NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 409-316

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 409-316 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 409 blocks

Most active assignees, all time — NPA 409
LEVEL 3 COMMUNICATIONS, LLC - TX 3
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 3
COMCAST IP PHONE, LLC 2
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 1
IP HORIZON LLC 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
— 409-316-0XXX 0000–0999Reserved FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 HTCHCCKSNF TX
— 409-316-1XXX 1000–1999Reserved FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 HTCHCCKSNF TX
— 409-316-2XXX 2000–2999Reserved FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 HTCHCCKSNF TX
2008-11-07 409-316-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HTCHCCKSNF TX
2005-09-07 409-316-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HTCHCCKSNF TX
2011-05-12 409-316-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HTCHCCKSNF TX
2006-09-14 409-316-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 HTCHCCKSNF TX
2011-12-15 409-316-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HTCHCCKSNF TX
2015-02-26 409-316-8XXX 8000–8999Assigned IP HORIZON LLC 515J HTCHCCKSNF TX
2007-04-05 409-316-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J HTCHCCKSNF TX

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.