NumberResearchThousands-blocks in 518-983
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 518-983 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 518 blocks
Most active assignees, all time — NPA 518
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-12-16 | 518-983-0XXX | 0000–0999 | Assigned | PEERLESS NETWORK OF NEW YORK, LLC - NY | 155E | WILLSBORO | NY |
| 2017-04-14 | 518-983-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | WILLSBORO | NY |
| 2024-07-23 | 518-983-2XXX | 2000–2999 | Assigned | IP HORIZON LLC | 515J | WILLSBORO | NY |
| 2006-12-28 | 518-983-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | WILLSBORO | NY |
| 2023-06-15 | 518-983-4XXX | 4000–4999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | WILLSBORO | NY |
| 2018-08-16 | 518-983-5XXX | 5000–5999 | Assigned | BLUEBIRD COMMUNICATIONS, LLC - NY | 970H | WILLSBORO | NY |
| 2008-04-17 | 518-983-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | WILLSBORO | NY |
| 2021-01-26 | 518-983-7XXX | 7000–7999 | Assigned | PEERING HUB, INC. - NY | 818H | WILLSBORO | NY |
| 2021-03-26 | 518-983-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WILLSBORO | NY |
| 2014-07-07 | 518-983-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | WILLSBORO | 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.