`rechnerdoktor.de`

DNSSEC	⚠️ Not signed
A	2a03:4000:61:5dda::19:1470^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
A	202.61.232.130^{🇩🇪 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	`mail.rechnerdoktor.de` ⭐
		A	202.61.232.132^{🇩🇪 netcup-AS202.61.232.0/24}
			PTR	`mxe884.netcup.net`
MX	`mxe884.netcup.net`⁽⁵⁰⁾
		A	2a03:4000:0:53b:1447:a6ff:fe00:f9a3^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
			PTR	`mxe884.netcup.net`
		A	202.61.232.132^{🇩🇪 netcup-AS202.61.232.0/24}
			PTR	`mxe884.netcup.net`
TXT	`v=spf1 mx a include:_spf.webhosting.systems ~all`
SOA	`root-dns.netcup.net`dnsadmin@netcup.net 2025-08-04 #18

`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=1776141864

Subdomains

mail.rechnerdoktor.de

Same first word

rechnerdoktor.de

DNS History

13 records (7 active, 6 former)

○NSns1-tec.de2015-06-28 → 2019-04-07 · 4 obs

● 2015-06-28 11:23:24
● 2019-04-07 04:37:32
○ 2026-03-05 19:45:30
○ 2026-04-14 05:02:02

○NSns2-tec.de2015-06-28 → 2019-04-07 · 4 obs

● 2015-06-28 11:23:24
● 2019-04-07 04:37:32
○ 2026-03-05 19:45:30
○ 2026-04-14 05:02:02

●NSroot-dns.netcup.net2026-03-05 → 2026-04-14 · 3 obs

○ 2019-04-07 04:37:32
● 2026-03-05 19:45:30
● 2026-04-14 05:02:02

●NSsecond-dns.netcup.net2026-03-05 → 2026-04-14 · 3 obs

○ 2019-04-07 04:37:32
● 2026-03-05 19:45:30
● 2026-04-14 05:02:02

●NSthird-dns.netcup.net2026-03-05 → 2026-04-14 · 3 obs

○ 2019-04-07 04:37:32
● 2026-03-05 19:45:30
● 2026-04-14 05:02:02

●MXmail.rechnerdoktor.de2026-03-05 → 2026-04-14 · 3 obs

○ 2019-04-07 04:37:32
● 2026-03-05 19:45:30
● 2026-04-14 05:02:02

○MXmx1.securemail.name2015-06-28 → 2019-04-07 · 4 obs

● 2015-06-28 11:23:24
● 2019-04-07 04:37:32
○ 2026-03-05 19:45:30
○ 2026-04-14 05:02:02

○MXmx2.securemail.name2015-06-28 → 2019-04-07 · 4 obs

● 2015-06-28 11:23:24
● 2019-04-07 04:37:32
○ 2026-03-05 19:45:30
○ 2026-04-14 05:02:02

●MXmxe884.netcup.net2026-03-05 → 2026-04-14 · 3 obs

○ 2019-04-07 04:37:32
● 2026-03-05 19:45:30
● 2026-04-14 05:02:02

○A176.9.19.2472015-06-28 → 2017-02-08 · 4 obs

● 2015-06-28 11:23:24
● 2017-02-08 06:05:56
○ 2019-04-07 04:37:32
○ 2026-04-14 05:02:02

●A202.61.232.1302026-03-05 → 2026-04-14 · 3 obs

○ 2019-04-07 04:37:32
● 2026-03-05 19:45:30
● 2026-04-14 05:02:02

●A2a03:4000:61:5dda::19:14702026-03-05 → 2026-04-14 · 3 obs

○ 2019-04-07 04:37:32
● 2026-03-05 19:45:30
● 2026-04-14 05:02:02

○A45.67.68.532019-04-07 → 2019-04-07 · 4 obs

○ 2017-02-08 06:05:56
● 2019-04-07 04:37:32
○ 2026-03-05 19:45:30
○ 2026-04-14 05:02:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, z.nic.de, f.nic.de	-
rechnerdoktor.de	second-dns.netcup.net, third-dns.netcup.net, root-dns.netcup.net	-

✅ Authoritative Response

Server:37.221.199.199

NS records: second-dns.netcup.net, third-dns.netcup.net, root-dns.netcup.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rechnerdoktor.de (unsigned zone)

⏱️ Timing

Total: 1170ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.61.232.130`
AAAA	1	`2a03:4000:61:5dda::19:1470`
NS	3	`root-dns.netcup.net, third-dns.netcup.net...`
MX	2	`mail.rechnerdoktor.de (pri: 10), mxe884.netcup.net (pri: 50)`
TXT	1	`v=spf1 mx a include:_spf.webhosting.syst`
SOA	1	`root-dns.netcup.net dnsadmin.netcup.net`

Analysis

Hierarchy

The parent of mail.rechnerdoktor.de is rechnerdoktor.de.

IP Addresses

rechnerdoktor.de points to two IP numbers: 2a03:4000:61:5dda::19:1470 and 202.61.232.130.

Other host names such as www.walthergmbh.de, stbz.de, heidi-gerstner.de, schluesseldienst-halle.de and schuh-brandt.de share IPs with rechnerdoktor.de.

Name Servers

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

rechnerdoktor.de at least partially shares name servers with other domains, for example lit(0x65726f746963)on.de, ambitz.de, 44h.de, hhn-racing.de and fashion-icon.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

Two mail servers handle rechnerdoktor.de: mail.rechnerdoktor.de and mxe884.netcup.net.

rechnerdoktor.de shares at least partially some mail servers with other domains, for instance itfuerkinder.de, andrefranca.com, fahrschule-hermanski.de, mail.okxo.de and kropshofer.at.

these mail servers are often used together with mail.itfuerkinder.de, mail.andrefranca.com and mail.fahrschule-hermanski.de.

Host names with two IPs:

mxe884.netcup.net resolves to 2a03:4000:0:53b:1447:a6ff:fe00:f9a3 and 202.61.232.132.

Host names with one IP:

mail.rechnerdoktor.de resolves to 202.61.232.132.

Hosts resolving to 202.61.232.132: mxe884.netcup.net and mail.rechnerdoktor.de.

rechnerdoktor.de - robtex.com