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
— 541-846 2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 PROVOTMPHY OR
— 541-847 not yet reported which blocks → MONROE TEL. CO. 2385 MONROE OR
— 541-849 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 YONCALLA OR
— 541-850 not yet reported which blocks → QWEST CORPORATION 9638 KLAMATHFLS OR
— 541-851 1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 6 holders which blocks → QWEST CORPORATION 9638 KLAMATHFLS OR
— 541-853 not yet reported which blocks → CASCADE UTILITIES, INC. 2371 MEDICALSPG OR
— 541-855 3XXX4XXX6XXX · 3 holders which blocks → QWEST CORPORATION 9638 GOLD HILL OR
— 541-856 not yet reported which blocks → CASCADE UTILITIES, INC. 2371 HAINES OR
— 541-857 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-858 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-860 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → ZIPLY FIBER OREGON, LLC DBA ZIPLY FIBER 3401 MYRTLE CRK OR
— 541-861 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → METROPCS, INC. 5562 MILTONFWTR OR
— 541-862 0XXX1XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 PROVOTMPHY OR
— 541-863 none assigned yet which blocks → ZIPLY FIBER OREGON, LLC DBA ZIPLY FIBER 3401 MYRTLE CRK OR
— 541-864 0XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-865 1XXX6XXX8XXX · 2 holders which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 BUTTEFALLS OR
— 541-866 1XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → ZIPLY FIBER OREGON, LLC DBA ZIPLY FIBER 3401 WOLF CREEK OR
— 541-867 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 SOUTHBEACH OR
— 541-868 4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 EUGENE OR
— 541-869 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 HUNTINGTON OR
— 541-870 none assigned yet which blocks → T-MOBILE USA, INC. 6529 EUGENE OR
— 541-874 1XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → ZIPLY FIBER OREGON, LLC DBA ZIPLY FIBER 3401 RIDDLE OR
— 541-875 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 CHITWOOD OR
— 541-877 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 DURKEE OR
— 541-878 6XXX which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 SHADY COVE OR
— 541-880 3XXX4XXX6XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 KLAMATHFLS OR
— 541-881 not yet reported which blocks → QWEST CORPORATION 9638 ONTARIO OR
— 541-882 not yet reported which blocks → QWEST CORPORATION 9638 KLAMATHFLS OR
— 541-883 not yet reported which blocks → QWEST CORPORATION 9638 KLAMATHFLS OR
— 541-884 not yet reported which blocks → QWEST CORPORATION 9638 KLAMATHFLS OR
— 541-885 not yet reported which blocks → QWEST CORPORATION 9638 KLAMATHFLS OR
— 541-886 0XXX1XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 WALLOWA OR
— 541-888 not yet reported which blocks → ZIPLY FIBER PACIFIC, LLC DBA ZIPLY FIBER 517K COOS BAY OR
— 541-889 not yet reported which blocks → QWEST CORPORATION 9638 ONTARIO OR
— 541-890 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 MEDFORD OR
— 541-891 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 KLAMATHFLS OR
— 541-892 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 KLAMATHFLS OR
— 541-893 not yet reported which blocks → EAGLE TEL. SYSTEM, INC. 2369 RICHLAND OR
— 541-894 7XXX which blocks → QWEST CORPORATION 9638 SUMPTER OR
— 541-895 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 CRESWELL OR
— 541-896 1XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9638 LEABURG OR
— 541-898 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 NO POWDER OR
— 541-899 not yet reported which blocks → QWEST CORPORATION 9638 JACKSONVL OR
— 541-902 3XXX4XXX5XXX6XXX · 4 holders which blocks → QWEST CORPORATION 9638 FLORENCE OR
— 541-905 3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALBANY OR
— 541-908 7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 CORVALLIS OR
— 541-910 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 LA GRANDE OR
— 541-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 541-912 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUGENE OR
— 541-913 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUGENE 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.