EXHIBIT NO. 21 21. SUBSIDIARIES (all wholly-owned, except where otherwise indicated) State of Name Incorporation Citizen Solutions Company Arizona Citizens Business Services Company Illinois Citizens Cable Company Delaware Subsidiary of Citizens Cable Company NCC Systems, Inc. Texas Citizens Capital Ventures Company Delaware Citizens Consumers Services, Inc. California Citizens Directory Services Company L.L.C. Delaware Citizens Directory Services Company, Inc. Delaware Citizens International Management Services Company Delaware Citizens Lake Water Company Illinois Citizens Mohave Cellular Company Delaware Citizens Mountain State Telephone Company West Virginia Citizens NEWCOM Company Delaware Citizens NEWTEL Company Delaware Citizens Public Works Service Company of Arizona Minnesota Citizens Resources Company Delaware Citizens Telecom Services Company L.L.C. Delaware Citizens Telecommunications Company Delaware Citizens Telecommunications Company of California, Inc. California Citizens Telecommunications Company of Colorado Delaware Citizens Telecommunications Company of Idaho Delaware Citizens Telecommunications Company of Iowa Delaware Citizens Telecommunications Company of Minnesota, Inc. Delaware Citizens Telecommunications Company of Montana Delaware Citizens Telecommunications Company of Nebraska Delaware Citizens Telecommunications Company of Nevada Nevada Citizens Telecommunications Company of New York, Inc. New York Citizens Telecommunications Company of North Dakota Delaware Citizens Telecommunications Company of Oregon Delaware Citizens Telecommunications Company of Tennessee L.L.C. Delaware Citizens Telecommunications Company of the Golden State California Citizens Telecommunications Company of the Volunteer State L.L.C. Delaware Citizens Telecommunications Company of the White Mountains, Inc. Delaware Citizens Telecommunications Company of Tuolumne California Citizens Telecommunications Company of Utah Delaware Citizens Telecommunications Company of West Virginia Delaware Citizens Telecommunications Company of Wyoming Delaware Citizens Utilities Company of California California Citizens Utilities Company of Illinois Illinois Citizens Utilities Company of Ohio Ohio Citizens Utilities Rural Company, Inc. Delaware Citizens Utilities Water Company of Pennsylvania Pennsylvania Citizens Water Resources Company of Arizona Arizona Citizens Water Resources Company Delaware Citizens Water Resources Management Services Company Delaware Citizens Water Services Company of Arizona Arizona Conference-Call USA, Inc. Delaware Subsidiary of Conference-Call USA, Inc.: Dial Services, Ltd., Inc. Delaware CU CapitalCorp Delaware Subsidiary of CU CapitalCorp: Electric Lightwave, Inc. * Delaware CU Wireless Management L.L.C. Delaware Flowing Wells, Inc. Indiana Havasu Water Company, Inc. Arizona LGS Natural Gas Company Louisiana Navajo Communications Company, Inc. New Mexico Ogden Telephone Company New York Subsidiaries of Ogden Telephone Company: NewOp Communications Corporation New York Phone Trends, Inc. New York Rhinelander Telecommunications, Inc. Wisconsin Subsidiary of Rhinelander Telecommunications, Inc. Crandon Telephone Company Wisconsin Headwaters Telephone Company Wisconsin New North Telecommunications, Inc. Wisconsin Rhinelander Telephone Company Wisconsin Rib Lake Telephone Company Wisconsin Subsidiary of Rib Lake Telephone Company Rib Lake Cellular for Wisconsin RSA #3 Wisconsin Rib Lake Telecom, Inc. Wisconsin Southwestern Capital Corporation Delaware Southwestern Investments, Inc. Nevada Sun City Sewer Company Arizona Sun City Water Company Arizona Sun City West Utilities Company Arizona Tubac Valley Water Company, Inc. Arizona * Economic interest 82.11%, voting interest 97.87%.