NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 501-722

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 501-722 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 501 blocks

Most active assignees, all time — NPA 501
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 3
WINDSTREAM COMMUNICATIONS, INC. - AR 2
LEVEL 3 COMMUNICATIONS, LLC - AR 2
T-MOBILE USA, INC. 1
NEW CINGULAR WIRELESS PCS, LLC - IL 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
— 501-722-0XXX 0000–0999Reserved WINDSTREAM COMMUNICATIONS, INC. - AR 7656 BENTON AR
— 501-722-1XXX 1000–1999Reserved WINDSTREAM COMMUNICATIONS, INC. - AR 7656 BENTON AR
2010-09-16 501-722-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BENTON AR
2010-03-10 501-722-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BENTON AR
2011-01-03 501-722-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BENTON AR
2011-06-03 501-722-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BENTON AR
2011-09-22 501-722-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - AR 5179 BENTON AR
2010-06-11 501-722-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BENTON AR
2010-06-11 501-722-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BENTON AR
2014-01-30 501-722-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF ARKANSAS, LLC - AR 7264 BENTON AR

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.