`mail.re4.ch`

DNSSEC	⚠️ Not signed
A	2a01:ab20:0:4::151^{🇨🇭 CYON2a01:ab20::/32}
		PTR	`s142.cyon.net`
A	149.126.4.151^{🇨🇭 CYON149.126.0.0/21 cyon GmbH}

`re4.ch`

	DNSSEC	🔒 Signed (DS record present)
	A	2a01:ab20:0:4::151^{🇨🇭 CYON2a01:ab20::/32}
	A	149.126.4.151^{🇨🇭 CYON149.126.0.0/21 cyon GmbH}
	NS	`ns1.cyon.ch` ⭐
	NS	`ns2.cyon.ch`
	MX	`mail.re4.ch` ⭐
	TXT	`v=spf1 include:spf.protection.cyon.net -all`
	SOA	`ns1.cyon.ch`server@cyon.ch 2026-05-29 #3

MX for

re4.ch

Same first word

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DNS History

3 records (2 active, 1 former)

●A149.126.4.1512026-06-11 → 2026-08-14 · 3 obs

○ 2026-05-26 02:03:52
● 2026-06-11 20:13:18
● 2026-08-14 15:52:14

●A2a01:ab20:0:4::1512026-06-11 → 2026-08-14 · 3 obs

○ 2026-05-26 02:03:52
● 2026-06-11 20:13:18
● 2026-08-14 15:52:14

○A80.74.145.252008-08-14 → 2026-05-26 · 4 obs

● 2008-08-14 13:17:06
● 2026-05-26 02:03:52
○ 2026-06-11 20:13:18
○ 2026-08-14 15:52:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
ch	a.nic.ch, f.nic.ch, e.nic.ch, b.nic.ch...	-
re4.ch	ns2.cyon.ch, ns1.cyon.ch	4 records

✅ Authoritative Response

Server:91.206.24.2

NS records: ns2.cyon.ch, ns1.cyon.ch

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 628ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`149.126.4.151`
AAAA	1	`2a01:ab20:0:4::151`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns2.cyon.ch, ns1.cyon.ch, ns2.cyon.ch...)

Analysis

Mail Server Role

re4.ch uses mail.re4.ch as a mail server.

IP Addresses

mail.re4.ch points to the IP addresses 149.126.4.151 and 2a01:ab20:0:4::151

zeichenlehrer.ch, mail.zeichenlehrer.ch, itacademy.ch and two other host names share IP numbers with mail.re4.ch.

mail.re4.ch - robtex.com

mail.re4.ch

re4.ch