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
— 541-740 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CORVALLIS OR
— 541-741 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-742 not yet reported which blocks → PINE TEL. SYSTEM 2392 HALFWAY OR
— 541-743 1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 EUGENE OR
— 541-744 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-745 1XXX4XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-746 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-747 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-749 0XXX5XXX7XXX8XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 BEND OR
— 541-750 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-751 3XXX5XXX which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 COOS BAY OR
— 541-752 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-753 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-754 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-755 not yet reported which blocks → PINE TEL. SYSTEM 2392 SUMPTER OR
— 541-756 not yet reported which blocks → ZIPLY FIBER PACIFIC, LLC DBA ZIPLY FIBER 517K COOS BAY OR
— 541-757 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-758 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-759 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4323 LAKESIDE OR
— 541-760 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 CORVALLIS OR
— 541-761 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 GRANTSPASS OR
— 541-762 not yet reported which blocks → ONVOY, LLC - OR 750E EUGENE OR
— 541-763 5XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 FOSSIL OR
— 541-764 1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 DEPOE BAY OR
— 541-765 1XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2395 DEPOE BAY OR
— 541-766 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-767 4XXX6XXX7XXX8XXX · 4 holders which blocks → QWEST CORPORATION 9638 COTTAGEGRV OR
— 541-768 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-770 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-771 none assigned yet which blocks → UNITED STATES CELLULAR - OR 6349 BEND OR
— 541-772 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-773 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-774 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-776 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-777 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 MADRAS OR
— 541-778 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MEDFORD OR
— 541-779 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-782 7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9638 OAKRIDGE OR
— 541-783 8XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 CHILOQUIN OR
— 541-784 5XXX6XXX7XXX8XXX which blocks → QWEST CORPORATION 9638 ROSEBURG OR
— 541-785 not yet reported which blocks → PINE TEL. SYSTEM 2392 OXBOW OR
— 541-786 6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 LA GRANDE OR
— 541-787 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - OR 6349 GRANTSPASS OR
— 541-788 6XXX which blocks → T-MOBILE USA, INC. 6529 BEND OR
— 541-791 6XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9638 ALBANY OR
— 541-793 4XXX5XXX · 2 holders which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 DIAMOND LK OR
— 541-798 not yet reported which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MERRILL OR
— 541-806 7XXX which blocks → UNITED STATES CELLULAR - OR 6349 HOOD RIVER OR
— 541-810 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → UNITED STATES CELLULAR - OR 6349 KLAMATHFLS OR
— 541-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX 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.