shell:$ nslookup -timeout=2 -retry=1 'm.alpha.facebook.com'
Server: 1.1.1.1
Address: 1.1.1.1#53
Non-authoritative answer:
m.alpha.facebook.com canonical name = latest.c10r.facebook.com.
Name: latest.c10r.facebook.com
Address: 57.144.172.136
Name: latest.c10r.facebook.com
Address: 2a03:2880:f356:88:face:b00c:0:4f5a
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57.144.172.136