ciisb.org - robtex.com

ciisb.org

DNSSEC⚠️ Not signed
A147.251.5.239🇨🇿 CESNET147.251.0.0/16 MUNI-TCZ
NSns2.muni.cz ⭐
A2001:718:801:406::10🇨🇿 CESNET2001:718::/32 6-TCZ
PTRns2.muni.cz
A147.251.6.10🇨🇿 CESNET147.251.0.0/16 MUNI-TCZ
NSns.muni.cz
A2001:718:801:404::33🇨🇿 CESNET2001:718::/32 6-TCZ
A147.251.4.33🇨🇿 CESNET147.251.0.0/16 MUNI-TCZ
MXrelay.muni.cz ⭐
A147.251.4.35🇨🇿 CESNET147.251.0.0/16 MUNI-TCZ
TXTMS=ms44236633
TXTv=spf1 include:_spf.muni.cz ~all
SOAns.muni.czmoucka@ics.muni.cz 2019-12-06 #1

org

DNSSEC🔒 Signed (DS record present)
NSa0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation
NSa2.org.afilias-nst.info ⚠️ Not in parent delegation
NSb0.org.afilias-nst.org
NSb2.org.afilias-nst.org
NSc0.org.afilias-nst.info ⚠️ Not in parent delegation
NSd0.org.afilias-nst.org
SOAa0.org.afilias-nst.infohostmaster@donuts.email serial=1784117823

Subdomains

www.ciisb.org

Same first word

ciisb.org
ciisb.com

Similar names

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DNS History

4 records (4 active, 0 former)

NSns.muni.czns2.muni.czMXrelay.muni.czA147.251.5.239
●NSns.muni.cz2026-07-04 → 2026-07-15 · 2 obs
● 2026-07-04 22:31:04
● 2026-07-15 12:36:46
●NSns2.muni.cz2026-07-04 → 2026-07-15 · 2 obs
● 2026-07-04 22:31:04
● 2026-07-15 12:36:46
●MXrelay.muni.cz2026-07-04 → 2026-07-15 · 2 obs
● 2026-07-04 22:31:04
● 2026-07-15 12:36:46
●A147.251.5.2392026-07-04 → 2026-07-15 · 2 obs
● 2026-07-04 22:31:04
● 2026-07-15 12:36:46

🔍 DNS Trace

Analysis

Hierarchy

www.ciisb.org is a subdomain of ciisb.org.

IP Addresses

ciisb.org resolves to one IP address: 147.251.5.239.

celspac.com, cerit-sc.cz, telc.muni.cz and two other host names share IP numbers with ciisb.org.

Name Servers

ciisb.org is served by two delegated name servers, ns2.muni.cz and ns.muni.cz.

ciisb.org uses the same name servers as several other domains — among them 212.251.147.in-addr.arpa, darujmuni.cz, eosc.cz and two more.

The name servers of ciisb.org overlap at least partially with those of other domains — among them 108.251.147.in-addr.arpa, 185.251.147.in-addr.arpa, thesis.cz and two more.

These name servers commonly appear in delegations together with nsa.ces.net, ns.ukb.muni.cz, anxur.fi.muni.cz and 7 other.

Each of the two host names carries two IP addresses: ns2.muni.cz points to 147.251.6.10 and 2001:718:801:406::10, and ns.muni.cz points to 147.251.4.33 and 2001:718:801:404::33.

Mail Servers

Mail for ciisb.org is handled by a single mail server, relay.muni.cz.

ciisb.org uses an identical mail server configuration to several other domains — among them fidentis.cz, haie-app.fi.muni.cz, mailman.muni.cz and two more.

ciisb.org has at least partial mail server overlap with other domains such as pops-gmp.com, video.muni.cz, cstug.cz and two more.

There is one IP number for relay.muni.cz: 147.251.4.35.