De Kalb County - Missouri [Back to Main] County Information Population: 11,597 Average Income: $31,654 Area: 424 sq. miles Cities: Amity, Clarksdale, Fairport, Maysville, Osborn, Stewartsville, Union Star, Weatherby Service Providers Company Name and Location(s) Serviced Services Provided and Costs Leavenworth Online [Link] 913 & 816 area codes, call for availability DSL Professional installation available 384kbit/384kbit - $24.95/month 1.5mbit/384kbit - $54.95/month North Missouri Internet Services [Link] Amity, Clarksdale, Fairport, Maysville, Osborn, Stewartsville, Weatherby wireless $99 - $399 depending on location 128kbit - $19.95/month 2.0mbit - $29.95/month Socket [Link] Clarksdale, Maysville, Osborn, Stewartsville DSL contact Socket for speeds and prices