DNS Records for ipv6.cz - DNS Lookup Tool

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

ag2.cesnet.cz

20m

MX — 10

ag1.cesnet.cz

20m

SOA Details

TTL

SOA Primary NS

dns.cesnet.cz

20m

SOA Responsible

hostmaster.cesnet.cz

SOA Serial

2026032529

SOA Times

Refresh 8h

Retry 2h

Expire 14d

Minimum TTL 1d

Certificate Authority Authorization

TTL

No CAA records were returned at this registrable domain name. With no CAA policy, any public certificate authority (CA) may issue TLS certificates for names under this zone unless a parent publishes CAA; add issue / issuewild / iodef records to restrict issuance.

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 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	—

20m

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).