Zone apex
Start of authority
Email
Serial
2026031203
Refresh
3h
Retry
1h
Expire
30d
Negative cache TTL
3h
Question and response
Question
dig smtp-in.o2.cz. SOA
Answer
The response has no answer records.
Authority
o2.cz. 10800 SOA dns.iol.cz. hostmaster.iol.cz. 2026031203 10800 3600 2592000 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0