math.slu.cz - robtex.com

math.slu.cz

DNSSEC⚠️ Not signed
A2001:718:2201:208::11🇨🇿 CESNET2001:718::/32 6-TCZ
PTRwaldo.opf.slu.cz
A193.84.208.11🇨🇿 CESNET193.84.208.0/20
NSmath.slu.cz ⭐
A2001:718:2201:208::11🇨🇿 CESNET2001:718::/32 6-TCZ
PTRwaldo.opf.slu.cz
A193.84.208.11🇨🇿 CESNET193.84.208.0/20
PTRwaldo.opf.slu.cz
NSdecsys.vsb.cz ⚠️ Not in parent delegation
A2001:718:1001:149::9🇨🇿 CESNET2001:718::/32 6-TCZ
A158.196.149.9🇨🇿 CESNET158.196.0.0/16 VSB-TCZ
PTRdecsys.vsb.cz
NSns1.slu.cz ⚠️ Not in parent delegation
A2001:718:2601:386::64🇨🇿 CESNET2001:718::/32 6-TCZ
PTRns1.slu.cz
A193.84.206.100🇨🇿 CESNET193.84.192.0/20
PTRns1.slu.cz
NSns2.slu.cz ⚠️ Not in parent delegation
A2001:718:2201:209::5🇨🇿 CESNET2001:718::/32 6-TCZ
A193.84.209.5🇨🇿 CESNET193.84.208.0/20
PTRns2.slu.cz
NSnsa.ces.net ⚠️ Not in parent delegation
A2001:718:1:1::144:205🇨🇿 CESNET2001:718::/32 6-TCZ
PTRnsa.ces.net
A195.113.144.205🇨🇿 CESNET195.113.0.0/16 -TCZ
PTRnsa.ces.net
NSrock.math.slu.cz ⚠️ Not in parent delegation
A193.84.193.10🇨🇿 CESNET193.84.192.0/20
PTRrock.math.slu.cz
MXmx1.slu.cz ⭐
A2001:718:2601:386::74🇨🇿 CESNET2001:718::/32 6-TCZ
PTRmx1.slu.cz
A193.84.206.116🇨🇿 CESNET193.84.192.0/20
PTRmx1.slu.cz
MXmx2.slu.cz(20)
A2001:718:2201:209::24🇨🇿 CESNET2001:718::/32 6-TCZ
PTRmx2.slu.cz
A193.84.209.24🇨🇿 CESNET193.84.208.0/20
PTRmx2.slu.cz
TXTMS=635A2EE64303FB7639582381C64A10DF4D26D9D6
TXTv=spf1 mx include:spf.slu.cz include:spf.protection.outlook.com a:pebble.math...
SOAmath.slu.czadmin@math.slu.cz 2025-12-11 #1

slu.cz

DNSSEC⚠️ Not signed
A2001:718:2201:208::11🇨🇿 CESNET2001:718::/32 6-TCZ
A193.84.208.11🇨🇿 CESNET193.84.208.0/20
NSns1.slu.cz ⭐
NSdecsys.vsb.cz ⚠️ Not in parent delegation
NSns2.slu.cz
NSnsa.ces.net ⚠️ Not in parent delegation
MXmx1.slu.cz ⭐
MXmx2.slu.cz(20)
TXTfacebook-domain-verification=8vjx70bk5qmonkyop2oql96vx4nmwj
TXTgoogle-site-verification=YgvvJLb2akH8OZ_ai1aKyojtfh3-TLFteSyvVGwn7PQ
TXTv=spf1 mx include:spf.slu.cz include:spf.protection.outlook.com a:anxur.fi.mu...
TXTMS=ms67145611
SOAns1.slu.czhostmaster@slu.cz 2026-04-01 #26
WOT: SAFE (65/100)
rank #104774 globally
rank #305 in the tld
WOT: SAFE (80/100)
📈 Tranco rank: #59,884

NS for

math.slu.cz

Subdomains

hynbar.math.slu.cz
milibrlw.math.slu.cz
micmar.math.slu.cz
rock.math.slu.cz

Same first word

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DNS History

16 records (10 active, 6 former)

20162017201820192020202120222023202420252026NSdecsys.vsb.czmath.slu.czns1.slu.czns2.slu.cznsa.ces.netrock.math.slu.czns.ces.netMXmx1.slu.czmx2.slu.czrock.math.slu.czsmtp.opf.slu.czsmtp.slu.czA193.84.208.112001:718:2201:208::11193.84.206.762001:718:2601:386::4c
●NSdecsys.vsb.cz2015-06-20 → 2026-04-08 · 2 obs
● 2015-06-20 20:02:22
● 2026-04-08 01:57:40
●NSmath.slu.cz2017-08-20 → 2026-04-08 · 3 obs
○ 2016-04-11 17:15:06
● 2017-08-20 11:46:32
● 2026-04-08 01:57:40
○NSns.ces.net2015-06-20 → 2017-09-13 · 4 obs
● 2015-06-20 20:02:22
● 2017-09-13 19:20:12
○ 2026-02-22 17:47:22
○ 2026-04-08 01:57:40
●NSns1.slu.cz2015-06-20 → 2026-04-08 · 2 obs
● 2015-06-20 20:02:22
● 2026-04-08 01:57:40
●NSns2.slu.cz2015-06-20 → 2026-04-08 · 2 obs
● 2015-06-20 20:02:22
● 2026-04-08 01:57:40
●NSnsa.ces.net2026-02-22 → 2026-04-08 · 3 obs
○ 2017-09-13 19:20:12
● 2026-02-22 17:47:22
● 2026-04-08 01:57:40
●NSrock.math.slu.cz2015-06-20 → 2026-04-08 · 5 obs
● 2015-06-20 20:02:22
● 2016-04-11 17:15:06
○ 2017-08-20 11:46:32
● 2017-09-13 19:20:12
● 2026-04-08 01:57:40
●MXmx1.slu.cz2026-02-22 → 2026-04-08 · 3 obs
○ 2017-09-13 19:20:12
● 2026-02-22 17:47:22
● 2026-04-08 01:57:40
●MXmx2.slu.cz2026-02-22 → 2026-04-08 · 3 obs
○ 2017-09-13 19:20:12
● 2026-02-22 17:47:22
● 2026-04-08 01:57:40
○MXrock.math.slu.cz2017-08-20 → 2017-09-13 · 5 obs
○ 2015-06-20 20:02:22
● 2017-08-20 11:46:32
● 2017-09-13 19:20:12
○ 2026-02-22 17:47:22
○ 2026-04-08 01:57:40
○MXsmtp.opf.slu.cz2015-06-20 → 2017-09-13 · 4 obs
● 2015-06-20 20:02:22
● 2017-09-13 19:20:12
○ 2026-02-22 17:47:22
○ 2026-04-08 01:57:40
○MXsmtp.slu.cz2015-06-20 → 2017-09-13 · 4 obs
● 2015-06-20 20:02:22
● 2017-09-13 19:20:12
○ 2026-02-22 17:47:22
○ 2026-04-08 01:57:40
○A193.84.206.762015-06-20 → 2017-09-13 · 4 obs
● 2015-06-20 20:02:22
● 2017-09-13 19:20:12
○ 2026-02-22 17:47:22
○ 2026-04-08 01:57:40
●A193.84.208.112026-02-22 → 2026-04-08 · 3 obs
○ 2017-09-13 19:20:12
● 2026-02-22 17:47:22
● 2026-04-08 01:57:40
●A2001:718:2201:208::112026-02-22 → 2026-04-08 · 3 obs
○ 2017-09-13 19:20:12
● 2026-02-22 17:47:22
● 2026-04-08 01:57:40
○A2001:718:2601:386::4c2017-08-20 → 2017-09-13 · 5 obs
○ 2015-06-20 20:02:22
● 2017-08-20 11:46:32
● 2017-09-13 19:20:12
○ 2026-02-22 17:47:22
○ 2026-04-08 01:57:40

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cza.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz-
slu.czns1.slu.cz, ns2.slu.cz, nsa.ces.net, decsys.vsb.cz6 records

✅ Authoritative Response

Server:193.84.206.100

NS records: ns1.slu.cz, ns2.slu.cz, nsa.ces.net, decsys.vsb.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1246ms | Queries: -

📄 Records

TypeCountSample Data
A1193.84.208.11
AAAA12001:718:2201:208::11
NS5rock.math.slu.cz, decsys.vsb.cz...
MX2mx2.slu.cz (pri: 20), mx1.slu.cz (pri: 10)
TXT2MS=635A2EE64303FB7639582381C64A10DF4D26D, v=spf1 mx include:spf.slu.cz include:spf
SOA1math.slu.cz admin.math.slu.cz

📌 Glue Records Collected

Total: 6

In-bailiwick: 4 (ns1.slu.cz, ns1.slu.cz, ns2.slu.cz...)

Out-of-bailiwick: 2 (decsys.vsb.cz, decsys.vsb.cz)

Analysis

Hierarchy

math.slu.cz is a parent of hynbar.math.slu.cz, milibrlw.math.slu.cz, micmar.math.slu.cz and rock.math.slu.cz.

Name Server Role

math.slu.cz serves as a name server for math.slu.cz.

ns1.slu.cz, ns2.slu.cz and decsys.vsb.cz are commonly used as name servers together with math.slu.cz.

IP Addresses

math.slu.cz resolves to two IPs: 2001:718:2201:208::11 and 193.84.208.11.

Other host names, for instance fpf.slu.cz, waldo.opf.slu.cz, slu.cz and fvp.slu.cz share IP numbers with math.slu.cz.

Name Servers

math.slu.cz is delegated to six name servers: math.slu.cz, ns1.slu.cz, ns2.slu.cz, decsys.vsb.cz, nsa.ces.net and rock.math.slu.cz.

math.slu.cz at least partially shares name servers with other domains, for instance fvp.slu.cz, vsb.cz, 162.113.195.in-addr.arpa, 98.83.113.195.in-addr.arpa and issn.cz.

These name servers are often used together with the name servers nsa.cesnet.cz, nsa.ten.cz, ns-01.fel.cvut.cz, ns-02.fel.cvut.cz, ns1.cro.cz, ns2.cro.cz, dns.upce.cz, 193.84.193.in-addr.arpa, ekf2.vsb.cz and decsu.fpf.slu.cz.

Host names with two IP numbers:

math.slu.cz points to 2001:718:2201:208::11 and 193.84.208.11

ns1.slu.cz points to 2001:718:2601:386::64 and 193.84.206.100

ns2.slu.cz points to 2001:718:2201:209::5 and 193.84.209.5

decsys.vsb.cz points to 2001:718:1001:149::9 and 158.196.149.9

nsa.ces.net points to 2001:718:1:1::144:205 and 195.113.144.205

Host names with one IP number:

rock.math.slu.cz points to 193.84.193.10

Mail Servers

math.slu.cz is handled by two mail servers: mx1.slu.cz and mx2.slu.cz.

math.slu.cz uses the same mail server setup as other domains, for example slu.cz, fvp.slu.cz, fpf.slu.cz and opf.slu.cz.

Host names with two IP numbers:

mx1.slu.cz points to 2001:718:2601:386::74 and 193.84.206.116

mx2.slu.cz points to 2001:718:2201:209::24 and 193.84.209.24