NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 972-212

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 972-212 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 972 blocks

Most active assignees, all time — NPA 972
MCIMETRO ACCESS TRANSMISSION SERVICES LLC 4
GRANDE COMMUNICATIONS NETWORKS, INC. - TX 4
TWC IP ENABLED SERVICES, LLC 1
LEVEL 3 COMMUNICATIONS, 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
— 972-212-0XXX 0000–0999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 PLANO TX
— 972-212-1XXX 1000–1999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 PLANO TX
— 972-212-2XXX 2000–2999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 PLANO TX
— 972-212-3XXX 3000–3999Reserved GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 PLANO TX
2009-11-23 972-212-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K PLANO TX
2009-12-07 972-212-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PLANO TX
2008-09-02 972-212-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLANO TX
2006-08-17 972-212-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLANO TX
2006-08-17 972-212-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLANO TX
2008-09-02 972-212-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PLANO 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.