Dennis R. Kilburg

Iowa Telecommunications Services, Inc. provides wireline local exchange telecommunications services. It offers network access services to the interexchange carriers for the origination & termination of interstate and intrastate long distance phone calls on its network. The company was founded in 1999 and is headquartered in Newton, IA.

Iowa Network Services, Inc. provides telecommunications, networking, and internet solutions. The firm offers technology, human resources, talent acquisition, contact center, and consulting services. The company was founded in 1989 and is headquartered in West Des Moines, IA.

Part of Verizon Communications, Inc., GTE Midwest, Inc. provides local, long distance and other related telecommunications services. The company is based in Irving, TX.

Part of Verizon Communications, Inc., ConTel Corp. is a telecommunications company. The company is based in Atlanta, GA. ConTel was acquired by GTE Corp. on March 15, 1991 for $6,421.20 million.

Enventis Corporation provides integrated communications services to business and residential customers. It offers local phone, long distance, high-speed Internet, digital TV, advanced business and IP networking services. The company was founded in 1898 and is headquartered in Mankato, MN.

Preston Telephone Co. provides telecommunication services. The private company is based in Preston, IA.