NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
— 541-465 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-466 7XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 BROWNSVL OR
— 541-467 not yet reported which blocks → NORTH-STATE TEL. CO. 2388 DUFUR OR
— 541-468 5XXX8XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 SPRAY OR
— 541-469 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 BROOKINGS OR
— 541-471 not yet reported which blocks → QWEST CORPORATION 9638 GRANTSPASS OR
— 541-472 not yet reported which blocks → QWEST CORPORATION 9638 GRANTSPASS OR
— 541-473 7XXX which blocks → QWEST CORPORATION 9638 VALE OR
— 541-474 not yet reported which blocks → QWEST CORPORATION 9638 GRANTSPASS OR
— 541-475 not yet reported which blocks → QWEST CORPORATION 9638 MADRAS OR
— 541-476 not yet reported which blocks → QWEST CORPORATION 9638 GRANTSPASS OR
— 541-477 2XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 PAULINA OR
— 541-478 not yet reported which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 MOSIER OR
— 541-479 not yet reported which blocks → QWEST CORPORATION 9638 GRANTSPASS OR
— 541-480 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEND OR
— 541-481 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 BOARDMAN OR
— 541-482 not yet reported which blocks → QWEST CORPORATION 9638 ASHLAND OR
— 541-483 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 TYGHVALLEY OR
— 541-484 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-485 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-486 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 LOBSTERVLY OR
— 541-487 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 ALSEA OR
— 541-488 not yet reported which blocks → QWEST CORPORATION 9638 ASHLAND OR
— 541-489 not yet reported which blocks → TRANS-CASCADES TEL. CO. 2378 ANTELOPE OR
— 541-490 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HOOD RIVER OR
— 541-491 6XXX7XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 SHEDD OR
— 541-492 not yet reported which blocks → ONVOY, LLC - OR 750E ROSEBURG OR
— 541-493 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 NO HARNEY OR
— 541-494 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F MEDFORD OR
— 541-495 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 SO HARNEY OR
— 541-496 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 GLIDE OR
— 541-497 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 ALBANY OR
— 541-498 1XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 NO UMPQUA OR
— 541-501 none assigned yet which blocks → METROPCS, INC. 5562 EUGENE OR
— 541-504 6XXX which blocks → QWEST CORPORATION 9638 REDMOND OR
— 541-506 not yet reported which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 THE DALLES OR
— 541-510 2XXX3XXX4XXX5XXX6XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 EUGENE OR
— 541-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 541-512 4XXX5XXX6XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9638 PHOENIX OR
— 541-513 not yet reported which blocks → T-MOBILE USA, INC. 6529 EUGENE OR
— 541-514 5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 EUGENE OR
— 541-515 4XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 EUGENE OR
— 541-517 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 EUGENE OR
— 541-519 1XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BAKER OR
— 541-520 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 EUGENE OR
— 541-521 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 EUGENE OR
— 541-522 not yet reported which blocks → HUMBOLDT TELEPHONE COMPANY 3304 QUINN OR
— 541-523 not yet reported which blocks → QWEST CORPORATION 9638 BAKER OR
— 541-524 3XXX4XXX5XXX6XXX · 4 holders which blocks → QWEST CORPORATION 9638 BAKER OR
— 541-528 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 TIDEWATER OR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.