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
— 541-393 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 EUGENE OR
— 541-395 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MAUPIN OR
— 541-396 0XXX8XXX9XXX · 3 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 COQUILLE OR
— 541-400 1XXX2XXX4XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 HOOD RIVER OR
— 541-401 6XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 LEBANON OR
— 541-405 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 LEBANON OR
— 541-408 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEND OR
— 541-409 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LEBANON OR
— 541-410 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEND OR
— 541-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 541-412 5XXX6XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 BROOKINGS OR
— 541-416 not yet reported which blocks → QWEST CORPORATION 9638 PRINEVILLE OR
— 541-419 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEND OR
— 541-420 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 BEND OR
— 541-421 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 LONG CREEK OR
— 541-422 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 IONE OR
— 541-424 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 BELLFONTAN OR
— 541-426 1XXX7XXX · 2 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 ENTERPRISE OR
— 541-427 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 UKIAH OR
— 541-428 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 PILOT ROCK OR
— 541-430 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 ROSEBURG OR
— 541-431 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-432 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 JOSEPH OR
— 541-433 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 GILCHRIST OR
— 541-434 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-436 0–9 XXXall 10 · 6 holders which blocks → AXXIS COMMUNICATION, INC. - OR 9231 HOOD RIVER OR
— 541-438 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 HARLAN OR
— 541-439 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 POWERS OR
— 541-440 not yet reported which blocks → QWEST CORPORATION 9638 ROSEBURG OR
— 541-441 3XXX4XXX5XXX6XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 GRANTSPASS OR
— 541-442 1XXX2XXX4XXX7XXX · 3 holders which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 WASCO OR
— 541-443 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 PILOT ROCK OR
— 541-444 0XXX3XXX5XXX6XXX · 2 holders which blocks → QWEST CORPORATION 9638 SILETZ OR
— 541-445 8XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 CAMAS VLY OR
— 541-446 not yet reported which blocks → OREGON TEL. CORP. 2389 HEREFDUNTY OR
— 541-447 not yet reported which blocks → QWEST CORPORATION 9638 PRINEVILLE OR
— 541-448 not yet reported which blocks → OREGON TEL. CORP. 2389 BATES OR
— 541-449 0XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → QWEST CORPORATION 9638 STANFIELD OR
— 541-450 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 GRANTSPASS OR
— 541-451 0XXX9XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 LEBANON OR
— 541-452 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 CORVALLIS OR
— 541-453 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 BLODGETT OR
— 541-454 1XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 ARLINGTON OR
— 541-456 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 SUMMIT OR
— 541-457 not yet reported which blocks → HELIX TEL. CO. 2376 HELIX OR
— 541-459 not yet reported which blocks → QWEST CORPORATION 9638 OAKLAND OR
— 541-461 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-462 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MITCHELL OR
— 541-463 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-464 not yet reported which blocks → QWEST CORPORATION 9638 ROSEBURG 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.