MX records not consistent
Authoritative servers are returning different records.
- This likely indicates a DNS server configuration issue.
- Records may not have propagated among authoritative servers yet.
DNS server
TTL
Time To Live
The amount of time a DNS record is cached for.
Records returned by these servers
The official source of information for this domain,
managed by the owner of cas.cz .
managed by the owner of cas.cz .
visla.utia.cas.cz
147.231.12.1
South Africa
105.243.178.242
Australia
123.100.147.201
United States of America
162.243.12.37
India
172.232.76.111
Ukraine
193.150.122.140
Brazil
200.231.34.18
Netherlands
85.222.251.238
Russia
94.45.223.82
94.140.14.14
185.228.169.168
1.0.0.1
2001:4860:4860::8844
NextDNS
2a07:a8c1::53:54e9
2620:fe::fe
The official source of information for this domain,
managed by the owner of cas.cz .
managed by the owner of cas.cz .
academy.cas.cz
147.231.58.1
The official source of information for this domain,
managed by the owner of cas.cz .
managed by the owner of cas.cz .
nsa.ces.net
195.113.144.205
No MX records found
Canada
50.21.174.242
OpenDns
2620:119:35::35