NumberResearchThousands-blocks in 518-754
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 518-754 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 |
|---|---|---|---|---|---|---|---|
| 2012-12-17 | 518-754-0XXX | 0000–0999 | Assigned | ONVOY, LLC- NY | 384C | CASTLETON | NY |
| — | 518-754-1XXX | 1000–1999 | Reserved | PAETEC ITEL, LLC | 829J | CASTLETON | NY |
| 2006-08-07 | 518-754-2XXX | 2000–2999 | Assigned | RINGSQUARED TELECOM LLC | 8249 | CASTLETON | NY |
| 2005-12-08 | 518-754-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | CASTLETON | NY |
| 2004-06-17 | 518-754-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | CASTLETON | NY |
| 2014-07-07 | 518-754-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | CASTLETON | NY |
| — | 518-754-6XXX | 6000–6999 | Reserved | PAETEC ITEL, LLC | 829J | CASTLETON | NY |
| — | 518-754-7XXX | 7000–7999 | Reserved | PAETEC ITEL, LLC | 829J | CASTLETON | NY |
| 2016-08-22 | 518-754-8XXX | 8000–8999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | CASTLETON | NY |
| 2018-08-16 | 518-754-9XXX | 9000–9999 | Assigned | BLUEBIRD COMMUNICATIONS, LLC - NY | 970H | CASTLETON | 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.