`rfc-professionals.de`

DNSSEC	⚠️ Not signed
A	2a03:4000:30:f16e::16:2928^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
A	202.61.232.43^{🇩🇪 netcup-AS202.61.232.0/24}
NS	`root-dns.netcup.net` ⭐
		A	2a03:4000:0:1::e1e1^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
			PTR	`root-dns.netcup.net`
		A	46.38.225.225^{🇩🇪 netcup-AS46.38.225.0/24}
			PTR	`root-dns.netcup.net`
NS	`second-dns.netcup.net`
		A	2a03:4000:2:24b::c7c7^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
			PTR	`second-dns.netcup.net`
		A	37.221.199.199^{🇩🇪 netcup-AS37.221.196.0/22}
			PTR	`second-dns.netcup.net`
NS	`third-dns.netcup.net`
		A	2a03:4001:0:106::3f44^{🇩🇪 netcup-AS2a03:4001::/32 NETCUP-GMBH}
			PTR	`third-dns.netcup.net`
		A	188.68.63.68^{🇩🇪 netcup-AS188.68.63.0/24 NETCUP-GMBH}
			PTR	`third-dns.netcup.net`
MX	`rfcprofessionals-de0i.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::1^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::7^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db4pr02cu00307.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::8^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db5pr02cu00100.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::1^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as9pr07cu00301.inbound.protection.outlook.com`
		A	52.101.68.0^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db3pr0202cu00100.inbound.protection.outlook.com`
		A	52.101.68.3^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00403.inbound.protection.outlook.com`
		A	52.101.68.39^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00607.inbound.protection.outlook.com`
		A	52.101.73.16^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-as2pr05cu00100.inbound.protection.outlook.com`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`root-dns.netcup.net`dnsadmin@netcup.net 2025-09-19 #8

`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=1776681924

Same first word

rfc-professionals.de

DNS History

11 records (6 active, 5 former)

○NSdocks17.rzone.de2015-07-03 → 2017-03-31 · 4 obs

● 2015-07-03 01:57:58
● 2017-03-31 09:17:06
○ 2026-03-03 22:09:10
○ 2026-04-20 11:00:02

●NSroot-dns.netcup.net2026-03-03 → 2026-04-20 · 3 obs

○ 2017-03-31 09:17:06
● 2026-03-03 22:09:10
● 2026-04-20 11:00:02

●NSsecond-dns.netcup.net2026-03-03 → 2026-04-20 · 3 obs

○ 2017-03-31 09:17:06
● 2026-03-03 22:09:10
● 2026-04-20 11:00:02

○NSshades19.rzone.de2015-07-03 → 2017-03-31 · 4 obs

● 2015-07-03 01:57:58
● 2017-03-31 09:17:06
○ 2026-03-03 22:09:10
○ 2026-04-20 11:00:02

●NSthird-dns.netcup.net2026-03-03 → 2026-04-20 · 3 obs

○ 2017-03-31 09:17:06
● 2026-03-03 22:09:10
● 2026-04-20 11:00:02

●MXrfcprofessionals-de0i.mail.protection.outlook.com2026-03-03 → 2026-04-20 · 3 obs

○ 2017-03-31 09:17:06
● 2026-03-03 22:09:10
● 2026-04-20 11:00:02

○MXsmtp.rzone.de2015-07-03 → 2017-03-31 · 4 obs

● 2015-07-03 01:57:58
● 2017-03-31 09:17:06
○ 2026-03-03 22:09:10
○ 2026-04-20 11:00:02

●A202.61.232.432026-03-03 → 2026-04-20 · 3 obs

○ 2017-03-31 09:17:06
● 2026-03-03 22:09:10
● 2026-04-20 11:00:02

○A2a01:238:20a:202:1162::2015-07-03 → 2017-03-31 · 4 obs

● 2015-07-03 01:57:58
● 2017-03-31 09:17:06
○ 2026-03-03 22:09:10
○ 2026-04-20 11:00:02

●A2a03:4000:30:f16e::16:29282026-03-03 → 2026-04-20 · 3 obs

○ 2017-03-31 09:17:06
● 2026-03-03 22:09:10
● 2026-04-20 11:00:02

○A81.169.145.1622015-07-03 → 2017-03-31 · 4 obs

● 2015-07-03 01:57:58
● 2017-03-31 09:17:06
○ 2026-03-03 22:09:10
○ 2026-04-20 11:00:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
rfc-professionals.de	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 rfc-professionals.de (unsigned zone)

⏱️ Timing

Total: 1115ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.61.232.43`
AAAA	1	`2a03:4000:30:f16e::16:2928`
NS	3	`second-dns.netcup.net, root-dns.netcup.net...`
MX	1	`rfcprofessionals-de0i.mail.protection.ou`
TXT	1	`v=spf1 include:spf.protection.outlook.co`
SOA	1	`root-dns.netcup.net dnsadmin.netcup.net`

Analysis

IP Addresses

Two IP numbers are pointed to by rfc-professionals.de: 2a03:4000:30:f16e::16:2928 and 202.61.232.43.

other host names include gawol.eu, mx0.scherms.de, hybrissolutions.com, et-services.de and postmaster.drk-zeitz.de; they share IP numbers with rfc-professionals.de.

Name Servers

rfc-professionals.de is delegated to three name servers root-dns.netcup.net, second-dns.netcup.net and third-dns.netcup.net.

rfc-professionals.de at least partially shares name servers with other domains, for instance industriemogul.de, enterpreiss.net, flyk3r.com, woelki.at and poessinger.de.

Host names with two IP numbers:

root-dns.netcup.net points to 2a03:4000:0:1::e1e1 and 46.38.225.225; second-dns.netcup.net points to 2a03:4000:2:24b::c7c7 and 37.221.199.199; third-dns.netcup.net points to 2a03:4001:0:106::3f44 and 188.68.63.68.

Mail Servers

rfc-professionals.de is handled by a single mail server, rfcprofessionals-de0i.mail.protection.outlook.com.

Hostname rfcprofessionals-de0i.mail.protection.outlook.com resolves to eight IP numbers: 2a01:111:f403:ca04::1, 2a01:111:f403:ca04::7, 2a01:111:f403:ca04::8, 2a01:111:f403:ca09::1, 52.101.68.0, 52.101.68.3, 52.101.68.39 and 52.101.73.16.

rfc-professionals.de - robtex.com