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 801
QWEST CORPORATION 327
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 801-936 not yet reported which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-942 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-943 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-944 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-947 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-952 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-954 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-955 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-956 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-957 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-961 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-962 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-963 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-964 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-965 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-966 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-967 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-968 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-969 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-972 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-973 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-974 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-975 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-977 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-978 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-982 5XXX6XXX8XXX which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-985 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT

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.