NumberResearchThousands-blocks in 608-839
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 608-839 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2004-01-21 | 608-839-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | COTTAGEGRV | WI |
| — | 608-839-1XXX | 1000–1999 | Reserved | FRONTIER NORTH INC. - WI | 0886 | COTTAGEGRV | WI |
| 2008-05-12 | 608-839-2XXX | 2000–2999 | Assigned | FRONTIER NORTH INC. - WI | 0886 | COTTAGEGRV | WI |
| — | 608-839-3XXX | 3000–3999 | Reserved | FRONTIER NORTH INC. - WI | 0886 | COTTAGEGRV | WI |
| — | 608-839-4XXX | 4000–4999 | Reserved | FRONTIER NORTH INC. - WI | 0886 | COTTAGEGRV | WI |
| — | 608-839-5XXX | 5000–5999 | Reserved | FRONTIER NORTH INC. - WI | 0886 | COTTAGEGRV | WI |
| 2012-05-01 | 608-839-6XXX | 6000–6999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | COTTAGEGRV | WI |
| 2012-03-30 | 608-839-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | COTTAGEGRV | WI |
| — | 608-839-8XXX | 8000–8999 | Reserved | FRONTIER NORTH INC. - WI | 0886 | COTTAGEGRV | WI |
| — | 608-839-9XXX | 9000–9999 | Reserved | FRONTIER NORTH INC. - WI | 0886 | COTTAGEGRV | WI |
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.