Host Analysis for 121.83.204.173:
IP address 121.83.204.173 is located within an IP block ranging from 121.83.204.0 to 121.83.206.255 with CIDR 121.83.204.0/23 and netmask 255.255.253.0. According to a DNS lookup, the host name attributable to this IP is newservers.sendmail.ne.jp. Other information about this IP block suggests that users of 121.83.204.173 are in the vicinity of Amagasaki, Hyogo, JP, located at 34.733° latitude, 135.400° longitude (indicated on the map to the right), and are users of an ISP called Optage Optage Inc.. The ZIP code from this locale is 660-0808, and the time zone is Asia/Tokyo.
We have further analyzed this IP address and found that several domain names are currently mapped to it, such as kodama-shika.com, saitou-piano.com, sasaki-hyogu.com, studio-kurumi.com, and nakayoshi-2001.com, among others. This suggests that the IP address is being used by a public server (rather than an end user or a private server) to serve web pages or other app content.