1. Startec Global Communications
7361 Calhoun Pl Ste 520, Derwood, MD 20855
Coordinate: 39.10859,-77.15141
Phone: (301) 610-4300
2. AT&T
7268 Muncaster Mill Rd, Derwood, MD 20855
Coordinate: 39.14763,-77.14669
Phone: (317) 608-6298
3. Comnet Communications
7564 Standish Pl, Derwood, MD 20855
Coordinate: 39.10837,-77.15569
Phone: (301) 978-7010