NumberResearchThousands-blocks in 585-673
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 585-673 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 |
|---|---|---|---|---|---|---|---|
| 2015-03-18 | 585-673-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | EROCHESTER | NY |
| 2015-03-18 | 585-673-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | EROCHESTER | NY |
| 2015-04-07 | 585-673-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EROCHESTER | NY |
| 2016-06-06 | 585-673-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EROCHESTER | NY |
| 2017-03-15 | 585-673-4XXX | 4000–4999 | Assigned | TELNYX LLC | 073H | EROCHESTER | NY |
| 2016-12-16 | 585-673-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | EROCHESTER | NY |
| 2016-12-16 | 585-673-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | EROCHESTER | NY |
| 2018-07-11 | 585-673-7XXX | 7000–7999 | Assigned | ONVOY, LLC- NY | 384C | EROCHESTER | NY |
| 2018-02-02 | 585-673-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EROCHESTER | NY |
| 2019-04-11 | 585-673-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | EROCHESTER | 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.