🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`mail.nullstack.ch`

DNSSEC	⚠️ Not signed
A	2a0a:4cc0:c0:7b2b::1^{🇦🇹 netcup-AS2a0a:4cc0:c0::/43}
		PTR	`mail.nullstack.ch`
A	152.53.226.63^{🇦🇹 netcup-AS152.53.224.0/22}
TXT	`v=spf1 a -all`

`nullstack.ch`

	DNSSEC	⚠️ Not signed
	A	2a0a:4cc0:c0:7b2b::1^{🇦🇹 netcup-AS2a0a:4cc0:c0::/43}
	A	152.53.226.63^{🇦🇹 netcup-AS152.53.224.0/22}
	NS	`root-dns.netcup.net` ⭐
	NS	`second-dns.netcup.net`
	NS	`third-dns.netcup.net`
	MX	`mail.nullstack.ch` ⭐
	TXT	`v=spf1 mx -all`
	SOA	`root-dns.netcup.net`dnsadmin@netcup.net 2026-11-07 #23

PTR for

1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.b.2.b.7.0.c.0.0.0.c.c.4.a.0.a.2.ip6.arpa

63.226.53.152.in-addr.arpa

MX for

nullstack.ch

Same first word

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mail.kiev.ua

mail.mydns.tw

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mail.report

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Previous names

Next names

DNS History

2 records (2 active, 0 former)

●A152.53.226.632026-11-04 → 2026-11-06 · 2 obs

● 2026-11-04 17:40:16
● 2026-11-06 16:05:12

●A2a0a:4cc0:c0:7b2b::12026-11-04 → 2026-11-06 · 2 obs

● 2026-11-04 17:40:16
● 2026-11-06 16:05:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
ch	a.nic.ch, b.nic.ch, d.nic.ch, e.nic.ch...	10 records
nullstack.ch	second-dns.netcup.net, third-dns.netcup.net, root-dns.netcup.net	-

✅ Authoritative Response

Server:46.38.225.225

NS records: second-dns.netcup.net, third-dns.netcup.net, root-dns.netcup.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for nullstack.ch (unsigned zone)

⏱️ Timing

Total: 923ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`152.53.226.63`
AAAA	1	`2a0a:4cc0:c0:7b2b::1`
TXT	1	`v=spf1 a -all`

📌 Glue Records Collected

Total: 10

In-bailiwick: 10 (a.nic.ch, b.nic.ch, d.nic.ch...)

Analysis

Mail Server Role

The mail server mail.nullstack.ch processes email for nullstack.ch.

IP Addresses

mail.nullstack.ch resolves to the IP addresses 152.53.226.63 and 2a0a:4cc0:c0:7b2b::1

nullstack.ch is an example of another host name that shares IP numbers with mail.nullstack.ch.

mail.nullstack.ch - robtex.com