Robtex

Up: 37.228.104.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 37.228.108.0/23
Down right: 37.228.110.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
37.228.108.1	A+PTR	v0621.dc1.opera.com
37.228.108.4	PTR	a01-07-04.opera-mini.net
37.228.108.5	A	a01-07-05.opera-mini.net
37.228.108.6	PTR	a01-07-06.opera-mini.net
37.228.108.15	PTR	a02-07-04.opera-mini.net
37.228.108.17	PTR	a02-07-06.opera-mini.net
37.228.108.18	A+PTR	a02-07-07.opera-mini.net
37.228.108.68	A	a01-07-03.opera-mini.net
37.228.108.70	PTR	a05-04-05.opera-mini.net
37.228.108.117	A	global-next-lvs-hopper.opera-mini.net
37.228.108.118	A	global-next-lvs-hopper-1.opera-mini.net
37.228.108.121	A	global-next-lvs-hopper-4.opera-mini.net
37.228.108.126	A+PTR	global-turbo-1-lvs-hopper.opera-mini.net
37.228.108.129	PTR	gw-ash-public.opera.com
37.228.108.132	A+PTR	lati.autoupdate.opera.com
37.228.108.132	A	lati01.autoupdate.opera.com
37.228.108.132	A	a26-05-03.lb.opera.technology
37.228.108.133	A+PTR	lati.autoupdate.opera.com
37.228.108.133	A	a29-04-08.lb.opera.technology
37.228.108.134	PTR	lati01.recsys.opera.com
37.228.108.135	PTR	a29-04-08.api.recsys.lb.opera.technology
37.228.108.136	PTR	push.opera.com
37.228.108.136	A	us-push.opera.com
37.228.108.137	PTR	push.opera.com
37.228.108.137	A	us-push.opera.com
37.228.108.140	PTR	a26-05-03.lb.opera.technology
37.228.108.142	A+PTR	a12-01-05.opera.com
37.228.108.142	A	a03-06-05.opera.com
37.228.108.142	A	get.geo.opera.com
37.228.108.143	PTR	a03-05-08.opera.com
37.228.108.143	A	us-redir.opera.com
37.228.108.144	PTR	a04-05-08.opera.com
37.228.108.144	A	us-redir.opera.com
37.228.108.147	A+PTR	redir-www.opera.com
37.228.108.147	A	opera-mini.net
37.228.108.148	A+PTR	redir-www.opera.com
37.228.108.148	A	opera-mini.net
37.228.108.153	PTR	log01.us.ext.opera.com
37.228.108.153	A	a04-05-08-v06.opera.com
37.228.108.154	A+PTR	a04-06-05.opera.com
37.228.108.154	A	get.geo.opera.com
37.228.108.154	A	get.opera.com
37.228.108.158	A	refpage-us-va-lvs.opera-mini.net
37.228.108.171	A+PTR	a24-01-03.opera.com
37.228.108.171	A	autoupdate.geo.opera.com
37.228.108.172	A+PTR	a25-01-03.opera.com
37.228.108.172	A	autoupdate.geo.opera.com
37.228.108.239	A+PTR	net-inst-ash.opera.com
37.228.108.241	PTR	pat-ash2.opera.com
37.228.108.246	A+PTR	redir-www.opera.com
37.228.108.246	A	opera-mini.net
37.228.108.246	A	operamini.com
37.228.108.248	PTR	us.snow.opera.com
37.228.108.248	A	snow.geo.opera.com
37.228.108.248	A	us-fallback.snow.opera.com
37.228.108.250	PTR	sync.opera.com
37.228.108.252	PTR	lb03.us.ext.opera.com
37.228.108.252	A	us.af.opera.com
37.228.108.253	PTR	recsys.opera.com
37.228.108.254	A+PTR	lb01.us.ext.opera.com
37.228.109.127	A+PTR	lo.cr-02.dc1.opera.com
37.228.109.140	A+PTR	a05-05-08-v03.opera-mini.net
37.228.109.141	PTR	geodns-us.op-test.net
37.228.109.141	A	a01-05-08-v04.opera-mini.net
37.228.109.141	A	a06-05-08-v04.opera-mini.net
37.228.109.145	A+PTR	nic2.opera.no
37.228.109.145	A	nic2.opera.com
37.228.109.146	A+PTR	a06-05-08-v10.opera-mini.net
37.228.109.146	A	dev-cust-demo-test.opera-mini.net
37.228.109.150	A+PTR	a02-05-08.opera-mini.net
37.228.109.167	A	a02-05-08-v08.opera-mini.net
37.228.109.253	PTR	epsilon-109-253.opera.com
37.228.110.3	A+PTR	v0628.cr-02.dc1.opera.com
37.228.111.1	PTR	gw-ash.deploy.akamaitechnologies.com
37.228.111.63	PTR	a37-228-111-63.deploy.akamaitechnologies.com
37.228.111.64	PTR	a37-228-111-64.deploy.akamaitechnologies.com
37.228.111.70	PTR	a37-228-111-70.deploy.akamaitechnologies.com
37.228.111.71	A+PTR	a37-228-111-71.deploy.akamaitechnologies.com
37.228.111.76	A+PTR	a37-228-111-76.deploy.akamaitechnologies.com
37.228.111.129	A+PTR	v0629.dc1.opera.com
37.228.111.130	A+PTR	v0629.cr-01.dc1.opera.com
37.228.111.131	A+PTR	v0629.cr-02.dc1.opera.com
37.228.111.136	A+PTR	a13-01-01.opera-mini.net
37.228.111.137	A+PTR	a13-01-02.opera-mini.net
37.228.111.138	A+PTR	a13-01-03.opera-mini.net
37.228.111.139	PTR	a13-01-04.opera-mini.net
37.228.111.144	A+PTR	a13-02-01.opera-mini.net
37.228.111.145	A+PTR	a13-02-02.opera-mini.net
37.228.111.145	A	static.naver.jp.att.ngezz.tk
37.228.111.146	A	a13-02-03.opera-mini.net
37.228.111.153	A+PTR	a13-03-02.opera-mini.net
37.228.111.157	A+PTR	a13-06-02.opera-mini.net
37.228.111.157	A	camera.line.me.157.threeas.from.mrbonus.com
37.228.111.163	PTR	a13-07-02.opera-mini.net
37.228.111.164	A+PTR	a13-07-03.opera-mini.net
37.228.111.165	PTR	a13-07-04.opera-mini.net
37.228.111.170	A	a13-08-01.opera-mini.net
37.228.111.171	A+PTR	a13-08-02.opera-mini.net
37.228.111.171	A	instant.indosat.com.publicvm.com
37.228.111.171	A	internet.indosat.com.publicvm.com
37.228.111.172	A	a13-08-03.opera-mini.net
37.228.111.189	A+PTR	a13-08-07.opera-mini.net
37.228.111.189	A	test-att-test.opera-mini.net
37.228.111.190	PTR	att-us-cust.opera-mini.net
37.228.111.190	A	com.att.ngezz-opera.tk
37.228.111.190	A	id.annaimoetz.co.vu
37.228.111.243	PTR	epsilon-111-243.opera.com