NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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, all time — NPA 541
QWEST CORPORATION 184
ONVOY, LLC - OR 70
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 69
T-MOBILE USA, INC. 54
CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 53
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
2008-08-28 541-641 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E YONCALLA OR
2008-08-28 541-652 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E BLY OR
2008-08-28 541-845 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E MERRILL OR
2008-08-28 541-859 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OR 750E ROCKYPOINT OR
2008-08-28 541-871 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OR 750E SPRAGUERIV OR
2008-08-28 541-872 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E GLIDE OR
2008-08-28 541-906 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E PAISLEY OR
2008-08-28 541-909 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E NO UMPQUA OR
2008-06-26 541-357 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 EUGENE OR
2008-06-17 541-375 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9638 ROSEBURG OR
2008-06-10 541-603 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E EUGENE OR
2008-05-27 541-525 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F EUGENE OR
2008-04-15 541-808 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K COOS BAY OR
2008-02-26 541-636 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 EUGENE OR
2008-02-19 541-852 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 EUGENE OR
2008-02-14 541-614 0XXX1XXX4XXX6XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LINCOLN CY OR
2008-02-14 541-769 0–9 XXXall 10 · 2 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K THE DALLES OR
2008-01-11 541-407 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E LAKEVIEW OR
2008-01-11 541-658 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E CRESWELL OR
2008-01-09 541-635 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K TOLEDO OR
2007-11-05 541-706 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEND OR
2007-11-02 541-222 0–9 XXXall 10 · 2 holders which blocks → QWEST CORPORATION 9638 EUGENE OR
2007-08-27 541-647 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEND OR
2007-05-30 541-960 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E ELGIN OR
2007-05-16 541-719 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 SISTERS OR
2007-05-14 541-701 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HERMISTON OR
2007-05-14 541-879 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WHITE CITY OR
2007-04-30 541-728 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 BEND OR
2007-04-26 541-897 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K PHOENIX OR
2007-04-03 541-499 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MEDFORD OR
2007-03-13 541-803 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E CULVER OR
2007-03-13 541-854 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E BLUE RIVER OR
2007-02-21 541-516 0–9 XXXall 10 · 6 holders which blocks → QWEST CORPORATION 9638 REDMOND OR
2007-02-20 541-537 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ROSEBURG OR
2006-12-21 541-725 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 MAPLETON OR
2006-11-07 541-626 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 UMATILLA OR
2006-10-24 541-697 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → ONVOY, LLC - OR 750E HUNTINGTON OR
2006-09-25 541-299 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - OR 750E ROGUERIVER OR
2006-09-25 541-708 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E ASHLAND OR
2006-09-25 541-833 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E VENETA OR
2006-09-25 541-876 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E LAPINE OR
2006-08-23 541-637 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9638 ROSEBURG OR
2006-08-08 541-727 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 CENTRAL PT OR
2006-05-15 541-646 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 MEDFORD OR
2006-03-31 541-818 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J SWEET HOME OR
2006-03-13 541-844 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E EUGENE OR
2006-02-15 541-678 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEND OR
2006-02-13 541-616 not yet reported which blocks → EASTERN OREGON TELECOM, LLC - OR 3955 BOARDMAN OR
2006-02-03 541-633 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9638 BEND OR
2006-01-25 541-848 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BEND OR

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.