NumberResearchThousands-blocks in 585-534
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 585-534 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 585-534-0XXX | 0000–0999 | Reserved | FRONTIER TELEPHONE OF ROCHESTER, INC. | 0121 | ATLANTA | NY |
| 2020-12-22 | 585-534-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | ATLANTA | NY |
| 2019-08-12 | 585-534-2XXX | 2000–2999 | Assigned | ONVOY, LLC- NY | 384C | ATLANTA | NY |
| 2019-08-12 | 585-534-3XXX | 3000–3999 | Assigned | ONVOY, LLC- NY | 384C | ATLANTA | NY |
| — | 585-534-4XXX | 4000–4999 | Available | ATLANTA | NY | ||
| — | 585-534-5XXX | 5000–5999 | Reserved | FRONTIER TELEPHONE OF ROCHESTER, INC. | 0121 | ATLANTA | NY |
| 2014-09-03 | 585-534-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | ATLANTA | NY |
| 2010-12-06 | 585-534-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ATLANTA | NY |
| 2017-03-14 | 585-534-8XXX | 8000–8999 | Assigned | ONVOY, LLC- NY | 384C | ATLANTA | NY |
| — | 585-534-9XXX | 9000–9999 | Reserved | FRONTIER TELEPHONE OF ROCHESTER, INC. | 0121 | ATLANTA | 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.