PTR

edge-secure-shv-01-det1.facebook.com

A record for

`edge-secure-shv-01-det1.facebook.com`
	A	57.144.172.139
`secure.fallback.c10r.facebook.com`
	A	2a03:2880:f003:c1b:face:b00c:0:2b80
	A	31.13.66.1

work.facebook.com

secure.c10r.facebook.com

50%	2a03:2880:f003:c1b:face:b00c:0:2b80
50%	31.13.66.1

Southfield, Michigan, 🇺🇸 USA

^{🇮🇪 Facebook57.144.172.0/23 , Inc.}