NumberResearchThousands-blocks in 516-266
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 516-266 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 516 blocks
Most active assignees, all time — NPA 516
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 |
|---|---|---|---|---|---|---|---|
| 2017-01-27 | 516-266-0XXX | 0000–0999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN04 | NY |
| 2017-04-11 | 516-266-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | NASSAUZN04 | NY |
| 2017-10-13 | 516-266-2XXX | 2000–2999 | Assigned | ONVOY, LLC- NY | 384C | NASSAUZN04 | NY |
| 2016-09-27 | 516-266-3XXX | 3000–3999 | Assigned | CABLEVISION LIGHTPATH, INC. - NY | 7126 | NASSAUZN04 | NY |
| 2019-03-14 | 516-266-4XXX | 4000–4999 | Assigned | CORETEL NEW YORK, INC. - NY | 1215 | NASSAUZN04 | NY |
| 2016-09-27 | 516-266-5XXX | 5000–5999 | Assigned | CABLEVISION LIGHTPATH, INC. - NY | 7126 | NASSAUZN04 | NY |
| 2017-05-04 | 516-266-6XXX | 6000–6999 | Assigned | ONVOY, LLC- NY | 384C | NASSAUZN04 | NY |
| 2017-05-04 | 516-266-7XXX | 7000–7999 | Assigned | ONVOY, LLC- NY | 384C | NASSAUZN04 | NY |
| 2017-06-15 | 516-266-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN04 | NY |
| 2019-04-29 | 516-266-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - NY | 997E | NASSAUZN04 | 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.