DNS Records for flab.cz - DNS Lookup Tool

IPv4 Addresses

TTL

A AS2852

78.128.216.243

doku2.cesnet.cz

20m

IPv6 Addresses

TTL

AAAA AS2852

2001:718:FF05:202:0:0:0:243

doku2.cesnet.cz

20m

Name Servers

TTL

NS —

nsa.ces.net

20m

NS —

nsa.cesnet.cz

20m

Mail Servers

TTL

MX — 10

ag2.cesnet.cz

20m

MX — 10

ag1.cesnet.cz

20m

SOA Details

TTL

SOA Primary NS

nsa.cesnet.cz

20m

SOA Responsible

hostmaster.cesnet.cz

SOA Serial

2019102154

SOA Times

Refresh 8h

Retry 2h

Expire 21d

Minimum TTL 15m

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
+ Pass	include	cesnet.cz
- 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).