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 337
TON80 COMMUNICATIONS, LLC 13
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
2022-02-24 337-748 0XXX1XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WASHINGTON LA
2022-02-22 337-742 0XXX1XXX5XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BALDWIN LA
2022-02-22 337-768 1XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ROANOKE LA
2022-02-22 337-848 0XXX1XXX2XXX4XXX5XXX8XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SUNSET LA
2022-02-07 337-627 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BREAUX BDG LA
2022-01-31 337-832 0–9 XXXall 10 · 8 holders which blocks → TON80 COMMUNICATIONS, LLC 516J STMARTINVL LA
2022-01-28 337-722 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LK CHARLES LA
2022-01-27 337-586 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WEEKS IS LA
2022-01-27 337-674 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SULPHUR LA
2022-01-27 337-727 1XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PINEPRAIRI LA
2022-01-27 337-746 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CARLYSS LA
2022-01-27 337-767 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CROWLEY LA
2022-01-27 337-846 0XXX1XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JEANERETTE LA

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.