EXHIBIT 21 SUBSIDIARIES OF REGISTRANTS IDACORP, Inc: 1. Idaho Power Company, an Idaho Corporation 2. Ida-West Energy Company, an Idaho Corporation 3. IDACORP Services Company, a Nevada Corporation, doing business as Idaho Power Services Company and IDACORP Solutions 4. Allied Utility Network, LLC., a Delaware Limited Liability company 5. IDACORP Energy Services Company, a Nevada Corporation 6. IDACORP Energy Solutions L.P., A Delaware Limited Partnership 7. IDACORP Technologies, Inc., an Idaho Corporation 8. IDATECH, LLC, an Oregon Limited Liability Company 9. Idaho Solar Power, LLC., a Washington Limited Liability Company 10. Applied Power Corporation, a Washington Corporation* 11. IDACORP Financial Services, Inc., an Idaho Corporation 12. IDACOMM, Inc., an Idaho Corporation 13. RMC, Inc., an Idaho Corporation Idaho Power Company 1. Idaho Energy Resources Company, a Wyoming Corporation 2. Idaho Power Resources Corporation, an Idaho Corporation 3. Pathnet/Idaho Power Equipment, LLC., a Delaware Limited Liability Company *Note: On January 1, 2001 this subsidiary was sold.