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
2012-01-19 541-502 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F GOLD HILL OR
2011-12-12 541-214 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E EUGENE OR
2011-10-03 541-200 0–9 XXXall 10 · 7 holders which blocks → HUNTER CONSTRUCTION, INC. DBA HUNTER COMMS - OR 660C MEDFORD OR
2011-07-29 541-615 0–9 XXXall 10 · 4 holders which blocks → WARM SPRINGS TELECOMMUNICATIONS COMPANY - OR 094G MADRAS OR
2011-06-22 541-293 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 NYSSA OR
2011-03-11 541-275 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F UMATILLA OR
2010-05-11 541-638 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F BLACKBUTTE OR
2010-03-25 541-632 0–9 XXXall 10 · 6 holders which blocks → ELTOPIA COMMUNICATIONS LLC - OR 647F EUGENE OR
2010-03-10 541-629 not yet reported which blocks → PINE TEL. SYSTEM 2392 THREE RVS OR
2009-11-06 541-656 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HERMISTON OR
2009-10-23 541-645 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 HOOD RIVER OR
2009-09-14 541-613 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 MEDFORD OR
2009-05-11 541-649 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 8 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 COTTAGEGRV OR
2009-03-16 541-639 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEND OR
2009-03-13 541-307 not yet reported which blocks → COMCAST IP PHONE, LLC 318J PHILOMATH OR
2009-03-05 541-414 0–9 XXXall 10 · 4 holders which blocks → HUNTER CONSTRUCTION, INC. DBA HUNTER COMMS - OR 660C MEDFORD OR
2009-02-17 541-590 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 FLORENCE OR
2008-11-19 541-605 0–9 XXXall 10 · 7 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LA GRANDE OR
2008-10-08 541-508 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E BEND OR
2008-09-17 541-790 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E EUGENE OR
2008-09-05 541-355 0–9 XXXwhole prefix which blocks → BENDTEL, INC. - OR 9627 BEND OR
2008-09-04 541-470 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E DURKEE OR
2008-09-04 541-532 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E PILOT ROCK OR
2008-09-04 541-628 1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - OR 750E JOHN DAY OR
2008-09-04 541-651 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E FOSSIL OR
2008-09-04 541-794 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OR 750E NO POWDER OR
2008-09-04 541-795 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OR 750E HEPPNER OR
2008-09-04 541-796 5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - OR 750E HUNTINGTON OR
2008-09-04 541-931 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OR 750E GILCHRIST OR
2008-09-04 541-939 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E LONG CREEK OR
2008-09-04 541-940 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E LEXINGTON OR
2008-09-04 541-945 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E BOARDMAN OR
2008-09-04 541-985 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E TYGHVALLEY OR
2008-09-03 541-627 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OR 750E MITCHELL OR
2008-09-03 541-634 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E SPRAY OR
2008-09-03 541-692 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OR 750E MALIN OR
2008-09-03 541-694 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E CHEMULT OR
2008-09-03 541-695 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E WAMIC OR
2008-09-03 541-696 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OR 750E CAMAS VLY OR
2008-09-03 541-703 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E UKIAH OR
2008-09-03 541-712 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OR 750E BONANZA OR
2008-09-03 541-721 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - OR 750E MONUMENT OR
2008-09-03 541-722 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OR 750E SO HARNEY OR
2008-09-03 541-748 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E PAULINA OR
2008-09-03 541-781 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - OR 750E NO HARNEY OR
2008-09-03 541-834 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E PINE GROVE OR
2008-09-03 541-873 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E SENECA OR
2008-09-02 541-804 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OR 750E DRAIN OR
2008-09-02 541-827 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - OR 750E CHILOQUIN OR
2008-09-02 541-835 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OR 750E FT KLAMATH 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.