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
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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 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
— 801-754 2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9636 PAYSON UT
— 801-756 not yet reported which blocks → QWEST CORPORATION 9636 AMERCNFORK UT
— 801-762 6XXX7XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-763 not yet reported which blocks → QWEST CORPORATION 9636 AMERCNFORK UT
— 801-764 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-765 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-766 7XXX which blocks → QWEST CORPORATION 9636 LEHI UT
— 801-767 not yet reported which blocks → QWEST CORPORATION 9636 LEHI UT
— 801-768 5XXX6XXX · 2 holders which blocks → QWEST CORPORATION 9636 LEHI UT
— 801-771 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-772 2XXX6XXX7XXX8XXX9XXX which blocks → QWEST CORPORATION 9636 AMERCNFORK UT
— 801-773 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-774 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-775 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-776 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-777 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-778 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-779 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-782 not yet reported which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-785 not yet reported which blocks → QWEST CORPORATION 9636 PLEASATGRV UT
— 801-786 9XXX which blocks → QWEST CORPORATION 9636 OGDEN UT
— 801-794 5XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9636 SPANIHFORK UT
— 801-796 2XXX which blocks → QWEST CORPORATION 9636 PLEASATGRV UT
— 801-798 not yet reported which blocks → QWEST CORPORATION 9636 SPANIHFORK UT
— 801-799 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-802 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-812 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-816 6XXX7XXX which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-818 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-825 not yet reported which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-829 1XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9636 MORGAN UT
— 801-832 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-840 3XXX6XXX7XXX which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-844 1XXX which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-845 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9636 MORGAN UT
— 801-862 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-868 not yet reported which blocks → QWEST CORPORATION 9636 PROVO UT
— 801-876 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9636 MORGAN 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
— 801-886 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-887 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-896 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9636 CLEARFIELD UT
— 801-902 9XXX which blocks → QWEST CORPORATION 9636 MIDVALE UT
— 801-908 not yet reported which blocks → QWEST CORPORATION 9636 SALT LAKE UT
— 801-933 not yet reported which blocks → QWEST CORPORATION 9636 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.