🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`mail.python-tutor.com`

DNSSEC	⚠️ Not signed
A	157.90.66.230^{🇩🇪 Hetzner157.90.0.0/16 HETZNER-DC}
		PTR	`static.230.66.90.157.clients.your-server.de`

`python-tutor.com`

	DNSSEC	⚠️ Not signed
	A	157.90.66.230^{🇩🇪 Hetzner157.90.0.0/16 HETZNER-DC}
	NS	`ns21.kv.de` ⭐
	NS	`ns22.kv.de`
	MX	`mail.python-tutor.com` ⭐
	TXT	`v=spf1 +a +mx +a:www3.kv.de -all`
	TXT	`google-site-verification=KJaQq4NjZoyc8aWfuhXBtSo0rUTxm10mXiZBNL8TsDE`
	SOA	`ns21.kv.de`technik@kv-gmbh.de serial=1749133705

MX for

python-tutor.com

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DNS History

1 record (1 active, 0 former)

●A157.90.66.2302026-10-02 → 2026-10-08 · 2 obs

● 2026-10-02 04:31:28
● 2026-10-08 18:10:46

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
python-tutor.com	ns21.kv.de, ns22.kv.de	-

✅ Authoritative Response

Server:157.90.66.230

NS records: ns21.kv.de, ns22.kv.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for python-tutor.com (unsigned zone)

⏱️ Timing

Total: 1348ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`157.90.66.230`

Analysis

Mail Server Role

The mail server mail.python-tutor.com processes email for python-tutor.com.

IP Addresses

mail.python-tutor.com resolves to just one IP address, 157.90.66.230.

Two other host names, along with web-suche.at, mail.pn.net and trusteddomainname.com, also share IP numbers with mail.python-tutor.com.

mail.python-tutor.com - robtex.com