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
— 801-879 0XXX1XXX2XXX which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-880 not yet reported which blocks → ONVOY, LLC - UT 871E SALT LAKE UT
— 801-881 not yet reported which blocks → ONVOY, LLC - UT 871E OGDEN UT
— 801-883 8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-884 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-885 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
— 801-886 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-887 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-891 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
— 801-892 1XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MURRAY UT
— 801-894 3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPANIHFORK UT
— 801-896 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-897 not yet reported which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-898 not yet reported which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-902 9XXX which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-904 none assigned yet which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 MURRAY UT
— 801-905 1XXX8XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 MURRAY UT
— 801-906 1XXX3XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 SALT LAKE UT
— 801-907 0XXX1XXX5XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 SALT LAKE UT
— 801-908 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-910 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
— 801-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX UT
— 801-912 9XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT
— 801-913 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
— 801-914 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 MURRAY UT
— 801-915 not yet reported which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-916 not yet reported which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-917 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OGDEN UT
— 801-918 2XXX which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-920 2XXX which blocks → T-MOBILE USA, INC. 6529 OGDEN UT
— 801-921 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 PROVO UT
— 801-922 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLEASATGRV UT
— 801-924 4XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
— 801-925 0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PAYSON UT
— 801-926 4XXX5XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLEARFIELD UT
— 801-927 0XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KAYSVILLE UT
— 801-930 0–9 XXXall 10 · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT
— 801-932 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PROVO UT
— 801-933 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-934 0XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FARMINGTON UT
— 801-936 not yet reported which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-937 1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
— 801-938 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
— 801-939 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FARMINGTON UT
— 801-940 3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 OGDEN UT
— 801-941 not yet reported which blocks → T-MOBILE USA, INC. 6529 OGDEN 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
— 801-945 not yet reported which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE 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.