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
— 801-674 0XXX1XXX2XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-675 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 OGDEN UT
— 801-679 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J MIDVALE UT
— 801-680 none assigned yet which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-681 not yet reported which blocks → ONVOY, LLC - UT 871E OGDEN UT
— 801-684 0–9 XXXwhole prefix which blocks → FIRSTDIGITAL TELECOM, LLC - UT 5727 MIDVALE UT
— 801-685 1XXX3XXX which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-689 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-690 4XXX5XXX6XXX7XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 OGDEN UT
— 801-693 1XXX4XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9636 BOUNTIFUL UT
— 801-694 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
— 801-697 not yet reported which blocks → ONVOY, LLC - UT 871E OGDEN UT
— 801-698 8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
— 801-699 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
— 801-700 not yet reported which blocks → UT
— 801-703 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → AT&T - LOCAL 7421 SALT LAKE UT
— 801-705 5XXX6XXX which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 PROVO UT
— 801-706 not yet reported which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-710 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
— 801-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX UT
— 801-713 not yet reported which blocks → PAETEC ITEL, LLC 829J MURRAY UT
— 801-714 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-715 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-717 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PROVO UT
— 801-718 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
— 801-720 not yet reported which blocks → ONVOY, LLC - UT 871E OGDEN UT
— 801-721 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
— 801-722 4XXX5XXX8XXX9XXX which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-723 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPANIHFORK UT
— 801-724 1XXX6XXX · 2 holders which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-725 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
— 801-726 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
— 801-728 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-729 not yet reported which blocks → ONVOY, LLC - UT 871E OGDEN UT
— 801-730 not yet reported which blocks → ONVOY, LLC - UT 871E OGDEN UT
— 801-731 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-732 5XXX7XXX · 2 holders which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-733 not yet reported which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-734 0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PROVO UT
— 801-735 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → XO UTAH, INC. 7541 PROVO UT
— 801-736 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
— 801-737 6XXX which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-739 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
— 801-740 not yet reported which blocks → ONVOY, LLC - UT 871E OGDEN UT
— 801-741 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-742 1XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → QWEST CORPORATION 9636 ALTA UT
— 801-743 not yet reported which blocks → QWEST CORPORATION 9636 MURRAY UT
— 801-744 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-745 5XXX7XXX which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-746 1XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 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.