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
— 801-375 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-376 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
— 801-377 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-378 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-379 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-380 3XXX4XXX5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
— 801-381 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-382 7XXX8XXX9XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT
— 801-383 0XXX2XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 BOUNTIFUL UT
— 801-387 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-388 5XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
— 801-389 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
— 801-390 2XXX which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
— 801-391 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 OGDEN UT
— 801-392 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-393 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-394 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-395 4XXX which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-397 not yet reported which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-398 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-399 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-400 3XXX4XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
— 801-401 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 SALT LAKE UT
— 801-402 not yet reported which blocks → QWEST CORPORATION 9636 FARMINGTON UT
— 801-403 0XXX1XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-404 2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
— 801-405 3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PAYSON UT
— 801-406 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 PLEASATGRV UT
— 801-407 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEHI UT
— 801-408 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-409 none assigned yet which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 OGDEN UT
— 801-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX UT
— 801-412 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-413 3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
— 801-414 2XXX which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-415 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
— 801-416 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLEARFIELD UT
— 801-417 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
— 801-418 9XXX which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-420 8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
— 801-421 0–9 XXXwhole prefix which blocks → ONVOY, LLC - UT 871E MIDVALE UT
— 801-423 5XXX which blocks → QWEST CORPORATION 9636 SPANIHFORK UT
— 801-424 5XXX6XXX7XXX · 3 holders which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-426 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-427 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
— 801-428 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
— 801-429 9XXX which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-431 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-433 4XXX7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
— 801-434 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.