NumberResearchThousands-blocks in 608-563
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 608-563 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 |
|---|---|---|---|---|---|---|---|
| 2004-01-20 | 608-563-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JANESVILLE | WI |
| 2006-02-14 | 608-563-1XXX | 1000–1999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JANESVILLE | WI |
| 2006-12-21 | 608-563-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JANESVILLE | WI |
| 2015-01-08 | 608-563-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF WISCONSIN, LP - WI | 7322 | JANESVILLE | WI |
| 2005-05-03 | 608-563-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JANESVILLE | WI |
| 2008-04-25 | 608-563-5XXX | 5000–5999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | JANESVILLE | WI |
| 2014-11-03 | 608-563-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | JANESVILLE | WI |
| 2013-10-10 | 608-563-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | JANESVILLE | WI |
| 2013-10-15 | 608-563-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | JANESVILLE | WI |
| 2013-10-15 | 608-563-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | JANESVILLE | 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.