NumberResearchThousands-blocks in 608-353
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 608-353 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
Aug 2026
Jul 2026
Jun 2026
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Dec 2025
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-01-22 | 608-353-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | MELROSE | WI |
| — | 608-353-1XXX | 1000–1999 | Available | MELROSE | WI | ||
| 2023-06-22 | 608-353-2XXX | 2000–2999 | Assigned | ONVOY, LLC - WI | 225C | MELROSE | WI |
| 2025-07-21 | 608-353-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | MELROSE | WI |
| — | 608-353-4XXX | 4000–4999 | Available | MELROSE | WI | ||
| — | 608-353-5XXX | 5000–5999 | Available | MELROSE | WI | ||
| — | 608-353-6XXX | 6000–6999 | Available | MELROSE | WI | ||
| — | 608-353-7XXX | 7000–7999 | Available | MELROSE | WI | ||
| 2025-02-28 | 608-353-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | MELROSE | WI |
| — | 608-353-9XXX | 9000–9999 | Available | MELROSE | 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.