NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 256-223

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 256-223 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
ONVOY, LLC - AL 3
METROPCS, INC. 3
POWERTEL BIRMINGHAM LICENSES, INC. 1
CORETEL ALABAMA, INC. - AL 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - 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
— 256-223-0XXX 0000–0999Reserved METROPCS, INC. 5562 TALLADEGA AL
— 256-223-1XXX 1000–1999Reserved METROPCS, INC. 5562 TALLADEGA AL
— 256-223-2XXX 2000–2999Reserved METROPCS, INC. 5562 TALLADEGA AL
2012-09-17 256-223-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - AL 072F TALLADEGA AL
2017-08-16 256-223-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 TALLADEGA AL
2019-04-05 256-223-5XXX 5000–5999Assigned CORETEL ALABAMA, INC. - AL 476F TALLADEGA AL
— 256-223-6XXX 6000–6999Reserved POWERTEL BIRMINGHAM LICENSES, INC. 7475 TALLADEGA AL
2024-02-09 256-223-7XXX 7000–7999Assigned ONVOY, LLC - AL 604E TALLADEGA AL
2021-09-03 256-223-8XXX 8000–8999Assigned ONVOY, LLC - AL 604E TALLADEGA AL
2020-08-17 256-223-9XXX 9000–9999Assigned ONVOY, LLC - AL 604E TALLADEGA 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.