NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 402
QWEST CORPORATION 160
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
— 402-575 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-577 0XXX1XXX · 2 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-591 0XXX1XXX9XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-592 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-593 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-594 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-595 0XXX8XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-596 5XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-597 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-599 0XXX3XXX9XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-633 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-636 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-637 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-661 0XXX4XXX9XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-667 not yet reported which blocks → QWEST CORPORATION 9631 SO YANKTON NE
— 402-682 1XXX2XXX3XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-685 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 OAKLAND NE
— 402-687 0XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 TEKAMAH NE
— 402-691 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-695 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 EMERSON NE
— 402-697 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-698 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9631 HOMER NE
— 402-721 not yet reported which blocks → QWEST CORPORATION 9631 FREMONT NE
— 402-727 not yet reported which blocks → QWEST CORPORATION 9631 FREMONT NE
— 402-731 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-733 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-734 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-738 0XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-753 5XXX7XXX which blocks → QWEST CORPORATION 9631 FREMONT NE
— 402-758 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-778 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-779 1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-833 1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 WAYNE NE
— 402-861 3XXX5XXX · 2 holders which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-888 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-891 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-892 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9631 CLARKSON NE
— 402-894 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-895 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-896 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-923 3XXX4XXX5XXX6XXX7XXX8XXX which blocks → QWEST CORPORATION 9631 HUMPHREY NE
— 402-925 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9631 ATKINSON NE
— 402-926 1XXX6XXX8XXX9XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-927 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-930 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-935 8XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-943 6XXX7XXX8XXX9XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-955 9XXX which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-962 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE
— 402-963 not yet reported which blocks → QWEST CORPORATION 9631 OMAHA NE

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.