NumberResearchThousands-blocks in 516-612
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 516-612 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
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 516-612-0XXX | 0000–0999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN03 | NY |
| 2009-06-29 | 516-612-1XXX | 1000–1999 | Assigned | RINGSQUARED TELECOM LLC | 892E | NASSAUZN03 | NY |
| 2007-06-04 | 516-612-2XXX | 2000–2999 | Assigned | CSC VOICE, LLC | 612K | NASSAUZN03 | NY |
| 2007-06-04 | 516-612-3XXX | 3000–3999 | Assigned | CSC VOICE, LLC | 612K | NASSAUZN03 | NY |
| 2007-06-27 | 516-612-4XXX | 4000–4999 | Assigned | CSC VOICE, LLC | 612K | NASSAUZN03 | NY |
| 2007-08-10 | 516-612-5XXX | 5000–5999 | Assigned | CABLEVISION LIGHTPATH, INC. - NY | 7126 | NASSAUZN03 | NY |
| — | 516-612-6XXX | 6000–6999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN03 | NY |
| 2007-08-10 | 516-612-7XXX | 7000–7999 | Assigned | CSC VOICE, LLC | 612K | NASSAUZN03 | NY |
| 2007-11-12 | 516-612-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | NASSAUZN03 | NY |
| — | 516-612-9XXX | 9000–9999 | Reserved | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NASSAUZN03 | 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.