NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 281-595

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 281-595 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 281 blocks

Most active assignees, all time — NPA 281
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4
ONVOY, LLC - TX 3
TELEPORT COMMUNICATIONS AMERICA, LLC - TX 1
PEERLESS NETWORK OF TEXAS, LLC - TX 1
BANDWIDTH.COM CLEC, LLC - TX 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
2018-09-07 281-595-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F ROSHARON TX
2019-06-13 281-595-1XXX 1000–1999Assigned ONVOY, LLC - TX 903C ROSHARON TX
— 281-595-2XXX 2000–2999Reserved FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 ROSHARON TX
— 281-595-3XXX 3000–3999Reserved FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 ROSHARON TX
— 281-595-4XXX 4000–4999Reserved FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 ROSHARON TX
— 281-595-5XXX 5000–5999Reserved FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 ROSHARON TX
2017-07-18 281-595-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 ROSHARON TX
2013-09-03 281-595-7XXX 7000–7999Assigned ONVOY, LLC - TX 903C ROSHARON TX
2018-08-22 281-595-8XXX 8000–8999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F ROSHARON TX
2019-06-13 281-595-9XXX 9000–9999Assigned ONVOY, LLC - TX 903C ROSHARON TX

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.