NumberResearchThousands-blocks in 838-666
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 838-666 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 838 blocks
Most active assignees, all time — NPA 838
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-12-21 | 838-666-0XXX | 0000–0999 | Assigned | PEERING HUB, INC. - NY | 818H | ESPERANCE | NY |
| 2021-01-25 | 838-666-1XXX | 1000–1999 | Assigned | TELNYX LLC | 073H | ESPERANCE | NY |
| — | 838-666-2XXX | 2000–2999 | Available | ESPERANCE | NY | ||
| — | 838-666-3XXX | 3000–3999 | Available | ESPERANCE | NY | ||
| 2026-04-29 | 838-666-4XXX | 4000–4999 | Assigned | EXIANT COMMUNICATIONS LLC | 114J | ESPERANCE | NY |
| — | 838-666-5XXX | 5000–5999 | Available | ESPERANCE | NY | ||
| 2017-09-06 | 838-666-6XXX | 6000–6999 | Assigned | ONVOY, LLC- NY | 384C | ESPERANCE | NY |
| 2021-03-15 | 838-666-7XXX | 7000–7999 | Assigned | ONVOY, LLC- NY | 384C | ESPERANCE | NY |
| — | 838-666-8XXX | 8000–8999 | Available | ESPERANCE | NY | ||
| 2021-09-22 | 838-666-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | ESPERANCE | 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.