Who Owns The Number ?
Toll Free (8xx) Numbers
Call the Ameritech service at 800-337-4194. This service provides the "resporg ID" and the associated customer service number of the responsible organization.
Some Popular Resporg ID's
| Carrier | Resporg ID |
| Level 3 | LVC01 |
| Cavalier Telephone | HER01 |
| ATT | ATXxx |
| Sprint | SPBxx |
| PAETEC | PKC03 |
| MCI | MCIxx, WILxx |
Non 800 numbers? Click here.