NumberResearchThousands-blocks in 585-476
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 585-476 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 |
|---|---|---|---|---|---|---|---|
| 2024-12-17 | 585-476-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | DALTON | NY |
| 2019-08-12 | 585-476-1XXX | 1000–1999 | Assigned | ONVOY, LLC- NY | 384C | DALTON | NY |
| — | 585-476-2XXX | 2000–2999 | Reserved | CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY | 0096 | DALTON | NY |
| 2019-08-12 | 585-476-3XXX | 3000–3999 | Assigned | ONVOY, LLC- NY | 384C | DALTON | NY |
| 2012-03-09 | 585-476-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | DALTON | NY |
| — | 585-476-5XXX | 5000–5999 | Reserved | CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY | 0096 | DALTON | NY |
| 2014-09-03 | 585-476-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | DALTON | NY |
| 2010-06-01 | 585-476-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | DALTON | NY |
| 2017-03-15 | 585-476-8XXX | 8000–8999 | Assigned | ONVOY, LLC- NY | 384C | DALTON | NY |
| — | 585-476-9XXX | 9000–9999 | Reserved | CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY | 0096 | DALTON | 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.