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
— 541-247 1XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 GOLD BEACH OR
— 541-248 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 ALBANY OR
— 541-250 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 CORVALLIS OR
— 541-251 5XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - OR 6349 BROOKINGS OR
— 541-255 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 EUGENE OR
— 541-257 0XXX1XXX5XXX7XXX8XXX · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 CORVALLIS OR
— 541-258 9XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 LEBANON OR
— 541-259 9XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 LEBANON OR
— 541-260 5XXX6XXX7XXX8XXX9XXX which blocks → UNITED STATES CELLULAR - OR 6349 COOS BAY OR
— 541-261 6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MEDFORD OR
— 541-262 0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → QWEST CORPORATION 9638 OREGONSLOP OR
— 541-265 not yet reported which blocks → QWEST CORPORATION 9638 NEWPORT OR
— 541-266 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 COOS BAY OR
— 541-267 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 COOS BAY OR
— 541-268 5XXX which blocks → QWEST CORPORATION 9638 MAPLETON OR
— 541-269 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 COOS BAY OR
— 541-270 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWPORT OR
— 541-271 7XXX8XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 REEDSPORT OR
— 541-272 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 NEWPORT OR
— 541-273 not yet reported which blocks → QWEST CORPORATION 9638 KLAMATHFLS OR
— 541-276 not yet reported which blocks → QWEST CORPORATION 9638 PENDLETON OR
— 541-277 not yet reported which blocks → OREGON TEL. CORP. 2389 JUNTURA OR
— 541-278 not yet reported which blocks → QWEST CORPORATION 9638 PENDLETON OR
— 541-279 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 MADRAS OR
— 541-280 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 BEND OR
— 541-281 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 KLAMATHFLS OR
— 541-282 3XXX4XXX which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-284 not yet reported which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 EUGENE OR
— 541-285 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 EUGENE OR
— 541-286 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F CORVALLIS OR
— 541-290 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 COOS BAY OR
— 541-291 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 GRANTSPASS OR
— 541-296 not yet reported which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 THE DALLES OR
— 541-298 not yet reported which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 THE DALLES OR
— 541-300 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 THE DALLES OR
— 541-301 none assigned yet which blocks → T-MOBILE USA, INC. 6529 MEDFORD OR
— 541-302 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-308 4XXX which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 HOOD RIVER OR
— 541-310 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PENDLETON OR
— 541-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 541-312 not yet reported which blocks → QWEST CORPORATION 9638 BEND OR
— 541-313 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E OAKRIDGE OR
— 541-316 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 REDMOND OR
— 541-317 not yet reported which blocks → QWEST CORPORATION 9638 BEND OR
— 541-318 not yet reported which blocks → QWEST CORPORATION 9638 BEND OR
— 541-319 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OR 750E REEDSPORT OR
— 541-321 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 JUNCTIONCY OR
— 541-322 not yet reported which blocks → QWEST CORPORATION 9638 BEND OR
— 541-325 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9638 MADRAS OR
— 541-327 4XXX5XXX6XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 JEFFERSON 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.