Robtex

Up: 188.187.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 188.187.52.0/23
Down right: 188.187.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
188.187.52.1	PTR	188x187x52x1.dynamic.spb.ertelecom.ru
188.187.52.118	PTR	188x187x52x118.dynamic.spb.ertelecom.ru
188.187.52.120	A	webmail2.cniim.com
188.187.52.223	PTR	dynamicip-188-187-52-223.pppoe.volgograd.ertelecom.ru
188.187.52.227	A+PTR	mail2.dalogistics.ru
188.187.52.240	A+PTR	mail1.lenfin.com
188.187.53.21	A	meteospecpribor.ru
188.187.53.21	A	meteospecpribor.com
188.187.53.40	PTR	dynamicip-188-187-53-40.pppoe.volgograd.ertelecom.ru
188.187.53.47	PTR	dynamicip-188-187-53-47.pppoe.volgograd.ertelecom.ru
188.187.53.51	PTR	188x187x53x51.dynamic.spb.ertelecom.ru
188.187.53.128	PTR	dynamicip-188-187-53-128.pppoe.volgograd.ertelecom.ru
188.187.53.128	A	mx.niipt.ru
188.187.53.130	A	srvcom.niipt.com
188.187.53.130	A	www.niipt.com
188.187.53.131	PTR	dynamicip-188-187-53-131.pppoe.volgograd.ertelecom.ru
188.187.53.131	A	mailsrv.niipt.org
188.187.53.144	PTR	dynamicip-188-187-53-144.pppoe.volgograd.ertelecom.ru
188.187.53.144	A	mail.seafishport.ru
188.187.53.158	PTR	188x187x53x158.dynamic.spb.ertelecom.ru
188.187.53.171	PTR	188x187x53x171.dynamic.spb.ertelecom.ru
188.187.53.234	PTR	dynamicip-188-187-53-234.pppoe.volgograd.ertelecom.ru
188.187.53.237	A	xn--369-qddohl3g.xn--p1ai
188.187.53.237	A	www.xn--369-tddohl3g.xn--p1ai
188.187.53.237	A	www.xn--369-qddohl3g.xn--p1ai
188.187.54.43	PTR	188x187x54x43.dynamic.spb.ertelecom.ru
188.187.54.188	PTR	dynamicip-188-187-54-188.pppoe.volgograd.ertelecom.ru
188.187.54.188	A	mail.zolotoy.ru
188.187.54.220	PTR	188x187x54x220.dynamic.spb.ertelecom.ru
188.187.55.145	PTR	188x187x55x145.dynamic.spb.ertelecom.ru
188.187.55.255	PTR	188x187x55x255.dynamic.spb.ertelecom.ru