shell:$ nslookup -timeout=2 -retry=1 'my.ymobile.jp'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
my.ymobile.jp	canonical name = my.ymobile.jp.nwgslb.jp.
Name:	my.ymobile.jp.nwgslb.jp
Address: 210.175.70.3