NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 256-748

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 256-748 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
BRIGHTSPEED OF ALABAMA, LLC - NORTHERN 4
ONVOY, LLC - AL 3
TELNYX LLC 1
LEVEL 3 COMMUNICATIONS, LLC - AL 1
CORETEL ALABAMA, INC. - 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
2019-02-11 256-748-0XXX 0000–0999Assigned ONVOY, LLC - AL 604E LECTA AL
2019-02-11 256-748-1XXX 1000–1999Assigned ONVOY, LLC - AL 604E LECTA AL
— 256-748-2XXX 2000–2999Reserved BRIGHTSPEED OF ALABAMA, LLC - NORTHERN 9789 LECTA AL
— 256-748-3XXX 3000–3999Reserved BRIGHTSPEED OF ALABAMA, LLC - NORTHERN 9789 LECTA AL
— 256-748-4XXX 4000–4999Reserved BRIGHTSPEED OF ALABAMA, LLC - NORTHERN 9789 LECTA AL
2018-08-24 256-748-5XXX 5000–5999Assigned ONVOY, LLC - AL 604E LECTA AL
2019-04-05 256-748-6XXX 6000–6999Assigned CORETEL ALABAMA, INC. - AL 476F LECTA AL
2014-02-26 256-748-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - AL 5255 LECTA AL
— 256-748-8XXX 8000–8999Reserved BRIGHTSPEED OF ALABAMA, LLC - NORTHERN 9789 LECTA AL
2020-04-08 256-748-9XXX 9000–9999Assigned TELNYX LLC 073H LECTA 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.