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
T-MOBILE USA, INC. 91
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 69
NEW CINGULAR WIRELESS PCS, LLC 62
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 50
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
— 801-322 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-323 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-324 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
— 801-325 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-326 0XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
— 801-327 8XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MURRAY UT
— 801-328 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-329 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 MURRAY UT
— 801-331 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEHI 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
— 801-335 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOUNTIFUL UT
— 801-336 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KAYSVILLE UT
— 801-337 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OGDEN UT
— 801-338 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 MURRAY UT
— 801-339 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 MURRAY UT
— 801-340 not yet reported which blocks → ONVOY, LLC - UT 871E 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
— 801-345 not yet reported which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 PROVO UT
— 801-346 0–9 XXXwhole prefix which blocks → ONVOY, LLC - UT 871E MIDVALE UT
— 801-347 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
— 801-348 0–9 XXXwhole prefix which blocks → ONVOY, LLC - UT 871E OGDEN 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
— 801-358 2XXX which blocks → T-MOBILE USA, INC. 6529 PROVO UT
— 801-359 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-360 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
— 801-361 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
— 801-362 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO 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
— 801-365 none assigned yet which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT
— 801-366 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-367 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
— 801-368 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
— 801-369 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
— 801-370 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-371 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-372 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
— 801-373 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-374 not yet reported which blocks → QWEST CORPORATION 9636 PROVO 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.