NumberResearchThousands-blocks in 208-423
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 208-423 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 208 blocks
Most active assignees, all time — NPA 208
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-03-14 | 208-423-0XXX | 0000–0999 | Assigned | ONVOY, LLC - ID | 689F | TWIN FALLS | ID |
| 2012-09-06 | 208-423-1XXX | 1000–1999 | Assigned | ONVOY, LLC - ID | 689F | TWIN FALLS | ID |
| 2012-12-28 | 208-423-2XXX | 2000–2999 | Assigned | ONVOY, LLC - ID | 689F | TWIN FALLS | ID |
| 2012-12-28 | 208-423-3XXX | 3000–3999 | Assigned | ONVOY, LLC - ID | 689F | TWIN FALLS | ID |
| — | 208-423-4XXX | 4000–4999 | Reserved | QWEST CORPORATION | 9636 | TWIN FALLS | ID |
| — | 208-423-5XXX | 5000–5999 | Reserved | QWEST CORPORATION | 9636 | TWIN FALLS | ID |
| — | 208-423-6XXX | 6000–6999 | Reserved | QWEST CORPORATION | 9636 | TWIN FALLS | ID |
| 2010-10-15 | 208-423-7XXX | 7000–7999 | Assigned | ONVOY, LLC - ID | 689F | TWIN FALLS | ID |
| 2014-12-05 | 208-423-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - ID | 192F | TWIN FALLS | ID |
| — | 208-423-9XXX | 9000–9999 | Reserved | QWEST CORPORATION | 9636 | TWIN FALLS | ID |
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.