NumberResearch Membership · Data 09/19/2026

Thousands-blocks in 256-742

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 256-742 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
NEW CINGULAR WIRELESS PCS, LLC - GA 4
4
TON80 COMMUNICATIONS, LLC 1
CHARTER IP ENABLED SERVICES, 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
2018-06-07 256-742-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ELKMONT AL
2020-03-11 256-742-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ELKMONT AL
2020-03-11 256-742-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ELKMONT AL
— 256-742-3XXX 3000–3999Available ELKMONT AL
— 256-742-4XXX 4000–4999Available ELKMONT AL
— 256-742-5XXX 5000–5999Available ELKMONT AL
2022-02-22 256-742-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J ELKMONT AL
— 256-742-7XXX 7000–7999Available ELKMONT AL
2026-04-03 256-742-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ELKMONT AL
2024-05-02 256-742-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ELKMONT 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.