Before i register the domain name, someone advice me to register with .com extension. So everyone are familiar with dot-com (.com) domain name on the internet. This is because the .com domain name is the most common domain name found on the internet and it is the largest TLD (top level domain name) in use.

The .com domain name was first established in January 1985, and currently operated by Verisign.

Here The parts of the list :

Rank      Create date      Domain name
1.      15-Mar-1985    SYMBOLICS.COM
2.      24-Apr-1985    BBN.COM
3.      24-May-1985    THINK.COM
4.      11-Jul-1985    MCC.COM
5.      30-Sep-1985    DEC.COM
6.      07-Nov-1985    NORTHROP.COM
7.      09-Jan-1986    XEROX.COM
8.      17-Jan-1986    SRI.COM
9.      03-Mar-1986    HP.COM
10.      05-Mar-1986    BELLCORE.COM

seen like the oldest dot-com domain registered by Symbolics, Inc,

read the rest here: The 100 oldest currently registered .COM domains

Via mypapit