NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 660
FRACTEL, LLC 16
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
2020-09-11 660-724 6XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H UNIONVILLE MO
2020-09-11 660-732 0XXX5XXX · 2 holders which blocks → FRACTEL, LLC 965H WYACONDA MO
2020-09-11 660-758 6XXX which blocks → FRACTEL, LLC 965H MT MORIAH MO
2020-09-11 660-842 5XXX which blocks → FRACTEL, LLC 965H POWERSVL MO
2020-09-10 660-599 5XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H LAREDO MO
2020-09-02 660-500 0XXX1XXX5XXX · 3 holders which blocks → FRACTEL, LLC 965H ETHEL MO
2020-09-02 660-566 5XXX6XXX · 2 holders which blocks → FRACTEL, LLC 965H CLEARMONT MO
2020-09-01 660-400 0XXX4XXX · 2 holders which blocks → FRACTEL, LLC 965H HALE MO
2020-09-01 660-633 3XXX6XXX · 2 holders which blocks → FRACTEL, LLC 965H BRIMSON MO
2020-09-01 660-855 0XXX1XXX2XXX5XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H BLOMINGTON MO
2019-12-05 660-356 1XXX2XXX3XXX4XXX7XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H HIGGINSVL MO
2019-08-01 660-300 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H GRANT CITY MO
2019-08-01 660-444 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H GLASGOW MO
2019-08-01 660-800 0XXX1XXX5XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H CHILLICOTH MO
2019-08-01 660-900 0XXX1XXX2XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WARSAW MO
2019-01-31 660-600 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SEDALIA MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.