NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 251-200

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 251-200 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 251 blocks

Most active assignees, all time — NPA 251
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 5
LEVEL 3 COMMUNICATIONS, LLC - AL 2
NEW CINGULAR WIRELESS PCS, LLC - GA 1
METROPCS, INC. 1
MCC TELEPHONY OF THE SOUTH, LLC - AL 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
2010-12-13 251-200-0XXX 0000–0999Assigned MCC TELEPHONY OF THE SOUTH, LLC - AL 773F FOLEY AL
2016-05-09 251-200-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FOLEY AL
2016-07-05 251-200-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FOLEY AL
2016-10-18 251-200-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FOLEY AL
2018-10-31 251-200-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 FOLEY AL
2020-04-28 251-200-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 FOLEY AL
2024-01-04 251-200-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FOLEY AL
2020-12-08 251-200-7XXX 7000–7999Assigned METROPCS, INC. 5562 FOLEY AL
2021-03-16 251-200-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FOLEY AL
2021-03-16 251-200-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FOLEY AL

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.