NumberResearchThousands-blocks in 608-404
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 608-404 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 608 blocks
Most active assignees, all time — NPA 608
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 608-404-0XXX | 0000–0999 | Reserved | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | WISCONDLLS | WI |
| — | 608-404-1XXX | 1000–1999 | Reserved | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | WISCONDLLS | WI |
| — | 608-404-2XXX | 2000–2999 | Reserved | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | WISCONDLLS | WI |
| 2018-05-15 | 608-404-3XXX | 3000–3999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | WISCONDLLS | WI |
| 2017-04-10 | 608-404-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | WISCONDLLS | WI |
| 2019-07-24 | 608-404-5XXX | 5000–5999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 7216 | WISCONDLLS | WI |
| 2016-08-03 | 608-404-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - WI | 6274 | WISCONDLLS | WI |
| 2020-04-07 | 608-404-7XXX | 7000–7999 | Assigned | ONVOY, LLC - WI | 225C | WISCONDLLS | WI |
| 2021-03-08 | 608-404-8XXX | 8000–8999 | Assigned | ONVOY, LLC - WI | 225C | WISCONDLLS | WI |
| 2021-03-08 | 608-404-9XXX | 9000–9999 | Assigned | ONVOY, LLC - WI | 225C | WISCONDLLS | WI |
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.