19
records
IPv4 Addresses
TTL
fel.cvut.cz. 1200 IN A 147.32.208.20
IPv6 Addresses
TTL
fel.cvut.cz. 1199 IN AAAA 2001:718:2:1504:0:0:0:20
Name Servers
TTL
fel.cvut.cz. 1200 IN NS ns-01.fel.cvut.cz. fel.cvut.cz. 1200 IN NS ns-02.fel.cvut.cz. fel.cvut.cz. 1200 IN NS nsa.ces.net.
Mail Servers
TTL
MX
—
10
19m
MX
—
20
19m
fel.cvut.cz. 1199 IN MX 10 max2.feld.cvut.cz. fel.cvut.cz. 1199 IN MX 20 max3.feld.cvut.cz.
SOA Details
TTL
19m
SOA
Responsible
hostmaster.fel.cvut.cz
SOA
Serial
1784418926
SOA
Times
Refresh
15m
Retry
5m
Expire
14d
Minimum TTL
10m
fel.cvut.cz. 1199 IN SOA ns-01.fel.cvut.cz. hostmaster.fel.cvut.cz. 1784418926 900 300 1209600 600
DMARC
TTL
DMARC
Policy
Organizational policy (p): how receivers treat mail that fails aligned DMARC checks — none (monitor only), quarantine (often junk), or reject (block).
none
quarantine
reject
20m
DMARC
Subdomain Policy
Subdomain policy (sp): when set, it applies to hostnames below this domain instead of p; if omitted, subdomains inherit the organizational policy.
none
quarantine
reject
DMARC
Percentage
pct: share of mail that gets quarantine/reject; 100 = all failing messages (default).
100
DMARC
RUA
mailto:[email protected]
Aggregate DMARC reports (ZIP/XML). Optional but recommended for visibility.
DMARC
RUF
Forensic (per-failure) reports. Often omitted for privacy or volume.
No forensic report URIs (RUF).
fel.cvut.cz. 1200 IN DMARC v=DMARC1; p=quarantine; pct=100; rua=mailto:[email protected]; adkim=r; aspf=r; sp=none
DKIM
TTL
DKIM
Selector
k2
v=DKIM1
k=rsa
18m
Public Key
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOw...
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA0b90ObWaLDc+i9MtTNmGeWO009hr20fIxhGg6XBT2kjZ1DTThopSe1nAndsupmcBwlQ5Q6LJ+ZAxLcujnPIxM0ZBLmgpkv8u6RfY4eFP8OLvdAW3oSuB0DyLDigQX4Sj8wBO4YIdQH6AAmBeOsidsKAFNFUCpc3vCxtBDR12U+cBg724l3sBkMQ8evnz6idnqxq9QAVYh8k4kJ+RP+6cqTdy7LjIm8xY/bQNpQIpGUAuDo2DjLcCDun9DAI4Q/3z+Q0o9QuQIDAQAB
DKIM
Selector
k3
v=DKIM1
k=rsa
18m
Public Key
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsYGiMSn7fsUq...
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsYGiMSn7fsUqSvfSX40x9R1OlRtbNiCY80lHRIlcKx3XDIR7257aUx+q9CSIARdfTL6KCuLGNFx5g9TgVr6png4ajcieSQGtOehBgxnkDN8aAA5TX0FmFrcefJU0JoxLOF09EKgXxhSSHCk/ekVb0PXSboHXoZ9+EI404F1qhcwXXIgHXTaUthHTut2P6BBZhIXIgvDe/w49GchR7MRJqjNb7neEBbYHbgWuBTvvHCg7Gy6m6n9krYK+ROWq3dVvXy9plAGK3ygM+HtjIiMt7arRGMOF0WgDTz7YdN9BGpt6BvXxLnjiQcgS5T9n+cIyPZgiWzDMXNlaEEdKTEKxrwIDAQAB
fel.cvut.cz. 1082 IN DKIM v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA0b90ObWaLDc+i9MtTNmGeWO009hr20fIxhGg6XBT2kjZ1DTThopSe1nAndsupmcBwlQ5Q6LJ+ZAxLcujnPIxM0ZBLmgpkv8u6RfY4eFP8OLvdAW3oSuB0DyLDigQX4Sj8wBO4YIdQH6AAmBeOsidsKAFNFUCpc3vCxtBDR12U+cBg724l3sBkMQ8evnz6idnqxq9QAVYh8k4kJ+RP+6cqTdy7LjIm8xY/bQNpQIpGUAuDo2DjLcCDun9DAI4Q/3z+Q0o9QuQIDAQAB; fel.cvut.cz. 1082 IN DKIM v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsYGiMSn7fsUqSvfSX40x9R1OlRtbNiCY80lHRIlcKx3XDIR7257aUx+q9CSIARdfTL6KCuLGNFx5g9TgVr6png4ajcieSQGtOehBgxnkDN8aAA5TX0FmFrcefJU0JoxLOF09EKgXxhSSHCk/ekVb0PXSboHXoZ9+EI404F1qhcwXXIgHXTaUthHTut2P6BBZhIXIgvDe/w49GchR7MRJqjNb7neEBbYHbgWuBTvvHCg7Gy6m6n9krYK+ROWq3dVvXy9plAGK3ygM+HtjIiMt7arRGMOF0WgDTz7YdN9BGpt6BvXxLnjiQcgS5T9n+cIyPZgiWzDMXNlaEEdKTEKxrwIDAQAB;
SPF (Sender Policy Framework)
TTL
SPF
SPFv1
| Qualifier | Mechanism | Target / value | Valid | Details |
|---|---|---|---|---|
| + Pass | ip4 |
|
||
| + Pass | ip6 |
|
||
| + Pass | ip4 |
|
||
| + Pass | ip6 |
|
||
| + Pass | include |
|
||
| + Pass | include |
|
||
| ~ Softfail | all |
—
|
|
20m
fel.cvut.cz. 1200 IN TXT "v=spf1 ip4:147.32.210.129/25 ip6:2001:718:2:1516::/64 ip4:147.32.208.25 ip6:2001:718:2:1504::25 include:_spf.google.com include:cvut.cz ~all"
Text Content
TTL
ZOOM_verify_TWxOWhfuT9S2U8iR_P8BzA
20m
google-site-verification=65rp8Rl6pbKJ4IxcyP54-BwaT8YQG20_60cjcP-INmk
20m
openai-domain-verification=dv-v35YzsxjCAonMfSwv4jfZJBA
20m
fel.cvut.cz. 1200 IN TXT "ZOOM_verify_TWxOWhfuT9S2U8iR_P8BzA" fel.cvut.cz. 1200 IN TXT "google-site-verification=65rp8Rl6pbKJ4IxcyP54-BwaT8YQG20_60cjcP-INmk" fel.cvut.cz. 1200 IN TXT "openai-domain-verification=dv-v35YzsxjCAonMfSwv4jfZJBA"
DNSSEC Public Keys
TTL
DNSKEY
256 3 13 qNciKWzvY59ub4uhxO6kBA3SlY8OTpdROlla+7sajTdYZFZhNH0HocZ1EaLeOduO8DlZVS7UrGNib/4juhpaBw==
20m
DNSKEY
257 3 13 q93HzmsIQn8US7PUAkbvXSSlvwu1Q40uI8M5OdClE/7XOIqFXWFShBjW6Vw2rvqhChlwVJeSmhorxbAODKTR8Q==
20m
fel.cvut.cz. 1200 IN DNSKEY 256 3 13 qNciKWzvY59ub4uhxO6kBA3SlY8OTpdROlla+7sajTdYZFZhNH0HocZ1EaLeOduO8DlZVS7UrGNib/4juhpaBw== fel.cvut.cz. 1200 IN DNSKEY 257 3 13 q93HzmsIQn8US7PUAkbvXSSlvwu1Q40uI8M5OdClE/7XOIqFXWFShBjW6Vw2rvqhChlwVJeSmhorxbAODKTR8Q==
Delegation Signer
TTL
DS
62068 13 2 297F0B1AB8CC3386C1999696B722D8AAFE8DAE51F22866620C38E25F75B087F7
20m
fel.cvut.cz. 1200 IN DS 62068 13 2 297F0B1AB8CC3386C1999696B722D8AAFE8DAE51F22866620C38E25F75B087F7
DNSSEC Next Secure
TTL
NSEC
feld.cvut.cz ["NSEC", "RRSIG", "DS", "NS"]
20m
fel.cvut.cz. 1200 IN NSEC feld.cvut.cz ["NSEC", "RRSIG", "DS", "NS"]