NumberResearchThousands-blocks in 585-408
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 585-408 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 585 blocks
Most active assignees, all time — NPA 585
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-12-11 | 585-408-0XXX | 0000–0999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ARCADE | NY |
| 2017-04-18 | 585-408-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | ARCADE | NY |
| — | 585-408-2XXX | 2000–2999 | Available | ARCADE | NY | ||
| 2021-03-31 | 585-408-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ARCADE | NY |
| — | 585-408-4XXX | 4000–4999 | Available | ARCADE | NY | ||
| 2022-02-11 | 585-408-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ARCADE | NY |
| 2021-10-11 | 585-408-6XXX | 6000–6999 | Assigned | PEERING HUB, INC. - NY | 818H | ARCADE | NY |
| 2021-10-29 | 585-408-7XXX | 7000–7999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ARCADE | NY |
| 2021-10-29 | 585-408-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ARCADE | NY |
| 2022-02-11 | 585-408-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ARCADE | NY |
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.