NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 337-390

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 337-390 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 337 blocks

Most active assignees, all time — NPA 337
VOICESTREAM GSM I, LLC 4
2
TERRA NOVA TELECOM INC. 1
TELEPORT COMMUNICATIONS AMERICA LA - LLC 1
CHARTER IP ENABLED SERVICES, 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
2021-03-01 337-390-0XXX 0000–0999Assigned VOICESTREAM GSM I, LLC 150C KINDER LA
— 337-390-1XXX 1000–1999Reserved VOICESTREAM GSM I, LLC 150C KINDER LA
2022-12-02 337-390-2XXX 2000–2999Assigned VOICESTREAM GSM I, LLC 150C KINDER LA
2022-12-02 337-390-3XXX 3000–3999Assigned VOICESTREAM GSM I, LLC 150C KINDER LA
2017-07-18 337-390-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C KINDER LA
2025-01-16 337-390-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KINDER LA
— 337-390-6XXX 6000–6999Available KINDER LA
2014-08-08 337-390-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KINDER LA
— 337-390-8XXX 8000–8999Available KINDER LA
2025-04-29 337-390-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J KINDER LA

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.