192.168.100.1 is one of the popular router login IP address, just like 192.168.1.1 (also written as 192.168.l.l),  192.168.0.1, 192.168.l.254 and 192.168.l.2. IP Address 192.168.100.1 is majorly used in countries like Indonesia, Brazil, United States, Mexico, Saudi Arabia, Belarus, Finland, Russian Federation, Kazakhstan, Columbia, Mauritius...