NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 601-850

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 601-850 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 601 blocks

Most active assignees, all time — NPA 601
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 5
CELLULAR SOUTH, INC. 4
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 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
2007-10-11 601-850-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 JACKSON MS
2007-10-11 601-850-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 JACKSON MS
2007-10-11 601-850-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 JACKSON MS
2007-10-11 601-850-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 JACKSON MS
2007-10-11 601-850-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 JACKSON MS
— 601-850-5XXX 5000–5999Reserved BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 JACKSON MS
2007-12-07 601-850-6XXX 6000–6999Assigned CELLULAR SOUTH, INC. 6581 JACKSON MS
2007-10-25 601-850-7XXX 7000–7999Assigned CELLULAR SOUTH, INC. 6581 JACKSON MS
2007-10-31 601-850-8XXX 8000–8999Assigned CELLULAR SOUTH, INC. 6581 JACKSON MS
2007-10-31 601-850-9XXX 9000–9999Assigned CELLULAR SOUTH, INC. 6581 JACKSON MS

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.