NumberResearchThousands-blocks in 585-561
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 585-561 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
Aug 2026
Jul 2026
Jun 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-04-20 | 585-561-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | NAPLES | NY |
| 2024-12-18 | 585-561-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NAPLES | NY |
| — | 585-561-2XXX | 2000–2999 | Available | NAPLES | NY | ||
| — | 585-561-3XXX | 3000–3999 | Available | NAPLES | NY | ||
| — | 585-561-4XXX | 4000–4999 | Available | NAPLES | NY | ||
| — | 585-561-5XXX | 5000–5999 | Available | NAPLES | NY | ||
| — | 585-561-6XXX | 6000–6999 | Available | NAPLES | NY | ||
| — | 585-561-7XXX | 7000–7999 | Available | NAPLES | NY | ||
| — | 585-561-8XXX | 8000–8999 | Available | NAPLES | NY | ||
| 2023-11-22 | 585-561-9XXX | 9000–9999 | Assigned | PEERING HUB, INC. - NY | 818H | NAPLES | NY |
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.