Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT
Jurisdiction of Name Under Which Subsidiary Does Entity Organization Business - ------------------------------------------------ ------------------- --------------------------------------- Alaska United Fiber System Partnership Alaska Alaska United Fiber System Partnership, Alaska United Fiber System, Alaska United General Communication, Inc. (the Registrant) Alaska General Communication, Inc., GCI Fiber Hold Co., Inc. Alaska Fiber Hold Co., Inc., Fiber Hold Company GCI Communication Corp. Alaska GCI, GCC, GCICC, GCI Communication Corp. GCI, Inc. Alaska GCI, GCI, Inc. GCI Cable, Inc. Alaska GCI Cable, GCI Cable, Inc. GCI Fiber Co., Inc. Alaska GCI Fiber Co., Inc., GCI Fiber Company GCI Holdings, Inc. Alaska GCI Holdings, Inc. GCI Satellite Co., Inc. Alaska GCI Satellite Co., Inc., GCI Satellite Company GCI Transport Co., Inc. Alaska GCI Transport Co., Inc., GCI Transport Company