`mx20.masterit.cz`

DNSSEC	⚠️ Not signed
A	94.229.86.89^{🇨🇿 Master_IT_Technologies94.229.86.0/24 MASTER IT Technologies, a.s.}
		PTR	`mx20.masterit.cz`

`masterit.cz`

	DNSSEC	🔒 Signed (DS record present)
	A	2a01:28:ca:112::1:968^{🇨🇿 SuperNetwork2a01:28::/32 s.r.o.}
	A	88.86.124.239^{🇨🇿 SuperNetwork88.86.96.0/19 s.r.o.}
	NS	`ns1.ignum.com` ⭐
	NS	`ns2.ignum.cz`
	MX	`aspmx.l.google.com` ⭐
	MX	`alt1.aspmx.l.google.com`⁽⁵⁾
	MX	`alt2.aspmx.l.google.com`⁽⁵⁾
	MX	`alt3.aspmx.l.google.com`⁽¹⁰⁾
	MX	`alt4.aspmx.l.google.com`⁽¹⁰⁾
	MX	`mx20.masterit.cz`⁽⁹⁹⁾
	TXT	`MS=B0D67B646D79FD4B45DFB1A34FAE58684E6649E3`
	TXT	`5d6715a9dbcd93f136bee692fae0f3ba4d07cb7d855454a81e2f5c620f0fdee`
	TXT	`c1ffbc7f6ed69a29edebcd330a463a1ebc1b0970d49bf356e3030bef0af4f22`
	TXT	`e72cd6c55236fcb0ecf048e8c77aece43860650e0d77850c68d4589fd3e760e`
	TXT	`v=spf1 a:mx20.masterit.cz a:nagios.masterit.cz include:_spf.google.com -all`
	SOA	`ns1.ignum.com`hostmaster@ignum.cz 2026-04-29 #1

PTR for

89.86.229.94.in-addr.arpa

MX for

brill.cz

steeltec.cz

masterit.cz

chytrejsiobec.cz

profaktum.cz

masservice.cz

Previously MX for

domovvesna.cz

kern-dr.com

petrklic.cz

kern-dr.cz

dkpoklad.cz

Same first word

mx20.com

mx20.org

mx20.de

Similar names

mx02.gov.mz

mx02.ru

mx02.de

02xm.top

mx02.123hjemmeside.dk

m20x.com

20xm.cn

mx02.gov.bf

xm02.com

xm20.top

xm20.com

xm02.net

20xm.com

02xm.com

mx02.kinghost.net

mx02.gov.jo

20mx.com

DNS History

4 records (1 active, 3 former)

○A82.99.160.1952016-03-16 → 2017-01-03 · 5 obs

○ 2016-01-29 04:31:30
● 2016-03-16 12:41:12
● 2017-01-03 04:23:30
○ 2026-02-15 19:52:50
○ 2026-05-11 21:33:00

○A93.153.125.1342015-06-25 → 2016-01-29 · 4 obs

● 2015-06-25 18:08:18
● 2016-01-29 04:31:30
○ 2016-03-16 12:41:12
○ 2026-05-11 21:33:00

●A94.229.86.892026-02-15 → 2026-05-11 · 3 obs

○ 2017-01-03 04:23:30
● 2026-02-15 19:52:50
● 2026-05-11 21:33:00

○CNAMEsmtp-jav.masterit.cz2015-06-25 → 2026-02-17 · 4 obs

● 2015-06-25 18:08:18
● 2026-02-17 07:46:16
○ 2026-02-19 01:25:02
○ 2026-05-11 21:33:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, b.ns.nic.cz, c.ns.nic.cz, d.ns.nic.cz	-
masterit.cz	ns1.ignum.com, ns2.ignum.cz	2 records

✅ Authoritative Response

Server:185.65.223.35

NS records: ns1.ignum.com, ns2.ignum.cz

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 3729ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`94.229.86.89`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns2.ignum.cz, ns2.ignum.cz)

Analysis

Mail Server Role

mx20.masterit.cz serves as the mail server for brill.cz, steeltec.cz, masterit.cz, chytrejsiobec.cz, profaktum.cz and a few other domains.

mail.brill.cz, backup.steeltec.cz and mail.steeltec.cz commonly serve as mail servers alongside mx20.masterit.cz.

IP Addresses

mx20.masterit.cz resolves to a single IP: 94.229.86.89.

mx20.masterit.cz - robtex.com

mx20.masterit.cz

masterit.cz