shell:$ nslookup -timeout=2 -retry=1 'portal.movistar.com.pe'
;; Got SERVFAIL reply from 1.1.1.1, trying next server
Server:		8.8.8.8
Address:	8.8.8.8#53

Non-authoritative answer:
Name:	portal.movistar.com.pe
Address: 20.10.219.140