`opensource-book.com`

DNSSEC	⚠️ Not signed
A	85.13.134.57^{🇩🇪 NMM-AS85.13.134.0/24 Neue Medien Muennich}
		PTR	`dd21412.kasserver.com`
NS	`ns5.kasserver.com` ⭐
		A	85.13.128.3^{🇩🇪 NMM-AS85.13.128.0/24 Neue Medien Muennich}
			PTR	`ns5.kasserver.com`
NS	`ns6.kasserver.com`
		A	85.13.159.101^{🇩🇪 NMM-AS85.13.159.0/24 Neue Medien Muennich}
			PTR	`ns6.kasserver.com`
MX	`w00b0c0c.kasserver.com` ⭐
		A	85.13.134.57^{🇩🇪 NMM-AS85.13.134.0/24 Neue Medien Muennich}
			PTR	`dd21412.kasserver.com`
TXT	`v=spf1 a mx include:spf.kasserver.com ~all`
SOA	`ns5.kasserver.com`hostmaster@kasserver.com serial=2602221239

`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=1774422097

Subdomains

mail.opensource-book.com

DNS History

8 records (4 active, 4 former)

●NSns5.kasserver.com2015-06-03 → 2026-03-25 · 2 obs

● 2015-06-03 13:12:40
● 2026-03-25 07:06:38

●NSns6.kasserver.com2015-06-03 → 2026-03-25 · 2 obs

● 2015-06-03 13:12:40
● 2026-03-25 07:06:38

○MXmail.opensource-book.com2015-06-03 → 2016-09-24 · 4 obs

● 2015-06-03 13:12:40
● 2016-09-24 08:26:52
○ 2017-05-14 08:54:52
○ 2026-03-25 07:06:38

●MXw00b0c0c.kasserver.com2017-05-14 → 2026-03-25 · 3 obs

○ 2016-09-24 08:26:52
● 2017-05-14 08:54:52
● 2026-03-25 07:06:38

○A85.13.129.1022016-03-28 → 2017-05-14 · 5 obs

○ 2015-12-29 02:39:06
● 2016-03-28 15:12:50
● 2017-05-14 08:54:52
○ 2026-03-25 07:06:36
○ 2026-03-25 07:06:38

●A85.13.134.572026-03-25 → 2026-03-25 · 3 obs

○ 2017-05-14 08:54:52
● 2026-03-25 07:06:36
● 2026-03-25 07:06:38

○A85.13.135.2432015-12-29 → 2015-12-29 · 4 obs

○ 2015-10-26 15:51:18
● 2015-12-29 02:39:06
○ 2016-03-28 15:12:50
○ 2026-03-25 07:06:38

○A85.13.136.42015-06-03 → 2015-10-26 · 4 obs

● 2015-06-03 13:12:40
● 2015-10-26 15:51:18
○ 2015-12-29 02:39:06
○ 2026-03-25 07:06:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
opensource-book.com	ns5.kasserver.com, ns6.kasserver.com	2 records

✅ Authoritative Response

Server:85.13.159.101

NS records: ns5.kasserver.com, ns6.kasserver.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for opensource-book.com (unsigned zone)

⏱️ Timing

Total: 273ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`85.13.134.57`
NS	2	`ns6.kasserver.com, ns5.kasserver.com`
MX	1	`w00b0c0c.kasserver.com (pri: 10)`
TXT	1	`v=spf1 a mx include:spf.kasserver.com ~a`
SOA	1	`ns5.kasserver.com hostmaster.kasserver.c`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns5.kasserver.com, ns6.kasserver.com)

Analysis

Hierarchy

opensource-book.com is the parent of mail.opensource-book.com.

IP Addresses

opensource-book.com resolves to a single IP address: 85.13.134.57.

Other host names including sdgsgermany.de, motion-lab.de, flf.eu, cellcoder.de and ad-arta.de share IP numbers with opensource-book.com.

Name Servers

opensource-book.com's delegation uses two name servers, ns5.kasserver.com and ns6.kasserver.com.

opensource-book.com shares the same name server setup as other domains, for example ratskeller-rheydt.de, xn--orthopdie-mnchnerfreiheit-qec76d.de, bockbrauerei.de, repanse.de and eigen-macht.de.

opensource-book.com at least partially shares name servers with other domains, including insti.de, a0ffa3.de, mandysabenteuerwelt.de, guteleudefabrik.de and goldmastering.de.

these name servers are commonly used with ns3.ai-dns.de, ns5.name-server-kas.de, a-dns-service.de and ns3.kas-dns-server.de.

Host names with a single IP:

ns5.kasserver.com points to 85.13.128.3.

ns6.kasserver.com points to 85.13.159.101.

Mail Servers

opensource-book.com is handled by a single mail server, w00b0c0c.kasserver.com.

w00b0c0c.kasserver.com points to a single IP: 85.13.134.57.

opensource-book.com - robtex.com