NumberResearchThousands-blocks in 516-409
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 516-409 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 516-409-0XXX | 0000–0999 | Reserved | VERIZON NEW YORK, INC. | 9104 | NASSAUZN09 | NY |
| — | 516-409-1XXX | 1000–1999 | Reserved | VERIZON NEW YORK, INC. | 9104 | NASSAUZN09 | NY |
| — | 516-409-2XXX | 2000–2999 | Reserved | VERIZON NEW YORK, INC. | 9104 | NASSAUZN09 | NY |
| 2002-03-11 | 516-409-3XXX | 3000–3999 | Assigned | TC SYSTEMS, INC. - NY | 7140 | NASSAUZN09 | NY |
| — | 516-409-4XXX | 4000–4999 | Reserved | VERIZON NEW YORK, INC. | 9104 | NASSAUZN09 | NY |
| — | 516-409-5XXX | 5000–5999 | Reserved | VERIZON NEW YORK, INC. | 9104 | NASSAUZN09 | NY |
| — | 516-409-6XXX | 6000–6999 | Reserved | VERIZON NEW YORK, INC. | 9104 | NASSAUZN09 | NY |
| 2010-12-21 | 516-409-7XXX | 7000–7999 | Assigned | IP HORIZON LLC | 515J | NASSAUZN09 | NY |
| — | 516-409-8XXX | 8000–8999 | Reserved | VERIZON NEW YORK, INC. | 9104 | NASSAUZN09 | NY |
| — | 516-409-9XXX | 9000–9999 | Reserved | VERIZON NEW YORK, INC. | 9104 | NASSAUZN09 | NY |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.