NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 504-666

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 504-666 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
VOICESTREAM GSM I, LLC 3
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 3
METROPCS, INC. 2
ONVOY, LLC - LA 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
— 504-666-0XXX 0000–0999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEWORLEANS LA
— 504-666-1XXX 1000–1999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEWORLEANS LA
— 504-666-2XXX 2000–2999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - LA 6505 NEWORLEANS LA
2018-12-06 504-666-3XXX 3000–3999Assigned ONVOY, LLC - LA 749E NEWORLEANS LA
2014-03-03 504-666-4XXX 4000–4999Assigned VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2014-02-18 504-666-5XXX 5000–5999Assigned METROPCS, INC. 5562 NEWORLEANS LA
2014-02-18 504-666-6XXX 6000–6999Assigned METROPCS, INC. 5562 NEWORLEANS LA
2014-03-03 504-666-7XXX 7000–7999Assigned VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2014-03-03 504-666-8XXX 8000–8999Assigned VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2014-02-18 504-666-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - LA 153F NEWORLEANS 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.