NumberResearchThousands-blocks in 815-524
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 815-524 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 |
|---|---|---|---|---|---|---|---|
| 2021-10-20 | 815-524-0XXX | 0000–0999 | Assigned | ONVOY, LLC | 224C | LOCKPORT | IL |
| 2010-08-11 | 815-524-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | LOCKPORT | IL |
| 2010-10-06 | 815-524-2XXX | 2000–2999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | LOCKPORT | IL |
| 2006-08-14 | 815-524-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | LOCKPORT | IL |
| 2006-08-14 | 815-524-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | LOCKPORT | IL |
| 2005-02-08 | 815-524-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | LOCKPORT | IL |
| 2010-10-06 | 815-524-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | LOCKPORT | IL |
| 2006-11-01 | 815-524-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | LOCKPORT | IL |
| 2011-08-02 | 815-524-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - IL | 984E | LOCKPORT | IL |
| — | 815-524-9XXX | 9000–9999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 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.