go
sparrow-smtp.pinboard.com point to 69.64.33.247.

sparrow-smtp.pinboard.com
cname records
sparrow-247.pinboard.com
+ 69.64.33.247 69.64.32.0/19 AS30083 -
+ --- -

sparrow-247.pinboard.com
ptr records
 
+ 69.64.33.247 69.64.32.0/19 AS30083 -
+ --- -
ip numbers of host
69.64.33.247
ptrs of ip numbers
sparrow-247.pinboard.com
hostnames sharing ip with a-records
sparrow-smtp.pinboard.com
domains using this as mailserver
falk.pinboard.com
teufen.pinboard.com