NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 931-387

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 931-387 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 931 blocks

Most active assignees, all time — NPA 931
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 4
TELNYX LLC 1
ONVOY, LLC - TN 1
CHARTER IP ENABLED SERVICES, LLC 1
CENTURYLINK COMMUNICATIONS, 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
— 931-387-0XXX 0000–0999Reserved BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 CUNNINGHAM TN
2006-06-08 931-387-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CUNNINGHAM TN
— 931-387-2XXX 2000–2999Reserved BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 CUNNINGHAM TN
— 931-387-3XXX 3000–3999Reserved BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 CUNNINGHAM TN
— 931-387-4XXX 4000–4999Reserved BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 CUNNINGHAM TN
2011-05-20 931-387-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CUNNINGHAM TN
2011-05-25 931-387-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TN 124F CUNNINGHAM TN
2014-02-20 931-387-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CUNNINGHAM TN
2015-10-01 931-387-8XXX 8000–8999Assigned ONVOY, LLC - TN 525E CUNNINGHAM TN
2019-05-09 931-387-9XXX 9000–9999Assigned TELNYX LLC 073H CUNNINGHAM TN

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.