NumberResearchThousands-blocks in 518-853
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 518-853 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2015-12-28 | 518-853-0XXX | 0000–0999 | Assigned | INTEGRATED PATH COMMUNICATIONS, LLC - NY | 271G | FONDA | NY |
| — | 518-853-1XXX | 1000–1999 | Reserved | CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY | 0096 | FONDA | NY |
| 2010-10-04 | 518-853-2XXX | 2000–2999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | FONDA | NY |
| — | 518-853-3XXX | 3000–3999 | Reserved | CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY | 0096 | FONDA | NY |
| — | 518-853-4XXX | 4000–4999 | Reserved | CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY | 0096 | FONDA | NY |
| — | 518-853-5XXX | 5000–5999 | Reserved | CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY | 0096 | FONDA | NY |
| 2005-09-23 | 518-853-6XXX | 6000–6999 | Assigned | TWC IP ENABLED SERVICES, LLC | 793K | FONDA | NY |
| 2015-03-13 | 518-853-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | FONDA | NY |
| — | 518-853-8XXX | 8000–8999 | Reserved | CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY | 0096 | FONDA | NY |
| 2016-08-22 | 518-853-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | FONDA | 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.