Robtex

Up: 31.13.220.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 31.13.221.0/25
Down right: 31.13.221.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.13.221.13	A+PTR	store.emk-33.com
31.13.221.13	A	www.emk-33.com
31.13.221.13	A	mail.store.emk-33.com
31.13.221.14	PTR	31.13.221.14.neterra.net
31.13.221.14	A	www.emk-service.com
31.13.221.14	A	emk-service.com
31.13.221.21	A	geopard.online.bg
31.13.221.44	PTR	31.13.221.44.neterra.net
31.13.221.55	A+PTR	mail.m2mservices.com
31.13.221.56	PTR	31.13.221.56.neterra.net
31.13.221.56	A	www.m2mservices.com
31.13.221.56	A	residencecontrol.com
31.13.221.100	PTR	31.13.221.100.neterra.net
31.13.221.100	A	totev.org
31.13.221.116	A+PTR	mail.sebbg.com
31.13.221.124	PTR	31.13.221.124.neterra.net
31.13.221.165	A	mail.cri-group.eu
31.13.221.170	A+PTR	mail.cri.bg
31.13.221.170	A	mail.innova-services.net
31.13.221.170	A	mail.cri-ro.com
31.13.221.171	PTR	31.13.221.171
31.13.221.171	A	*.innova-services.net
31.13.221.171	A	innova-services.net
31.13.221.172	PTR	31.13.221.172
31.13.221.172	A	mail.epsilonbg.com
31.13.221.172	A	bg.epsilonbg.com
31.13.221.197	PTR	31.13.221.197.neterra.net
31.13.221.197	A	ns2.proznanie.bg
31.13.221.204	PTR	socialplus.bg
31.13.221.204	A	mnogozle.com
31.13.221.206	PTR	31.13.221.206.neterra.net
31.13.221.212	PTR	31.13.221.212.neterra.net
31.13.221.212	A	www.praktiker.bg
31.13.221.212	A	praktiker.bg
31.13.221.214	PTR	31.13.221.214.neterra.net
31.13.221.214	A	www.technopolis.bg
31.13.221.229	PTR	31.13.221.229.neterra.net
31.13.221.229	A	j-point.net
31.13.221.229	A	print24.bg
31.13.221.230	A+PTR	mail.j-point.net
31.13.221.230	A	smtp.j-point.net
31.13.221.231	PTR	31.13.221.231.neterra.net
31.13.221.231	A	print2day.bg
31.13.221.231	A	www.print2day.bg