NumberResearchThousands-blocks in 585-571
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 585-571 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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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-12-18 | 585-571-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | SCOTTSVL | NY |
| 2000-07-11 | 585-571-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | SCOTTSVL | NY |
| 2000-11-02 | 585-571-2XXX | 2000–2999 | Assigned | TC SYSTEMS, INC. - NY | 7140 | SCOTTSVL | NY |
| 2005-03-22 | 585-571-3XXX | 3000–3999 | Assigned | LEVEL 3 TELECOM OF NEW YORK, LP - NY | 8473 | SCOTTSVL | NY |
| 2003-12-23 | 585-571-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SCOTTSVL | NY |
| 2010-04-08 | 585-571-5XXX | 5000–5999 | Assigned | FRONTIER TELEPHONE OF ROCHESTER, INC. | 0121 | SCOTTSVL | NY |
| 2017-03-27 | 585-571-6XXX | 6000–6999 | Assigned | PAETEC ITEL, LLC | 829J | SCOTTSVL | NY |
| 2010-09-14 | 585-571-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | SCOTTSVL | NY |
| 2010-05-26 | 585-571-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | SCOTTSVL | NY |
| 2010-06-02 | 585-571-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SCOTTSVL | 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.