- Agent for service of process
- Gary Grinham, CSC Global, 1156 15th St. NW, Suite 605, Washington, DC, 20005
- Agent phone / fax
- (800) 927-9801
- Headquarters
- 12920 SW 38th Street, Bellevue, WA, 98006
- Customer inquiries
- (213) 372-7777
- Holding company
- T-Mobile USA, Inc.
- States served (54)
- Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia, Florida, Georgia, Guam, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, US Virgin Islands, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
- FCC 499 Filer ID
- 833246
- Last filing
- 4/1/2026