shell:$ nslookup -timeout=2 -retry=1 'extcap.m.o2.cz'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
extcap.m.o2.cz	canonical name = twm.o2active.cz.
Name:	twm.o2active.cz
Address: 160.218.160.164