NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 484-512

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 484-512 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 484 blocks

Most active assignees, all time — NPA 484
THE VOICE APPLICATION NETWORK, LLC 7
NUSO, LLC 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 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
2016-05-25 484-512-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
2016-08-18 484-512-1XXX 1000–1999Assigned THE VOICE APPLICATION NETWORK, LLC 507J READING PA
2016-08-18 484-512-2XXX 2000–2999Assigned THE VOICE APPLICATION NETWORK, LLC 507J READING PA
2016-07-11 484-512-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 7434 READING PA
2016-08-18 484-512-4XXX 4000–4999Assigned THE VOICE APPLICATION NETWORK, LLC 507J READING PA
2016-08-18 484-512-5XXX 5000–5999Assigned THE VOICE APPLICATION NETWORK, LLC 507J READING PA
2016-08-18 484-512-6XXX 6000–6999Assigned THE VOICE APPLICATION NETWORK, LLC 507J READING PA
2016-08-18 484-512-7XXX 7000–7999Assigned THE VOICE APPLICATION NETWORK, LLC 507J READING PA
2016-08-18 484-512-8XXX 8000–8999Assigned THE VOICE APPLICATION NETWORK, LLC 507J READING PA
2016-08-24 484-512-9XXX 9000–9999Assigned NUSO, LLC 551G READING PA

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.