NumberResearchThousands-blocks in 608-448
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 608-448 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 |
|---|---|---|---|---|---|---|---|
| 2005-12-12 | 608-448-0XXX | 0000–0999 | Assigned | TDS METROCOM, LLC | 520K | BARABOO | WI |
| 2007-07-19 | 608-448-1XXX | 1000–1999 | Assigned | T-MOBILE USA, INC. | 6529 | BARABOO | WI |
| 2004-10-26 | 608-448-2XXX | 2000–2999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BARABOO | WI |
| 2005-02-01 | 608-448-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | BARABOO | WI |
| 2006-10-11 | 608-448-4XXX | 4000–4999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | BARABOO | WI |
| 2004-04-13 | 608-448-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BARABOO | WI |
| 2008-10-22 | 608-448-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - WI | 007F | BARABOO | WI |
| 2010-07-16 | 608-448-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 6508 | BARABOO | WI |
| 2004-12-13 | 608-448-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | BARABOO | WI |
| — | 608-448-9XXX | 9000–9999 | Reserved | T-MOBILE USA, INC. | 6529 | BARABOO | 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.