NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 585
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-05-10 | 585-537-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2018-05-10 | 585-867-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2018-02-02 | 585-448-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2018-02-02 | 585-673-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EROCHESTER | NY |
| 2018-02-02 | 585-867-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2016-12-27 | 585-448-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2016-12-27 | 585-448-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2016-11-09 | 585-524-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | BATAVIA | NY |
| 2016-10-10 | 585-537-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2016-10-10 | 585-537-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2016-09-30 | 585-488-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | SPENCERPT | NY |
| 2016-08-15 | 585-404-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HENRIETTA | NY |
| 2016-06-06 | 585-673-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EROCHESTER | NY |
| 2016-05-12 | 585-430-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | FAIRPORT | NY |
| 2016-05-12 | 585-685-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2016-05-12 | 585-685-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2016-02-22 | 585-412-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CANANDAGUA | NY |
| 2016-02-01 | 585-626-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | WEBSTER | NY |
| 2015-09-25 | 585-433-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | VICTOR | NY |
| 2015-09-11 | 585-417-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2015-09-11 | 585-417-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2015-09-11 | 585-417-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2015-07-22 | 585-622-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2015-07-22 | 585-623-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2015-07-01 | 585-446-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | W WEBSTER | NY |
| 2015-04-07 | 585-673-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EROCHESTER | NY |
| 2015-04-02 | 585-491-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2015-04-02 | 585-491-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2015-03-09 | 585-364-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | FAIRPORT | NY |
| 2015-02-26 | 585-435-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2015-02-26 | 585-445-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-12-11 | 585-434-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-12-11 | 585-434-4XXX | 4000–4999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-12-11 | 585-434-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-11-24 | 585-444-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | HENRIETTA | NY |
| 2014-10-30 | 585-900-3XXX | 3000–3999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | CHAFFEE | NY |
| 2014-10-21 | 585-434-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-10-21 | 585-434-1XXX | 1000–1999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-10-21 | 585-434-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-09-05 | 585-363-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-09-05 | 585-623-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-06-25 | 585-471-5XXX | 5000–5999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-06-25 | 585-485-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EROCHESTER | NY |
| 2014-05-08 | 585-978-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2014-04-28 | 585-364-0XXX | 0000–0999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | FAIRPORT | NY |
| 2013-11-15 | 585-471-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2013-11-15 | 585-481-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2013-07-24 | 585-310-7XXX | 7000–7999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | EROCHESTER | NY |
| 2013-02-19 | 585-441-9XXX | 9000–9999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | NY |
| 2010-12-21 | 585-270-8XXX | 8000–8999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | ROCHESTER | 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.