About 15 minutes ago with me not doing anything my printer printed something from ipv4scan.com. This has never happened before in all my years of computer use (freaked me out). Who and what is ipv4scan.com? below is what was printed,

Get http://ipv4scan.com/hello/check.txt HTTP/1.1
Host: ipv4scan.com
Accept-Encoding: gzip, deflate, compress
Accept: */*
User-Agent: IPv4Scan (+IPv4 Scan: Scanning the Web for Open Proxy Servers)