via PC World

PC World published the list of the 100 oldest dot-com domains registered.

This first one was reserved on March 15, 1985 – symbolics.com.

Below the Top20:

1. symbolics.com: March 15, 1985
2. bbn.com: April 24, 1985
3. think.com: May 24, 1985
4. mcc.com: July 11, 1985
5. dec.com: September 30, 1985
6. northrop.com: November 7, 1985
7. xerox.com: January 9, 1986
8. sri.com: January 17, 1986
9. hp.com: March 3, 1986
10. bellcore.com: March 5, 1986
11. ibm.com: March 19, 1986
12. sun.com: March 19, 1986
13. intel.com: March 25, 1986
14. ti.com: March 25, 1986
15. att.com: April 25, 1986
16. gmr.com: May 8, 1986
17. tek.com: May 8, 1986
18. fmc.com: July 10, 1986
19. ub.com: July 10, 1986
20. bell-atl.com: August 5, 1986

Also interesting to notice that Microsoft first reserved its domain in May 1991, Yahoo in January 1995, and Google in September 1997!