NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 318-604

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 318-604 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 318 blocks

Most active assignees, all time — NPA 318
6
TELEPORT COMMUNICATIONS AMERICA LA - LLC 1
CSC VOICE, LLC 1
CENTURYLINK COMMUNICATIONS, LLC 1
BANDWIDTH.COM CLEC, LLC - LA 1
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
— 318-604-0XXX 0000–0999Available COTTONPORT LA
— 318-604-1XXX 1000–1999Available COTTONPORT LA
— 318-604-2XXX 2000–2999Available COTTONPORT LA
— 318-604-3XXX 3000–3999Available COTTONPORT LA
— 318-604-4XXX 4000–4999Available COTTONPORT LA
— 318-604-5XXX 5000–5999Available COTTONPORT LA
2020-10-09 318-604-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C COTTONPORT LA
2014-01-07 318-604-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COTTONPORT LA
2024-02-26 318-604-8XXX 8000–8999Assigned CSC VOICE, LLC 612K COTTONPORT LA
2020-01-13 318-604-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F COTTONPORT LA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.