Service Areas Harrisonville Telephone Company has been a provider of telephone services for over 120 years. HTC continues to provide this valuable service to customers and is also the hometown provider of television and high-speed Internet in the area. In addition to providing comprehensive telecom services, HTC is also the premier Internet service provider of Internet services (ISP) in the area, including high speed Internet in rural areas. HTC serves residential and business customers alike, all with local and friendly customer service. HTC’s long time commitment to provide the most reliable and highest quality service is why it is not only the largest local communications provider but also one of the largest in the country. Although we are the most recognized Internet Service Provider (ISP) in the area, we cannot and will not rest on our past accomplishments. As such, we remain committed to providing the highest quality service at the best price with the best in local support. The counties we proudly service include Monroe, Randolph, and St. Clair.