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
— 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
— 541-914 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUGENE OR
— 541-915 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUGENE OR
— 541-917 not yet reported which blocks → QWEST CORPORATION 9638 ALBANY OR
— 541-918 1XXX2XXX3XXX · 2 holders which blocks → QWEST CORPORATION 9638 ALBANY OR
— 541-921 6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 LINCOLN CY OR
— 541-922 7XXX8XXX which blocks → QWEST CORPORATION 9638 UMATILLA OR
— 541-923 not yet reported which blocks → QWEST CORPORATION 9638 REDMOND OR
— 541-924 not yet reported which blocks → QWEST CORPORATION 9638 ALBANY OR
— 541-925 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 HORTON OR
— 541-926 not yet reported which blocks → QWEST CORPORATION 9638 ALBANY OR
— 541-927 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 TRIANGLELK OR
— 541-928 not yet reported which blocks → QWEST CORPORATION 9638 ALBANY OR
— 541-929 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 PHILOMATH OR
— 541-932 not yet reported which blocks → OREGON TEL. CORP. 2389 MT VERNON OR
— 541-933 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 MARCOLA OR
— 541-934 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MONUMENT OR
— 541-935 not yet reported which blocks → QWEST CORPORATION 9638 VENETA OR
— 541-936 3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ALBANY OR
— 541-937 5XXX6XXX7XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9638 LOWELL OR
— 541-938 not yet reported which blocks → QWEST CORPORATION 9638 MILTONFWTR OR
— 541-941 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MEDFORD OR
— 541-942 not yet reported which blocks → QWEST CORPORATION 9638 COTTAGEGRV OR
— 541-943 2XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 PAISLEY OR
— 541-944 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MEDFORD OR
— 541-946 0XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 COTTAGEGRV OR
— 541-947 1XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 LAKEVIEW OR
— 541-948 5XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 BEND OR
— 541-949 1XXX2XXX7XXX · 3 holders which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 FISH LAKE OR
— 541-950 not yet reported which blocks → 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.