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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 801-269 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-270 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-272 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-273 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-274 4XXX which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-277 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-278 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-280 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-281 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-282 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-284 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-287 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-288 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-292 not yet reported which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-293 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-294 not yet reported which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-295 not yet reported which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-296 not yet reported which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-297 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-298 not yet reported which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-299 not yet reported which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-302 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-304 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-312 0XXX1XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-313 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-314 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-320 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-321 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-322 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-323 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-325 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-328 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-332 0XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-333 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-334 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-342 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-343 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-344 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-350 1XXX which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-351 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-352 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-353 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-354 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-355 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-356 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-357 9XXX which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-359 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-363 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-364 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-366 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE 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.