Thousands-blocks in 504-353

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 504-353 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 504 blocks

Most active assignees, all time — NPA 504

ONVOY, LLC - LA 2

NEW CINGULAR WIRELESS PCS, LLC - GA 2

HUNT TELECOMMUNICATIONS, LLC - LA 2

COMCAST IP PHONE, LLC 2

LEVEL 3 COMMUNICATIONS, 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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
—	504-353-0XXX	0000–0999	Reserved	HUNT TELECOMMUNICATIONS, LLC - LA	181D	KENNER	LA
2017-02-16	504-353-1XXX	1000–1999	Assigned	COMCAST IP PHONE, LLC	318J	KENNER	LA
2017-06-15	504-353-2XXX	2000–2999	Assigned	COMCAST IP PHONE, LLC	318J	KENNER	LA
—	504-353-3XXX	3000–3999	Reserved	HUNT TELECOMMUNICATIONS, LLC - LA	181D	KENNER	LA
2019-06-14	504-353-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	KENNER	LA
2019-06-14	504-353-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	KENNER	LA
2019-07-09	504-353-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - LA	153F	KENNER	LA
2020-11-05	504-353-7XXX	7000–7999	Assigned	ONVOY, LLC - LA	749E	KENNER	LA
2006-04-03	504-353-8XXX	8000–8999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - LA	3232	KENNER	LA
2019-05-06	504-353-9XXX	9000–9999	Assigned	ONVOY, LLC - LA	749E	KENNER	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.