DNS Gurus
29 records

IPv4 Addresses

TTL

IPv6 Addresses

TTL

Name Servers

TTL
NS —
decsys.vsb.cz
20m
NS —
nsa.ces.net
20m
NS —
nsa.cesnet.cz
20m
NS —
nsa.ten.cz
20m

Mail Servers

TTL
MX — 10
ag1.cesnet.cz
20m
MX — 10
ag2.cesnet.cz
20m

SOA Details

TTL
SOA Primary NS
nsa.cesnet.cz
20m
SOA Responsible
hostmaster.cesnet.cz
SOA Serial
2019102872
SOA Times
Refresh 8h
Retry 2h
Expire 21d
Minimum TTL 1h

Certificate Authority Authorization

TTL
CAA —
0 iodef mailto:[email protected]
20m
CAA HARICA logo
HARICA
0 issue harica.gr
20m
CAA Let's Encrypt logo
Let's Encrypt
0 issue letsencrypt.org
20m
CAA —
0 issuemail ;
20m

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
5m
DMARC Percentage

pct: share of mail that gets quarantine/reject; 100 = all failing messages (default).

100
DMARC RUA

Aggregate DMARC reports (ZIP/XML). Optional but recommended for visibility.

No aggregate report URIs (RUA).
DMARC RUF

Forensic (per-failure) reports. Often omitted for privacy or volume.

No forensic report URIs (RUF).

DKIM

TTL

No DKIM TXT with `v=DKIM1` was returned for the selector names we probe automatically.

SPF (Sender Policy Framework)

TTL
SPF SPFv1
Qualifier Mechanism Target / value Valid Details
- Fail all
—
5m

MTA-STS

TTL

This hostname does not publish an MTA-STS policy (no v=STSv1 TXT at _mta-sts.<name> and/or no policy at https://mta-sts.<name>/.well-known/mta-sts.txt).

DNSSEC Public Keys

TTL
DNSKEY
257 3 13 evenGpNhgI4SgFeoIi3XVMi2EdyEI7W0wJQR5t4P1CLElZSanyCVp/LKPDbUxyc4b1bj1Z8Oagq0NvegaHCpVw==
20m
DNSKEY
256 3 13 zDDJXNM8ThUvUG48Sn0CVxHG36myOdmu1fWym/WO3QRZQ8JJjVTbm4gEVpfHOeKRxBAa0NT4qHR7rtm9B6bleQ==
20m

Delegation Signer

TTL
DS
2482 13 2 E68903EBFE893FD40F83ABC3CFF828A1A633587E0957BDFD4A2D30896B1C0439
20m

DNSSEC Signatures

TTL
RRSIG
SOA 13 2 3600 1787696319 1785098919 10635 cesnet-ca.cz mDLKO8GdpAujluMOdqB9fVyHYoBDNFkAt012ztOQ62HybIyWNzt1rHhnsk01/ozQ/nJCmluhpluPbxlWlp3vmw==
20m
RRSIG
MX 13 2 3600 1787001005 1784403605 10635 cesnet-ca.cz WT/GQwXOTpmejXo5iSK8cOOLsqNc6+89l7Ae0Qp5XnK2FL2xQ0CN1ueacMIUVZbNwbivE0Cm8aozj6eh6LuXuw==
20m
RRSIG
TXT 13 2 300 1787001005 1784403605 10635 cesnet-ca.cz AI0YpKaVCPTm5cnB34umcDjUMddAhIDnBs2eusfReprevF/ayBIZh6+kyWHpkmZX8oTQ9+v19Rlax1tr5QyX3g==
5m
RRSIG
AAAA 13 2 3600 1787001005 1784403605 10635 cesnet-ca.cz a59N7XKs51OhLTmB67PhMMDpMAuInGmDAY101NoXKFSzKXh7x8vF7GXHxOvTTKfRQvFBSvuEAzWPaBeEXwP9SA==
20m
RRSIG
DNSKEY 13 2 3600 1787696319 1785098919 2482 cesnet-ca.cz mUt0Tu/ExJVIdg2P4mMJatnAtVCEOk/revuow0ldCD5GDFnygwkZCyYiPQZUJt5NXXJWfdTjws7GszPtd1ZC8A==
20m
RRSIG
TYPE51 13 2 3600 1787001005 1784403605 10635 cesnet-ca.cz PZXSuR7pyu+eBLndmtUPJ5DYGgN/NOEpQ8Zg591dBBaecD4ALDZkUvWVkqFWbROM8uYX8+PnbpITDWqOlqoKdQ==
20m
RRSIG
TYPE59 13 2 0 1787568238 1784970838 2482 cesnet-ca.cz hz6vvQrlbm45Ewxh5agSF4+P8fm4WdeHKhQOnl6AH/0kIoQfIkvGKUFX/bGeOUF0DQIpgzicJDOESKfwZyJzGw==
10s
RRSIG
TYPE60 13 2 0 1787568238 1784970838 2482 cesnet-ca.cz 0cmAPG8oFqBDzUpv1ZgcXHAv3jOZmWWJIux6EQLv5gl5Euq4InYjDll06kZgpGHHXJugj1If5Hxuc8r8X34ogA==
10s
RRSIG
CAA 13 2 3600 1787001005 1784403605 10635 cesnet-ca.cz b41RA4S4irHOZx+IKyCZkoP1IHmBC1UqatjhFbsFiQyEkZGx7bIiRgimRo4WXKe4VjZLqoGCpVh0oTRHnSmfFQ==
20m
RRSIG
A 13 2 3600 1787001005 1784403605 10635 cesnet-ca.cz pCzaCsOP10VkAhhmp6H/ENFO/kV09gJVu1hw55UMLHRT3uIWVQD8oQSiem/lwiqHyVG9676ZDQfzIG2c6J7vdQ==
20m
RRSIG
NS 13 2 3600 1787001005 1784403605 10635 cesnet-ca.cz NDehlKKEPqet2r1qyk6AparPca/dE70/rLthH+BsIEZVzwMfwQWAW0C3b8z9DF5Rgr9JAWOQVrBzJMLU2/I4BA==
20m