NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 337-222

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 337-222 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
ONVOY, LLC - LA 3
NEW CINGULAR WIRELESS PCS, LLC - GA 2
CENTURYLINK COMMUNICATIONS, LLC 2
VOICESTREAM GSM I, LLC 1
TERRA NOVA TELECOM 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
2019-06-07 337-222-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DE QUINCY LA
— 337-222-1XXX 1000–1999Reserved METROPCS, INC. 5562 DE QUINCY LA
2016-11-08 337-222-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DE QUINCY LA
2019-08-01 337-222-3XXX 3000–3999Assigned ONVOY, LLC - LA 749E DE QUINCY LA
2019-10-21 337-222-4XXX 4000–4999Assigned ONVOY, LLC - LA 749E DE QUINCY LA
2019-10-21 337-222-5XXX 5000–5999Assigned ONVOY, LLC - LA 749E DE QUINCY LA
2025-04-29 337-222-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J DE QUINCY LA
2014-08-08 337-222-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DE QUINCY LA
2020-01-10 337-222-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DE QUINCY LA
— 337-222-9XXX 9000–9999Reserved VOICESTREAM GSM I, LLC 150C DE QUINCY 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.