mx: mail-a.linkedin.com.
mx: mail-c.linkedin.com.
mx: mail-d.linkedin.com.
mx: mail.linkedin.com.
ns: dns1.p09.nsone.net.
ns: dns2.p09.nsone.net.
ns: dns3.p09.nsone.net.
ns: dns4.p09.nsone.net.
ns: ns1-42.azure-dns.com.
ns: ns2-42.azure-dns.net.
ns: ns3-42.azure-dns.org.
ns: ns4-42.azure-dns.info.