Thousands-blocks in 337-548

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 337-548 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 337 blocks

Most active assignees, all time — NPA 337

ONVOY, LLC - LA 2

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 1

LOUISIANA COMPETITIVE TELECOMMUNICATIONS, INC. 1

LEVEL 3 COMMUNICATIONS, LLC - LA 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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2012-04-24	337-548-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - LA	153F	LAKEARTHUR	LA
2014-04-01	337-548-1XXX	1000–1999	Assigned	LOUISIANA COMPETITIVE TELECOMMUNICATIONS, INC.	4930	LAKEARTHUR	LA
2016-03-07	337-548-2XXX	2000–2999	Assigned	ONVOY, LLC - LA	749E	LAKEARTHUR	LA
2010-01-14	337-548-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	LAKEARTHUR	LA
2016-03-07	337-548-4XXX	4000–4999	Assigned	ONVOY, LLC - LA	749E	LAKEARTHUR	LA
2011-08-15	337-548-5XXX	5000–5999	Assigned	AT&T ENTERPRISES, LLC	516C	LAKEARTHUR	LA
—	337-548-6XXX	6000–6999	Available			LAKEARTHUR	LA
2014-08-08	337-548-7XXX	7000–7999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	LAKEARTHUR	LA
2024-04-05	337-548-8XXX	8000–8999	Assigned	IP HORIZON LLC	515J	LAKEARTHUR	LA
2014-06-20	337-548-9XXX	9000–9999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - LA	3232	LAKEARTHUR	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.