`kolb-group.de`

DNSSEC	⚠️ Not signed
A	188.40.3.143^{🇩🇪 Hetzner188.40.0.0/16 HETZNER-RZ-FKS-BLK1}
		PTR	`dedi2243.your-server.de`
NS	`nsa2.schlundtech.de` ⭐
		A	2607:f1c0:fe:53:185:132:34:227^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns-stec.ui-dns.com`
		A	185.132.34.227^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns-stec.ui-dns.com`
NS	`nsb2.schlundtech.de`
		A	2607:f1c0:fe:53:185:132:35:227^{🇺🇸 IONOS-ANYCAST2607:f1c0:fe::/47 AS8560 global anycast services (more specific) 1&1 IONOS Inc. 701 Lee Rd, Suite 300 Chesterbrook, PA 19087 US}
			PTR	`ns-stec.ui-dns.org`
		A	185.132.35.227^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns-stec.ui-dns.org`
NS	`nsc2.schlundtech.de`
		A	2001:8d8:fe:53:217:160:80:227^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns-stec.ui-dns.de`
		A	217.160.80.227^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns-stec.ui-dns.de`
NS	`nsd2.schlundtech.de`
		A	2001:8d8:fe:53:217:160:81:227^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns-stec.ui-dns.biz`
		A	217.160.81.227^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns-stec.ui-dns.biz`
MX	`mx01.hornetsecurity.com` ⭐
		A	94.100.132.8^{🇩🇪 MK-NETZDIENSTE-AS94.100.132.0/23 ANTISPAMEUROPE-NET via AS25394}
			PTR	`mx01.hornetsecurity.com`
MX	`mx02.hornetsecurity.com`⁽²⁰⁾
		A	94.100.136.8^{🇩🇪 SSERV-AS94.100.136.0/23 ANTISPAMEUROPE via as24679.net}
			PTR	`mx02.hornetsecurity.com`
MX	`mx03.hornetsecurity.com`⁽³⁰⁾
		A	94.100.134.8^{🇩🇪 NCORE-AS94.100.134.0/24 antispameurope GmbH via as12676}
			PTR	`mx03.hornetsecurity.com`
MX	`mx04.hornetsecurity.com`⁽⁴⁰⁾
		A	94.100.136.7^{🇩🇪 SSERV-AS94.100.136.0/23 ANTISPAMEUROPE via as24679.net}
			PTR	`mx04.hornetsecurity.com`
TXT	`v=spf1 include:spf.hornetsecurity.com include:spf.protection.outlook.com ip4:...`
TXT	`MS=ms90373141`
SOA	`nsa2.schlundtech.de`team-admin@ksk-agentur.de 2025-03-07 #1

`de`

	DNSSEC	🔒 Signed (DS record present)
	NS	`f.nic.de` ⭐
	NS	`a.nic.de`
	NS	`l.de.net` ⚠️ Not in parent delegation
	NS	`n.de.net` ⚠️ Not in parent delegation
	NS	`s.de.net` ⚠️ Not in parent delegation
	NS	`z.nic.de`
	SOA	`f.nic.de`dns-operations@denic.de serial=1777225373

Subdomains

mail.kolb-group.de

mx02.kolb-group.de

remote.kolb-group.de

mx01.kolb-group.de

Same first word

kolb-group.de

DNS History

13 records (9 active, 4 former)

●NSnsa2.schlundtech.de2015-07-04 → 2026-04-26 · 2 obs

● 2015-07-04 18:38:06
● 2026-04-26 17:55:34

●NSnsb2.schlundtech.de2015-07-04 → 2026-04-26 · 2 obs

● 2015-07-04 18:38:06
● 2026-04-26 17:55:34

●NSnsc2.schlundtech.de2015-07-04 → 2026-04-26 · 2 obs

● 2015-07-04 18:38:06
● 2026-04-26 17:55:34

●NSnsd2.schlundtech.de2015-07-04 → 2026-04-26 · 2 obs

● 2015-07-04 18:38:06
● 2026-04-26 17:55:34

○MXmail.dedi2243.your-server.de2015-07-04 → 2016-03-03 · 4 obs

● 2015-07-04 18:38:06
● 2016-03-03 09:14:24
○ 2016-07-17 19:08:12
○ 2026-04-26 17:55:34

●MXmx01.hornetsecurity.com2026-03-01 → 2026-04-26 · 3 obs

○ 2020-03-22 00:23:58
● 2026-03-01 08:07:26
● 2026-04-26 17:55:34

○MXmx01.kolb-group.de2016-07-17 → 2020-03-22 · 5 obs

○ 2016-03-03 09:14:24
● 2016-07-17 19:08:12
● 2020-03-22 00:23:58
○ 2026-03-01 08:07:26
○ 2026-04-26 17:55:34

●MXmx02.hornetsecurity.com2026-03-01 → 2026-04-26 · 3 obs

○ 2020-03-22 00:23:58
● 2026-03-01 08:07:26
● 2026-04-26 17:55:34

○MXmx02.kolb-group.de2016-07-17 → 2020-03-22 · 5 obs

○ 2016-03-03 09:14:24
● 2016-07-17 19:08:12
● 2020-03-22 00:23:58
○ 2026-03-01 08:07:26
○ 2026-04-26 17:55:34

●MXmx03.hornetsecurity.com2026-03-01 → 2026-04-26 · 3 obs

○ 2020-03-22 00:23:58
● 2026-03-01 08:07:26
● 2026-04-26 17:55:34

●MXmx04.hornetsecurity.com2026-03-01 → 2026-04-26 · 3 obs

○ 2020-03-22 00:23:58
● 2026-03-01 08:07:26
● 2026-04-26 17:55:34

○MXremote.kolb-group.de2016-07-17 → 2020-03-22 · 5 obs

○ 2016-03-03 09:14:24
● 2016-07-17 19:08:12
● 2020-03-22 00:23:58
○ 2026-03-01 08:07:26
○ 2026-04-26 17:55:34

●A188.40.3.1432015-07-04 → 2026-04-26 · 2 obs

● 2015-07-04 18:38:06
● 2026-04-26 17:55:34

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
kolb-group.de	nsc2.schlundtech.de, nsd2.schlundtech.de, nsa2.schlundtech.de, nsb2.schlundtech.de	-

✅ Authoritative Response

Server:217.160.80.227

NS records: nsc2.schlundtech.de, nsd2.schlundtech.de, nsa2.schlundtech.de, nsb2.schlundtech.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for kolb-group.de (unsigned zone)

⏱️ Timing

Total: 1188ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`188.40.3.143`
NS	4	`nsb2.schlundtech.de, nsa2.schlundtech.de...`
MX	4	`mx02.hornetsecurity.com (pri: 20), mx01.hornetsecurity.com (pri: 10)...`
TXT	2	`v=spf1 include:spf.hornetsecurity.com in, MS=ms90373141`
SOA	1	`nsa2.schlundtech.de team-admin.ksk-agent`

Analysis

Hierarchy

kolb-group.de is a parent of mail.kolb-group.de, mx02.kolb-group.de, remote.kolb-group.de and mx01.kolb-group.de.

IP Addresses

kolb-group.de points to a single IP number: 188.40.3.143.

Other host names, for instance mail.dedi2243.your-server.de, hotel-langeoog.de, hotel-moi-utkiek.com, retrodesign-hotel.de and dedi2243.your-server.de share IP numbers with kolb-group.de.

Name Servers

kolb-group.de is delegated to four name servers: nsa2.schlundtech.de, nsb2.schlundtech.de, nsc2.schlundtech.de and nsd2.schlundtech.de.

kolb-group.de at least partially shares name servers with other domains, for instance bianca-klaus.de, radmann.de, gdp-olpe.de, horseshape.net and zge.de.

Host names with two IP numbers:

nsa2.schlundtech.de points to: 2607:f1c0:fe:53:185:132:34:227 and 185.132.34.227.

nsb2.schlundtech.de points to: 2607:f1c0:fe:53:185:132:35:227 and 185.132.35.227.

nsc2.schlundtech.de points to: 2001:8d8:fe:53:217:160:80:227 and 217.160.80.227.

nsd2.schlundtech.de points to: 2001:8d8:fe:53:217:160:81:227 and 217.160.81.227.

Mail Servers

kolb-group.de is handled by four mail servers: mx01.hornetsecurity.com, mx02.hornetsecurity.com, mx03.hornetsecurity.com and mx04.hornetsecurity.com.

kolb-group.de shares mail servers with other domains at least in part, for instance hofbraeuhaus.com, mocotel.de, migrare.at, rmsales.net and proseat.eu.

Host names with a single IP address

mx01.hornetsecurity.com points to 94.100.132.8

mx02.hornetsecurity.com points to 94.100.136.8

mx03.hornetsecurity.com points to 94.100.134.8

mx04.hornetsecurity.com points to 94.100.136.7

kolb-group.de - robtex.com

kolb-group.de

de

Subdomains

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`kolb-group.de`

`de`