NumberResearchThousands-blocks in 518-738
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 518-738 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 |
|---|---|---|---|---|---|---|---|
| — | 518-738-0XXX | 0000–0999 | Reserved | LEVEL 3 TELECOM OF NEW YORK, LP - NY | 8473 | COLONIE | NY |
| 2017-03-02 | 518-738-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | COLONIE | NY |
| 2019-04-24 | 518-738-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | COLONIE | NY |
| 2011-04-26 | 518-738-3XXX | 3000–3999 | Assigned | YMAX COMMUNICATIONS CORP. - NY | 282E | COLONIE | NY |
| 2019-03-25 | 518-738-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | COLONIE | NY |
| 2020-05-13 | 518-738-5XXX | 5000–5999 | Assigned | IP HORIZON LLC | 515J | COLONIE | NY |
| 2024-06-12 | 518-738-6XXX | 6000–6999 | Assigned | ONVOY, LLC- NY | 384C | COLONIE | NY |
| 2018-12-18 | 518-738-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | COLONIE | NY |
| 2015-09-08 | 518-738-8XXX | 8000–8999 | Assigned | LEVEL 3 TELECOM OF NEW YORK, LP - NY | 8473 | COLONIE | NY |
| 2015-09-08 | 518-738-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF NEW YORK, LP - NY | 8473 | COLONIE | 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.