NumberResearchThousands-blocks in 859-403
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 859-403 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 859 blocks
Most active assignees, all time — NPA 859
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 859-403-0XXX | 0000–0999 | Available | MIDWAY | KY | ||
| — | 859-403-1XXX | 1000–1999 | Available | MIDWAY | KY | ||
| 2007-07-13 | 859-403-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | MIDWAY | KY |
| 2014-03-31 | 859-403-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - KY | 4369 | MIDWAY | KY |
| — | 859-403-4XXX | 4000–4999 | Available | MIDWAY | KY | ||
| — | 859-403-5XXX | 5000–5999 | Available | MIDWAY | KY | ||
| — | 859-403-6XXX | 6000–6999 | Available | MIDWAY | KY | ||
| — | 859-403-7XXX | 7000–7999 | Available | MIDWAY | KY | ||
| 2020-06-18 | 859-403-8XXX | 8000–8999 | Assigned | TELNYX LLC | 073H | MIDWAY | KY |
| 2024-02-06 | 859-403-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MIDWAY | KY |
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.