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
— 541-914 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
— 541-951 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 MEDFORD OR
— 541-952 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → QWEST CORPORATION 9638 JUNCTIONCY OR
— 541-953 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUGENE OR
— 541-954 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUGENE OR
— 541-955 not yet reported which blocks → QWEST CORPORATION 9638 GRANTSPASS OR
— 541-956 3XXX4XXX · 2 holders which blocks → QWEST CORPORATION 9638 GRANTSPASS OR
— 541-957 not yet reported which blocks → QWEST CORPORATION 9638 ROSEBURG OR
— 541-958 not yet reported which blocks → OR
— 541-959 not yet reported which blocks → OR
— 541-961 5XXX6XXX7XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 NEWPORT OR
— 541-962 none assigned yet which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 LA GRANDE OR
— 541-963 not yet reported which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 LA GRANDE OR
— 541-964 not yet reported which blocks → PIONEER TEL. COOPERATIVE 2393 TRIANGLELK OR
— 541-965 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 THE DALLES OR
— 541-966 5XXX which blocks → QWEST CORPORATION 9638 PENDLETON OR
— 541-967 not yet reported which blocks → QWEST CORPORATION 9638 ALBANY OR
— 541-968 8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 EUGENE OR
— 541-969 5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PENDLETON OR
— 541-970 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → UNITED STATES CELLULAR - OR 6349 PENDLETON OR
— 541-971 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ALBANY OR
— 541-973 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → UNITED STATES CELLULAR - OR 6349 MEDFORD 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.