Robtex

Up: 216.105.248.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.105.249.0/25
Down right: 216.105.249.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.105.249.8	A+PTR	eventsvc.thinkorswim.com
216.105.249.11	A	mediaserver.thinkorswim.com
216.105.249.13	PTR	support.thinkorswim.com
216.105.249.13	A	tdahelp.net
216.105.249.15	A	tosmobile.com
216.105.249.15	A	tosmobile.net
216.105.249.17	A	tospipes.com
216.105.249.17	A	www.thinkpipes.com
216.105.249.17	A	thinkpipes.com
216.105.249.20	PTR	*.thinkorswim.hk
216.105.249.20	PTR	*.ameritrade.com.hk
216.105.249.20	PTR	*.tdameritrade.com.hk
216.105.249.21	A+PTR	www.tdameritradeu.com
216.105.249.21	A	tdameritradeu.com
216.105.249.22	PTR	events.thinkorswim.com
216.105.249.22	A	mail.mytrade.com
216.105.249.22	A	www.mytrade.com
216.105.249.23	A	thinkorswim.ca
216.105.249.23	A	thinkorswimcanada.com
216.105.249.24	A	www.thinkorswimchallenge.com
216.105.249.26	A+PTR	tdameritradeasia.com
216.105.249.26	A+PTR	www-ct.tdameritradeasia.com
216.105.249.26	A	tdameritrade.com.sg
216.105.249.28	A+PTR	cluster-mobile-ct.thinkorswim.com
216.105.249.28	A	mobile.thinkorswim.com
216.105.249.29	A	thinkorswim.com.sg
216.105.249.30	PTR	thinkorswim.com.sg
216.105.249.30	PTR	start.tdameritrade.com
216.105.249.30	PTR	www.scottrade.thinkorswim.com
216.105.249.139	PTR	pmmgw01.thinkorswim.com
216.105.249.139	A	demo.thinkorswim.com
216.105.249.139	A	mobile-demo.thinkorswim.com
216.105.249.141	PTR	pmmgw03.thinkorswim.com
216.105.249.141	A	demo.thinkorswim.com
216.105.249.141	A	mobile-demo.thinkorswim.com
216.105.249.142	PTR	pmmgw04.thinkorswim.com
216.105.249.142	A	demo.thinkorswim.com
216.105.249.142	A	mobile-demo.thinkorswim.com
216.105.249.143	PTR	pmmgw05.thinkorswim.com
216.105.249.143	A	demo.thinkorswim.com
216.105.249.143	A	mobile-demo.thinkorswim.com
216.105.249.156	PTR	tlmgw01.thinkorswim.com
216.105.249.156	A	tda.thinkorswim.com
216.105.249.156	A	team.thinkorswim.com
216.105.249.157	A	tda.thinkorswim.com
216.105.249.157	A	team.thinkorswim.com
216.105.249.158	A+PTR	tda.thinkorswim.com
216.105.249.158	A	team.thinkorswim.com
216.105.249.159	PTR	tlmgw04.thinkorswim.com
216.105.249.159	A	tda.thinkorswim.com
216.105.249.159	A	team.thinkorswim.com
216.105.249.160	PTR	pmmgw08.thinkorswim.com
216.105.249.160	A	demo.thinkorswim.com
216.105.249.160	A	mobile-demo.thinkorswim.com
216.105.249.161	PTR	tlmgw05.thinkorswim.com
216.105.249.161	A	tda.thinkorswim.com
216.105.249.161	A	team.thinkorswim.com
216.105.249.162	A	tda.thinkorswim.com
216.105.249.162	A	team.thinkorswim.com
216.105.249.163	PTR	tlmgw07.thinkorswim.com
216.105.249.163	A	tda.thinkorswim.com
216.105.249.163	A	team.thinkorswim.com
216.105.249.164	PTR	tlmgw08.thinkorswim.com
216.105.249.164	A	tda.thinkorswim.com
216.105.249.164	A	team.thinkorswim.com
216.105.249.165	A	tda.thinkorswim.com
216.105.249.165	A	team.thinkorswim.com
216.105.249.168	A	rainbow.thinkorswim.com
216.105.249.169	A	rainbow.thinkorswim.com
216.105.249.170	A	rainbow.thinkorswim.com
216.105.249.171	A	rainbow.thinkorswim.com
216.105.249.176	PTR	tlmgw14.thinkorswim.com
216.105.249.176	A	tda.thinkorswim.com
216.105.249.176	A	team.thinkorswim.com
216.105.249.177	A	tda.thinkorswim.com
216.105.249.177	A	team.thinkorswim.com
216.105.249.178	A	tda.thinkorswim.com
216.105.249.178	A	team.thinkorswim.com
216.105.249.183	A	tda.thinkorswim.com
216.105.249.183	A	team.thinkorswim.com
216.105.249.184	A	tda.thinkorswim.com
216.105.249.184	A	team.thinkorswim.com
216.105.249.191	A+PTR	mobile-demo.thinkorswim.com
216.105.249.191	A	demo.thinkorswim.com
216.105.249.191	A	demo-clientmux4.thinkorswim.com
216.105.249.200	A+PTR	update-demo.thinkorswim.com
216.105.249.201	A	update-demo.thinkorswim.com
216.105.249.202	A	update-demo.thinkorswim.com
216.105.249.203	A	update-demo.thinkorswim.com
216.105.249.204	PTR	tljas30.thinkorswim.com
216.105.249.206	PTR	tljas29.thinkorswim.com
216.105.249.206	PTR	tda.thinkorswim.com
216.105.249.206	PTR	team.thinkorswim.com
216.105.249.207	PTR	tljas35.thinkorswim.com
216.105.249.209	PTR	tljas27.thinkorswim.com
216.105.249.210	PTR	pmmgw10.thinkorswim.com
216.105.249.210	A+PTR	demo-clientmux2.thinkorswim.com
216.105.249.210	A+PTR	demo-clientmux4.thinkorswim.com
216.105.249.211	PTR	tljas36.thinkorswim.com
216.105.249.212	PTR	tljas33.thinkorswim.com
216.105.249.213	PTR	pmmgw09.thinkorswim.com
216.105.249.213	A	demo.thinkorswim.com
216.105.249.213	A	mobile-demo.thinkorswim.com
216.105.249.214	PTR	tljas32.thinkorswim.com
216.105.249.218	PTR	tljas26.thinkorswim.com
216.105.249.219	PTR	tljas28.thinkorswim.com
216.105.249.220	PTR	tljas31.thinkorswim.com
216.105.249.221	PTR	tljas34.thinkorswim.com
216.105.249.227	A	update-team.thinkorswim.com
216.105.249.228	A	update-team.thinkorswim.com
216.105.249.229	PTR	mobile-demo.thinkorswim.com
216.105.249.229	A	streamer.thinkorswim.com
216.105.249.234	A	update-team.thinkorswim.com
216.105.249.235	A	update-team.thinkorswim.com
216.105.249.236	A	update-team.thinkorswim.com
216.105.249.237	A	update-team.thinkorswim.com
216.105.249.238	A	update-team.thinkorswim.com
216.105.249.239	A	update-team.thinkorswim.com
216.105.249.240	A	update-team.thinkorswim.com
216.105.249.241	A	update-team.thinkorswim.com
216.105.249.242	A	update-team.thinkorswim.com
216.105.249.243	A	update-team.thinkorswim.com
216.105.249.244	A	update-team.thinkorswim.com
216.105.249.252	A	update-team.thinkorswim.com
216.105.249.253	A	update-team.thinkorswim.com