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
— 801-947 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-948 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
— 801-949 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-950 not yet reported which blocks → UT
— 801-951 0XXX6XXX8XXX9XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOUNTIFUL UT
— 801-952 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-953 0XXX1XXX2XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 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
— 801-958 not yet reported which blocks → UT
— 801-959 not yet reported which blocks → 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
— 801-971 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE 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
— 801-976 not yet reported which blocks → 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
— 801-979 not yet reported which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-981 2XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 MIDVALE UT
— 801-982 5XXX6XXX8XXX which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-983 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
— 801-984 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
— 801-985 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-986 not yet reported which blocks → SPOK, INC. 6630 SALT LAKE UT
— 801-987 0XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
— 801-988 0XXX4XXX5XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
— 801-990 6XXX7XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
— 801-991 0XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 KAYSVILLE UT
— 801-992 0XXX1XXX4XXX7XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 BOUNTIFUL UT
— 801-993 0XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
— 801-994 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
— 801-996 2XXX4XXX7XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 MIDVALE UT
— 801-997 0–9 XXXall 10 · 3 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT
— 801-998 0XXX2XXX7XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 MIDVALE UT
— 801-999 0XXX1XXX4XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - UT 7530 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.