Public regulatory phone
(715) 392-2221
Associations below come from public FCC regulatory records. Confidence describes the source relationship, not current ownership of the number.
| Company or contact | FRN | System | Source record | Confidence | Observed |
|---|---|---|---|---|---|
| KOPPERS INC registrant | 0013147376 | CORES | 0013147376 | Authoritative identifier (100.0%) | 2026-08-17 18:19:59 |
| KOPPERS INC L | 0013147376 | ULS | 09f81c06dc5a5261bd8a6ecbab205d25eedd38dd051cd4a4728269f104eec5dc | Authoritative identifier (100.0%) | 2026-08-17 18:19:29 |