| CANYONLAND CELLULAR OF UTAH LIMITED PARTNERSHIPLocation not reported, CO · Voluntarily Dissolved | Location not reported, CO | Partnership | Jan 20, 1989 | Voluntarily Dissolved |
| CABLE SHOPPING INVESTMENT, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | May 16, 1989 | Merged |
| UNITED CABLE VIDEO INVESTMENT, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | May 16, 1989 | Merged |
| AMERICAN MOVIE CLASSICS INVESTMENT, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | May 16, 1989 | Merged |
| DISCOVERY PROGRAMMING INVESTMENT, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | May 16, 1989 | Merged |
| IOWA 8 - MONONA LIMITED PARTNERSHIPLocation not reported, CO · Exists | Location not reported, CO | Partnership | Aug 23, 1989 | Exists |
| NORTH DAKOTA 5 - KIDDER LIMITED PARTNERSHIPLocation not reported, CO · Exists | Location not reported, CO | Partnership | Aug 23, 1989 | Exists |
| COLORADO 4 - PARK LIMITED PARTNERSHIPLocation not reported, CO · Voluntarily Dissolved | Location not reported, CO | Partnership | Aug 23, 1989 | Voluntarily Dissolved |
| UNITED ARTISTS K-1 INVESTMENTS, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Jan 16, 1990 | Merged |
| AT&T CAPITAL HOLDINGS, INC.Location not reported, CO · Good Standing | Location not reported, CO | Other | Apr 19, 1990 | Good Standing |
| UNITED ARTISTS SATELLITE, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Jan 8, 1991 | Merged |
| DIGITAL DIRECT, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Feb 6, 1991 | Merged |
| UNITED ARTISTS PREFERRED INVESTMENTS, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Mar 27, 1991 | Merged |
| TCI TELEPORT, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Feb 13, 1992 | Good Standing |
| TCG PARTNERS HOLDINGS I, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Dec 10, 1992 | Merged |
| AMERICAN TELEPHONE AND TELEGRAPH COMPANY, Colorado Authority Relinquished May 11, 2010Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Dec 17, 1993 | Withdrawn |
| AT&T FINANCIAL SERVICES INC., Colorado Authority Relinquished February 4, 2008Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Dec 17, 1993 | Withdrawn |
| AT&T FINANCE CORP., Colorado Authority Relinquished February 4, 2008Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Dec 17, 1993 | Withdrawn |
| COMMNET PAGING INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Mar 7, 1995 | Merged |
| NUI TELECOM, INC., Colorado Authority Terminated August 11, 2003Location not reported, CO · Revoked | Location not reported, CO | Corporation | Feb 21, 1996 | Revoked |
| AT&T CREDIT HOLDINGS, INC.Location not reported, CO · Good Standing | Location not reported, CO | Other | May 29, 1996 | Good Standing |
| GOLD CREEK CELLULAR OF MONTANA LIMITED PARTNERSHIPLocation not reported, CO · Exists | Location not reported, CO | Partnership | Jun 27, 1996 | Exists |
| AT&T PROFESSIONAL SERVICES CORP., Colorado Authority Relinquished February 25, 2008Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Jul 2, 1996 | Withdrawn |
| TCG AMERICA, INC., Colorado Authority Relinquished January 29, 2013Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Oct 23, 1996 | Withdrawn |
| TCI TELEPORT HOLDINGS, INC.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Dec 31, 1996 | Good Standing |
| TCI LL, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Jul 10, 1997 | Merged |
| TCI NJFT, INC.Location not reported, CO · Merged | Location not reported, CO | Corporation | Jul 10, 1997 | Merged |
| AT&T NETWORK SERVICES LLC, Colorado Authority Relinquished June 8, 2011Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Jan 15, 1998 | Withdrawn |
| AT&T NETWORK PROCUREMENT LP, Colorado Authority Relinquished July 29, 2015Location not reported, CO · Withdrawn | Location not reported, CO | Partnership | Jan 20, 1999 | Withdrawn |
| The Italian ConciergeLocation not reported, CO · Converted | Location not reported, CO | Corporation | Jul 9, 1999 | Converted |
| AT&T GLOBAL NETWORK SERVICES LLC, Colorado Authority Relinquished February 5, 2015Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Sep 27, 1999 | Withdrawn |
| AT&T CAPITAL HOLDINGS INTERNATIONAL, INC., Colorado Authority Relinquished December 27, 2022Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Jul 5, 2000 | Withdrawn |
| KMC TELECOM V, INC., Colorado Authority Relinquished February 7, 2006Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Dec 4, 2000 | Withdrawn |
| CORTECH, INC., Colorado Authority Relinquished August 20, 2007Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Mar 16, 2001 | Withdrawn |
| ACC NATIONAL LONG DISTANCE CORP., Colorado Authority Relinquished September 17, 2012Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Jun 4, 2001 | Withdrawn |
| KMC TELECOM VIII, LLC, Colorado Authority Relinquished December 21, 2005Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Aug 14, 2001 | Withdrawn |
| KMC FUNDING VIII, LLC, Colorado Authority Relinquished December 27, 2005Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Aug 14, 2001 | Withdrawn |
| AMBASSADOR TRANSLATING INC., Colorado Authority Relinquished June 28, 2013Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Jul 29, 2002 | Withdrawn |
| GLOBAL CARD HOLDINGS, INC., Colorado Authority Terminated August 29, 2005Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Aug 15, 2002 | Withdrawn |
| TCG CERFNET, INC., Colorado Authority Relinquished January 29, 2013Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Aug 26, 2002 | Withdrawn |
| TELEPORT COMMUNICATIONS GROUP INC., Colorado Authority Relinquished August 13, 2015Location not reported, CO · Withdrawn | Location not reported, CO | Corporation | Aug 26, 2002 | Withdrawn |
| KMC TELECOM XI LLC, Colorado Authority Relinquished February 7, 2006Location not reported, CO · Withdrawn | Location not reported, CO | LLC | Jan 8, 2003 | Withdrawn |
| Alldigi Tech Inc.Location not reported, CO · Good Standing | Location not reported, CO | Corporation | Mar 2, 2004 | Good Standing |
| AT&T CREDIT INVESTMENTS 1, INC., Colorado Authority Relinquished May 8, 2019Location not reported, CO · Withdrawn | Location not reported, CO | Other | Apr 3, 2007 | Withdrawn |
| Teleport Communications America, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Jun 7, 2012 | Good Standing |
| DDI Leasing, Inc.Location not reported, CO · Delinquent | Location not reported, CO | Corporation | Oct 22, 2012 | Delinquent |
| Stickel Investments, L.L.C., Delinquent November 1, 2015Location not reported, CO · Delinquent | Location not reported, CO | LLC | Jun 6, 2013 | Delinquent |
| Stickel Properties, L.L.C., Delinquent December 1, 2015Location not reported, CO · Delinquent | Location not reported, CO | LLC | Jul 26, 2013 | Delinquent |
| AT&T Network Supply, LLCLocation not reported, CO · Good Standing | Location not reported, CO | LLC | Feb 5, 2014 | Good Standing |
| Macrosoft, IncLocation not reported, CO · Good Standing | Location not reported, CO | Corporation | Feb 18, 2014 | Good Standing |