`johann-jacobs.com`

DNSSEC	⚠️ Not signed
A	2a01:ab20:0:4::64^{🇨🇭 CYON2a01:ab20::/32}
		PTR	`s055.cyon.net`
A	149.126.4.64^{🇨🇭 CYON149.126.0.0/21 cyon GmbH}
NS	`ns1.cyon.ch` ⭐
		A	2a01:ab20:0:185::2^{🇨🇭 CYON2a01:ab20::/32}
		A	185.174.216.2^{🇨🇭 CYON185.174.216.0/22}
			PTR	`ns1.cyon.ch`
NS	`ns2.cyon.ch`
		A	2001:67c:234::2^{🇨🇭 CYON2001:67c:234::/48 cyon GmbH}
		A	91.206.24.2^{🇨🇭 CYON91.206.24.0/23 Cyon GmbH}
			PTR	`ns2.cyon.ch`
MX	`mail.johann-jacobs.com` ⭐
		A	149.126.4.64^{🇨🇭 CYON149.126.0.0/21 cyon GmbH}
			PTR	`s055.cyon.net`
TXT	`v=spf1 include:spf.protection.cyon.net -all`
SOA	`ns1.cyon.ch`server@cyon.ch 2021-02-03 #2

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1778353081

Subdomains

mail.johann-jacobs.com

Same first word

johann-jacobs.com

DNS History

5 records (5 active, 0 former)

●NSns1.cyon.ch2026-04-05 → 2026-05-09 · 2 obs

● 2026-04-05 04:58:58
● 2026-05-09 19:00:04

●NSns2.cyon.ch2026-04-05 → 2026-05-09 · 2 obs

● 2026-04-05 04:58:58
● 2026-05-09 19:00:04

●MXmail.johann-jacobs.com2026-04-05 → 2026-05-09 · 2 obs

● 2026-04-05 04:58:58
● 2026-05-09 19:00:04

●A149.126.4.642026-04-05 → 2026-05-09 · 2 obs

● 2026-04-05 04:58:58
● 2026-05-09 19:00:04

●A2a01:ab20:0:4::642026-04-05 → 2026-05-09 · 2 obs

● 2026-04-05 04:58:58
● 2026-05-09 19:00:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	d.gtld-servers.net, c.gtld-servers.net, i.gtld-servers.net, k.gtld-servers.net...	-
johann-jacobs.com	ns1.cyon.ch, ns2.cyon.ch	-

✅ Authoritative Response

Server:185.174.216.2

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for johann-jacobs.com (unsigned zone)

⏱️ Timing

Total: 594ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`149.126.4.64`
AAAA	1	`2a01:ab20:0:4::64`
NS	2	`ns1.cyon.ch, ns2.cyon.ch`
MX	1	`mail.johann-jacobs.com (pri: 0)`
TXT	1	`v=spf1 include:spf.protection.cyon.net -`
SOA	1	`ns1.cyon.ch server.cyon.ch`

Analysis

Hierarchy

johann-jacobs.com is parent of mail.johann-jacobs.com.

IP Addresses

johann-jacobs.com points to two IP numbers: 2a01:ab20:0:4::64 and 149.126.4.64.

Other host names, for instance onespot.ch, filemaker.literatur.ch, svenbaenziger.ch, mail.the-key.ch and shilling.ch share IP numbers with johann-jacobs.com.

Name Servers

johann-jacobs.com's delegation is to two name servers ns1.cyon.ch and ns2.cyon.ch.

johann-jacobs.com shares the same name server configuration as other domains, such as osd.ch, ula.ch, militarymedicalethics.ch, dmss.ch and maquality.com.

johann-jacobs.com shares name servers with other domains to at least some extent, for instance derpolder.com and gvfi.ch.

Host names with two IP numbers: ns1.cyon.ch points to 2a01:ab20:0:185::2 and 185.174.216.2; ns2.cyon.ch points to 2001:67c:234::2 and 91.206.24.2

Mail Servers

johann-jacobs.com is served by a single mail server, mail.johann-jacobs.com.

mail.johann-jacobs.com points to IP number 149.126.4.64.

johann-jacobs.com - robtex.com