`brethtrans.cz`

DNSSEC	⚠️ Not signed
A	185.99.176.21^{🇨🇿 VODAFONE-CZ-AS185.99.176.0/22 Arenis}
		PTR	`host-185-99-176-21.itexpres.cz`
NS	`ns1.bdm.microsoftonline.com` ⭐
		A	2603:1061:0:700::d0^{🇺🇸 Microsoft2603:1000::/25 MICROSOFT}
			PTR	`ns1-208.azure-dns.com`
		A	13.107.236.208^{🇺🇸 Microsoft13.104.0.0/14 MICROSOFT}
			PTR	`ns1-208.azure-dns.com`
NS	`ns2.bdm.microsoftonline.com`
		A	2620:1ec:8ec:700::d0^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns2-208.azure-dns.net`
		A	150.171.21.208^{🇺🇸 Microsoft150.171.0.0/16 MICROSOFT}
			PTR	`ns2-208.azure-dns.net`
NS	`ns3.bdm.microsoftonline.com` ⚠️ Not in parent delegation
		A	2a01:111:4000:700::d0^{🇬🇧 Microsoft2a01:111:4000::/36}
			PTR	`ns3-208.azure-dns.org`
		A	204.14.183.208^{🇺🇸 Microsoft204.14.180.0/22}
			PTR	`ns3-208.azure-dns.org`
NS	`ns4.bdm.microsoftonline.com` ⚠️ Not in parent delegation
		A	2620:1ec:bda:700::d0^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns4-208.azure-dns.info`
		A	208.84.5.208^{🇺🇸 Microsoft208.84.0.0/21 MICROSOFT}
			PTR	`ns4-208.azure-dns.info`
MX	`brethtrans-cz.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::c^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db9pr02cu00204.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::d^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db6pr03cu00105.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am3pr04cu00500.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::7^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-am9pr04cu00107.inbound.protection.outlook.com`
		A	52.101.68.5^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-du2pr03cu00105.inbound.protection.outlook.com`
		A	52.101.68.10^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-dbbpr03cu00102.inbound.protection.outlook.com`
		A	52.101.68.12^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db9pr02cu00204.inbound.protection.outlook.com`
		A	52.101.73.11^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am1pr04cu00103.inbound.protection.outlook.com`
TXT	`mscid=PNNjNBNC/TUG/2og68Nek02z+brC5KVLt7YgycinG1Y+BRb5W227H/Cbg0kHYeDkaYWHIaY...`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns1.bdm.microsoftonline.com`azuredns-hostmaster@microsoft.com serial=1

`cz`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.ns.nic.cz` ⭐
	NS	`b.ns.nic.cz`
	NS	`c.ns.nic.cz`
	NS	`d.ns.nic.cz`
	SOA	`a.ns.nic.cz`hostmaster@nic.cz serial=1778586435

Subdomains

mail.brethtrans.cz

Same first word

brethtrans.cz

DNS History

7 records (6 active, 1 former)

●NSns1.bdm.microsoftonline.com2015-06-15 → 2026-05-12 · 2 obs

● 2015-06-15 23:55:40
● 2026-05-12 12:14:00

●NSns2.bdm.microsoftonline.com2015-06-15 → 2026-05-12 · 2 obs

● 2015-06-15 23:55:40
● 2026-05-12 12:14:00

●NSns3.bdm.microsoftonline.com2015-06-15 → 2026-05-12 · 2 obs

● 2015-06-15 23:55:40
● 2026-05-12 12:14:00

●NSns4.bdm.microsoftonline.com2015-06-15 → 2026-05-12 · 2 obs

● 2015-06-15 23:55:40
● 2026-05-12 12:14:00

●MXbrethtrans-cz.mail.protection.outlook.com2015-06-15 → 2026-05-12 · 2 obs

● 2015-06-15 23:55:40
● 2026-05-12 12:14:00

●A185.99.176.212016-01-18 → 2026-05-12 · 3 obs

○ 2015-10-23 16:45:04
● 2016-01-18 00:33:28
● 2026-05-12 12:14:00

○A95.173.73.1052015-06-15 → 2015-10-23 · 4 obs

● 2015-06-15 23:55:40
● 2015-10-23 16:45:04
○ 2016-01-18 00:33:28
○ 2026-05-12 12:14:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cz	a.ns.nic.cz, c.ns.nic.cz, b.ns.nic.cz, d.ns.nic.cz	-
brethtrans.cz	ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com	-

✅ Authoritative Response

Server:13.107.236.208

NS records: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for brethtrans.cz (unsigned zone)

⏱️ Timing

Total: 819ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`185.99.176.21`
NS	4	`ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com...`
MX	1	`brethtrans-cz.mail.protection.outlook.co`
TXT	2	`mscid=PNNjNBNC/TUG/2og68Nek02z+brC5KVLt7, v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns1.bdm.microsoftonline.com azuredns-hos`

Analysis

Hierarchy

brethtrans.cz is the parent of mail.brethtrans.cz.

IP Addresses

brethtrans.cz resolves to a single IP address: 185.99.176.21.

Other host names including www.okz.cz, www.spicak.cz, alt2.aspmx.l.google.com.svejk.cz, cechauto.cz and odsavacka.com share IP numbers with brethtrans.cz.

Name Servers

brethtrans.cz is delegated to four name servers: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com and ns4.bdm.microsoftonline.com.

brethtrans.cz at least partially shares name servers with other domains, including tnkent.com, datainvent.com, vimu.ch, hiapl.com and gruberlaw.co.il.