shell:$ nslookup -timeout=2 -retry=1 'my.ymobile.jp'
Server:		127.0.0.53
Address:	127.0.0.53#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