Zone apex
Start of authority
Email
Serial
1
Refresh
1h
Retry
5m
Expire
7d
Negative cache TTL
1m
Question and response
Question
dig mail-a.linkedin.com. SOA
Answer
The response has no answer records.
Authority
linkedin.com. 60 SOA ns1-42.azure-dns.com. hostmaster.linkedin.com. 1 3600 300 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0