NumberResearchThousands-blocks in 815-660
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 815-660 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 815 blocks
Most active assignees, all time — NPA 815
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-02-12 | 815-660-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | LOCKPORT | IL |
| 2013-04-09 | 815-660-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | LOCKPORT | IL |
| 2016-02-12 | 815-660-2XXX | 2000–2999 | Assigned | ONVOY, LLC | 224C | LOCKPORT | IL |
| — | 815-660-3XXX | 3000–3999 | Reserved | RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | 8702 | LOCKPORT | IL |
| — | 815-660-4XXX | 4000–4999 | Available | LOCKPORT | IL | ||
| 2017-04-26 | 815-660-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | LOCKPORT | IL |
| 2017-07-05 | 815-660-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | LOCKPORT | IL |
| 2016-11-15 | 815-660-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | LOCKPORT | IL |
| 2016-07-11 | 815-660-8XXX | 8000–8999 | Assigned | IP HORIZON LLC | 515J | LOCKPORT | IL |
| 2024-01-10 | 815-660-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LOCKPORT | IL |
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.