR
2023-08-17 458-307 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E CORVALLIS OR
2023-06-26 458-306 0XXX1XXX2XXX3XXX8XXX · 5 holders which blocks → ONVOY, LLC - OR 750E PORTORFORD OR
2023-06-15 458-305 0XXX5XXX7XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J STATELINE OR
2023-05-18 458-304 0XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HALSEY OR
2023-04-18 458-302 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MEDFORD OR
2023-04-04 458-288 0XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F GLIDE OR
2023-03-30 458-303 1XXX3XXX · 2 holders which blocks → ONVOY, LLC - OR 750E RUFUS OR
2023-03-17 458-299 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J MEDFORD OR
2023-03-09 458-298 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J EUGENE OR
2023-02-02 458-297 8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HALFWAY OR
2023-02-01 458-296 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J EUGENE OR
2023-01-30 458-294 0XXX5XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 MARCOLA OR
2023-01-30 458-295 5XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 JEFFERSON OR
2023-01-27 458-293 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 STANFIELD OR
2022-12-01 458-451 4XXX5XXX8XXX · 2 holders which blocks → ONVOY, LLC - OR 750E BUTTEFALLS OR
2022-11-23 458-291 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 GRANTSPASS OR
2022-10-03 458-290 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 KLAMATHFLS OR
2022-08-26 458-289 0XXX1XXX8XXX9XXX · 3 holders which blocks → FARMERS MUTUAL TELEPHONE COMPANY - OR 782H ONTARIO OR
2022-07-12 458-269 0XXX1XXX7XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F DRAIN OR
2022-05-16 458-301 0XXX1XXX · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K SELMA OR
2022-03-14 458-287 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PRINEVILLE OR
2022-03-08 458-285 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALBANY OR
2022-03-02 458-625 5XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BONANZA OR
2022-03-02 458-886 5XXX6XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BLY OR
2022-02-25 458-466 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BANDON OR
2022-02-23 458-582 0XXX1XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AZALEA OR
2022-02-23 458-763 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ASHLAND OR
2022-02-23 458-783 1XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DEPOE BAY OR
2022-02-22 458-286 1XXX which blocks → CHARTER IP ENABLED SERVICES, LLC 792K O BRIEN OR
2022-02-18 458-832 0XXX2XXX4XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PARKDALE OR
2022-02-18 458-846 1XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SO HARNEY OR
2022-02-15 458-624 5XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NO POWDER OR
2022-02-15 458-687 1XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORO OR
2022-02-15 458-726 5XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MONUMENT OR
2022-02-15 458-742 1XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NO HARNEY OR
2022-02-14 458-837 1XXX4XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MITCHELL OR
2022-02-09 458-463 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J JOSEPH OR
2022-02-09 458-632 7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J IONE OR
2022-02-07 458-746 0XXX1XXX2XXX3XXX4XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRASS VLY OR
2022-02-07 458-787 0XXX1XXX7XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HEPPNER OR
2022-02-04 458-987 1XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GILCHRIST OR
2022-02-01 458-646 0XXX2XXX4XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CASCADELKS OR
2022-02-01 458-723 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BURNS OR
2022-01-26 458-433 0XXX6XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J VALE OR
2022-01-20 458-284 0XXX1XXX5XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F HARRISBURG OR
2022-01-19 458-902 8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H COVE OR
2021-12-29 458-263 0XXX1XXX2XXX3XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F SILVERLAKE 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.