shell:$ nslookup -timeout=2 -retry=1 'h.facebook.com'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
h.facebook.com	canonical name = headers-regional.vvv.facebook.com.
Name:	headers-regional.vvv.facebook.com
Address: 66.220.149.254
Name:	headers-regional.vvv.facebook.com
Address: 2a03:2880:21ff:fffe:face:b00c:0:1