Zone apex
Start of authority
Email
Serial
2026020506
Refresh
4h
Retry
15m
Expire
28d
Negative cache TTL
1h
Question and response
Question
dig ironport.com. SOA
Answer
ironport.com. 3600 SOA ns1-93.akam.net. stbu-hostmaster.cisco.com. 2026020506 14400 900 2419200 3600
Authority
ironport.com. 172800 NS ns1-11.akam.net.
ironport.com. 172800 NS ns1-90.akam.net.
ironport.com. 172800 NS use1.akam.net.
ironport.com. 172800 NS ns1-93.akam.net.
ironport.com. 172800 NS ns1-109.akam.net.
ironport.com. 172800 NS asia3.akam.net.
ironport.com. 172800 NS ns1-117.akam.net.
ironport.com. 172800 NS ns1-73.akam.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0