<PAGE>
Exhibit 21
TELECORP ENTITIES
-----------------
Address for all entities: 1010 N. Glebe Road, Arlington, VA 22201
<TABLE>
<CAPTION>
=======================================================================================
TeleCorp Entity Date of State of
Incorporation Incorporation
---------------------------------------------------------------------------------------
<S> <C> <C>
1. TeleCorp Holding Corp., Inc. 7/29/96 DE
---------------------------------------------------------------------------------------
2. TeleCorp LMDS, Inc. 11/5/97 DE
---------------------------------------------------------------------------------------
TeleCorp PCS, L.L.C. (NEW) 7/14/98 DE
(Sole Member is: TeleCorp PCS, Inc.)
---------------------------------------------------------------------------------------
3. TeleCorp Puerto Rico Realty, Inc. f/k/a/ 5/27/98 PR
Puerto Rico Acquisition Corp. (formerly DE)
=======================================================================================
</TABLE>
<PAGE>
<TABLE>
<S> <C> <C>
=======================================================================================
4. TeleCorp Communications, Inc. 6/19/98 DE
(f/k/a TeleCorp Operating Company, Inc.)
---------------------------------------------------------------------------------------
5. TeleCorp Realty, L.L.C. 7/9/98 DE
(Managing Member is: TeleCorp
Communications, Inc.)
---------------------------------------------------------------------------------------
6. TeleCorp Equipment Leasing, L.P. 7/9/98 DE
(General Partner is: TeleCorp Limited
Holdings, Inc.)
---------------------------------------------------------------------------------------
7. TeleCorp Limited Holdings, Inc. 7/9/98 DE
---------------------------------------------------------------------------------------
8. TeleCorp Realty Holdings, Inc. 7/9/98 DE
---------------------------------------------------------------------------------------
9. Affiliate License Co., L.L.C. 10/9/98 DE
---------------------------------------------------------------------------------------
10. TeleCorp of Puerto Rico, Inc. 2/24/99 Puerto Rico
=======================================================================================
</TABLE>
<PAGE>
<TABLE>
<S> <C> <C>
==========================================================================================
11. RW Acquisition, L.L.C. 12/22/99 DE
------------------------------------------------------------------------------------------
12. Zephyr Wireless, L.L.C. 3/8/00 DE
------------------------------------------------------------------------------------------
13. TeleCorp-Tritel Holding Company 4/27/00 DE
------------------------------------------------------------------------------------------
14. TeleCorp Acquisition Sub., L.L.C. DE
==========================================================================================
</TABLE>
Bold = To be withdrawn
