NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 256-688

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 256-688 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 256 blocks

Most active assignees, all time — NPA 256
CORETEL ALABAMA, INC. - AL 3
BANDWIDTH.COM CLEC, LLC - AL 2
2
WINDSTREAM ALABAMA, INC. 1
FRACTEL, LLC 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
2020-01-21 256-688-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F CAMP HILL AL
2023-08-14 256-688-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 CAMP HILL AL
2019-04-04 256-688-2XXX 2000–2999Assigned CORETEL ALABAMA, INC. - AL 476F CAMP HILL AL
2026-08-18 256-688-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F CAMP HILL AL
— 256-688-4XXX 4000–4999Available CAMP HILL AL
— 256-688-5XXX 5000–5999Available CAMP HILL AL
2019-04-04 256-688-6XXX 6000–6999Assigned CORETEL ALABAMA, INC. - AL 476F CAMP HILL AL
2019-04-04 256-688-7XXX 7000–7999Assigned CORETEL ALABAMA, INC. - AL 476F CAMP HILL AL
2020-01-08 256-688-8XXX 8000–8999Assigned FRACTEL, LLC 965H CAMP HILL AL
2018-04-11 256-688-9XXX 9000–9999Assigned WINDSTREAM ALABAMA, INC. 0302 CAMP HILL AL

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.