1. Constituted 13 January 1941 in the Regular Army as the 3rd Signal Repair Company
2. Redesignated 28 May 1941 as the 177th Signal Repair Company
3. Activated 1 June 1941 at Camp Claiborne, Louisiana
4. Inactivated 25 June 1946 in Germany
5. Redesignated 29 December 1948 as the 581st Signal Radio Relay Company
6. Activated 25 January 1949 at Camp Gordon, Georgia
7. Inactivated 12 March 1953 in Korea
8. Redesignated 13 July 1954 as the 581st Signal Company and activated at Fort Huachuca, Arizona
9. Inactivated 1 May 1957 at Fort Huachuca, Arizona
10. Activated 15 November 1957 in Germany
11. Inactivated 25 June 1958 in Germany
12. Activated 15 March 1960 in Korea
13. Inactivated 15 December 1962 in Korea
14. Activated 25 June 1964 at Fort McPherson, Georgia
15. Inactivated 15 September 1964 at Fort McPherson, Georgia
16. Activated 25 April 1965 in Vietnam
17. Inactivated 1 August 1966 in Vietnam
18. Activated 4 May 1973 in Germany
19. Inactivated 13 September 1993 in Germany
20. Activated 2006 at Camp Arifjan, Kuwait under the 54th Signal Battalion