Host Analysis:

IP address 72.52.4.121 is located within an IP block ranging from 72.52.4.0 to 72.52.63.255 with CIDR 72.52.4.0/19 and netmask 255.255.196.0. According to a DNS lookup, the host name attributable to this IP is unknown.prolexic.com. Other information about this IP block suggests that users of 72.52.4.121 are in the vicinity of Hollywood, FL, USA, located at 26.0112° latitude, -80.14949° longitude (indicated on the map to the right), and are users of an ISP called Prolexic Technologies, Inc.. The ZIP code from this locale is 33019, and the time zone is America/New York.

We have further analyzed this IP address and found that several domains name are currently mapped to it, such as 0003.biz, 0006.biz, 0123.biz, 013.biz, and 0858.biz. This suggests that the IP address is being used by a server (rather than an end user) to vend web pages or other on-line content.