NumberResearchThousands-blocks in 308-313
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
The ten 1,000-number thousand-blocks inside prefix 308-313 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 308 blocks
Most active assignees, all time — NPA 308
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-06-22 | 308-313-0XXX | 0000–0999 | Assigned | COMMIO, LLC | 939H | ALLIANCE | NE |
| — | 308-313-1XXX | 1000–1999 | Available | ALLIANCE | NE | ||
| 2022-12-30 | 308-313-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NE | 3233 | ALLIANCE | NE |
| 2015-01-14 | 308-313-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ALLIANCE | NE |
| — | 308-313-4XXX | 4000–4999 | Available | ALLIANCE | NE | ||
| 2010-02-23 | 308-313-5XXX | 5000–5999 | Assigned | MOBIUS COMMUNICATIONS COMPANY - NE | 9764 | ALLIANCE | NE |
| 2023-08-07 | 308-313-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - NE | 7144 | ALLIANCE | NE |
| 2014-12-08 | 308-313-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ALLIANCE | NE |
| 2024-08-14 | 308-313-8XXX | 8000–8999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | ALLIANCE | NE |
| — | 308-313-9XXX | 9000–9999 | Available | ALLIANCE | NE |
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.