NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 512-546

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 512-546 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 512 blocks

Most active assignees, all time — NPA 512
GRANDE COMMUNICATIONS NETWORKS, INC. - TX 6
BANDWIDTH.COM CLEC, LLC - TX 2
PEERLESS NETWORK OF TEXAS, LLC - TX 1
EVOLVE CELLULAR, INC. 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
— 512-546-0XXX 0000–0999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 DALE/LTNSP TX
— 512-546-1XXX 1000–1999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 DALE/LTNSP TX
— 512-546-2XXX 2000–2999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 DALE/LTNSP TX
2014-10-31 512-546-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F DALE/LTNSP TX
— 512-546-4XXX 4000–4999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 DALE/LTNSP TX
— 512-546-5XXX 5000–5999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 DALE/LTNSP TX
2016-03-07 512-546-6XXX 6000–6999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F DALE/LTNSP TX
2012-05-17 512-546-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F DALE/LTNSP TX
— 512-546-8XXX 8000–8999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 DALE/LTNSP TX
2008-08-07 512-546-9XXX 9000–9999Assigned EVOLVE CELLULAR, INC. 139F DALE/LTNSP 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.