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
— 541-685 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-686 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-687 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-688 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-689 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-690 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 MEDFORD OR
— 541-691 not yet reported which blocks → ONVOY, LLC - OR 750E CANYONVL OR
— 541-693 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 BEND OR
— 541-700 not yet reported which blocks → OR
— 541-702 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 JACKSONVL OR
— 541-704 0XXX5XXX7XXX8XXX · 3 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 ALBANY OR
— 541-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OR
— 541-713 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-714 0XXX1XXX2XXX3XXX5XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-715 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-720 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 HERMISTON OR
— 541-723 1XXX which blocks → CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 2360 MALIN OR
— 541-724 not yet reported which blocks → OREGON-IDAHO UTILITIES, INC. 2390 ADRIAN OR
— 541-726 not yet reported which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-729 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 EUGENE OR
— 541-730 3XXX4XXX8XXX · 3 holders which blocks → METROPCS, INC. 5562 ALBANY OR
— 541-731 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 EUGENE OR
— 541-732 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-733 2XXX3XXX4XXX · 2 holders which blocks → UNITED STATES CELLULAR - OR 6349 ROSEBURG OR
— 541-734 not yet reported which blocks → QWEST CORPORATION 9638 MEDFORD OR
— 541-736 6XXX which blocks → QWEST CORPORATION 9638 EUGENE OR
— 541-737 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-738 not yet reported which blocks → QWEST CORPORATION 9638 CORVALLIS OR
— 541-739 7XXX which blocks → UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 4520 RUFUS OR
— 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

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.