Public regulatory phone
(847) 484-4400
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 |
|---|---|---|---|---|---|
| Master Lock Company LLC Senior Compliance Engineer | 0021474101 | CORES | 0021474101 | Authoritative identifier (100.0%) | 2026-08-24 17:27:27 |