NumberResearchThousands-blocks in 308-730
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 308-730 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
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 308-730-0XXX | 0000–0999 | Reserved | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE | 5807 | ORD | NE |
| — | 308-730-1XXX | 1000–1999 | Reserved | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE | 5807 | ORD | NE |
| — | 308-730-2XXX | 2000–2999 | Reserved | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE | 5807 | ORD | NE |
| — | 308-730-3XXX | 3000–3999 | Available | ORD | NE | ||
| 2019-11-25 | 308-730-4XXX | 4000–4999 | Assigned | ONVOY, LLC - NE | 549E | ORD | NE |
| 2020-09-09 | 308-730-5XXX | 5000–5999 | Assigned | ONVOY, LLC - NE | 549E | ORD | NE |
| 2015-04-20 | 308-730-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ORD | NE |
| 2011-07-13 | 308-730-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE | 5807 | ORD | NE |
| 2009-03-03 | 308-730-8XXX | 8000–8999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | ORD | NE |
| 2010-03-05 | 308-730-9XXX | 9000–9999 | Assigned | N.E. COLORADO CELLULAR, INC. | 6874 | ORD | NE |
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.