NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 541-220

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 541-220 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 541 blocks

Most active assignees, all time — NPA 541
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 4
NEW CINGULAR WIRELESS PCS, LLC 3
T-MOBILE USA, INC. 2
ALYRICA TELEPHONE LLC DBA NEXT GEN PHONE SYS-OR 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
2007-11-08 541-220-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ALBANY OR
2008-09-08 541-220-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ALBANY OR
2004-08-11 541-220-2XXX 2000–2999Assigned ALYRICA TELEPHONE LLC DBA NEXT GEN PHONE SYS-OR 9882 ALBANY OR
2009-09-14 541-220-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ALBANY OR
2008-10-29 541-220-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ALBANY OR
2009-03-09 541-220-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ALBANY OR
2011-04-21 541-220-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ALBANY OR
2011-04-05 541-220-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ALBANY OR
2009-10-08 541-220-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ALBANY OR
— 541-220-9XXX 9000–9999Reserved T-MOBILE USA, INC. 6529 ALBANY OR

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.