wget --quiet -O- https://www.pingdom.com/rss/probe_servers.xml | perl -nle 'print $1 if /IP: (([01]?dd?|2[0-4]d|25[0-5]).([01]?dd?|2[0-4]d|25[0-5]).([01]?dd?|2[0-4]d|25[0-5]).([01]?dd?|2[0-4]d|25[0-5]));/'
wget --quiet -O- https://www.pingdom.com/rss/probe_servers.xml | perl -nle 'print $1 if /IP: (([01]?dd?|2[0-4]d|25[0-5]).([01]?dd?|2[0-4]d|25[0-5]).([01]?dd?|2[0-4]d|25[0-5]).([01]?dd?|2[0-4]d|25[0-5]));/'