NumberResearchThousands-blocks in 337-220
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 337-220 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
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-04-29 | 337-220-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | TURKEY CRK | LA |
| 2023-06-26 | 337-220-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | TURKEY CRK | LA |
| — | 337-220-2XXX | 2000–2999 | Assigned (pending) | TURKEY CRK | LA | ||
| — | 337-220-3XXX | 3000–3999 | Available | TURKEY CRK | LA | ||
| 2022-08-03 | 337-220-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - LA | 3232 | TURKEY CRK | LA |
| — | 337-220-5XXX | 5000–5999 | Available | TURKEY CRK | LA | ||
| — | 337-220-6XXX | 6000–6999 | Available | TURKEY CRK | LA | ||
| 2014-08-08 | 337-220-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | TURKEY CRK | LA |
| — | 337-220-8XXX | 8000–8999 | Available | TURKEY CRK | LA | ||
| — | 337-220-9XXX | 9000–9999 | Available | TURKEY CRK | LA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.