Public regulatory phone
(630) 493-6100
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 |
|---|---|---|---|---|---|
| T-Systems North America, Inc. customer_inquiries | 0004375333 | FORM499 | 820820 | Authoritative identifier (100.0%) | 2026-08-01 03:48:06 |
| T-Systems North America, Inc. licensee_phone | 0011533692 | ICFS | ITC-ASG-20200713-00114:529456 | High confidence (95.0%) | 2026-08-01 22:18:13 |