NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 775-552

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 775-552 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 775 blocks

Most active assignees, all time — NPA 775
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 3
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV 2
TON80 COMMUNICATIONS, LLC 1
T-MOBILE USA, INC. 1
LEVEL 3 COMMUNICATIONS, LLC - NV 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
2022-07-12 775-552-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 GARDNERVL NV
— 775-552-1XXX 1000–1999Reserved FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - NV 4421 GARDNERVL NV
2022-03-14 775-552-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J GARDNERVL NV
2004-11-23 775-552-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV 7376 GARDNERVL NV
— 775-552-4XXX 4000–4999Available GARDNERVL NV
2013-05-15 775-552-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 GARDNERVL NV
2019-11-25 775-552-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NV 7376 GARDNERVL NV
2005-12-27 775-552-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 GARDNERVL NV
2026-07-14 775-552-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 GARDNERVL NV
2025-06-06 775-552-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 GARDNERVL NV

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.