computercourse.de - dns.ninja

`computercourse.de`

DNSSEC	⚠️ Not signed
A	89.31.143.90^{🇩🇪 UDAG89.31.143.0/24}
NS	`ns.udag.de` ⭐
		A	2001:8d8:fe:53:217:160:80:253^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`ns.udag.de`
		A	217.160.80.253^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`ns.udag.de`
NS	`ns.udag.net`
		A	2607:f1c0:fe:53:185:132:33:253^{🇺🇸 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.udag.net`
		A	185.132.33.253^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns.udag.net`
NS	`ns.udag.org`
		A	2607:f1c0:fe:53:185:132:34:253^{🇺🇸 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.udag.org`
		A	185.132.34.253^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`ns.udag.org`
MX	`mx00.udag.de` ⭐
		A	62.146.106.39^{🇩🇪 IPX-AS1559862.146.104.0/22 NorthC Deutschland GmbH}
			PTR	`mx00.udag.de`
MX	`mx01.udag.de`⁽²⁰⁾
		A	62.146.106.40^{🇩🇪 IPX-AS1559862.146.104.0/22 NorthC Deutschland GmbH}
			PTR	`mx01.udag.de`
TXT	`v=spf1 include:_smtp.udag.de ~all`
SOA	`ns.udag.de`hostmaster@united-domains.de 2023-11-28 #3

`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=1783719080

Same first word

computercourse.co.uk

computercourse.it

computercourse.com.au

computercourse.org

computercourse.com

computercourse.co.za

computercourse.de

Similar names

computersource.com

computersource.net

sourcecomputer.com

computersource.ir

coursecomputer.com

DNS History

11 records (6 active, 5 former)

●NSns.udag.de2015-11-18 → 2026-07-10 · 3 obs

○ 2015-07-22 15:28:34
● 2015-11-18 17:22:40
● 2026-07-10 21:45:12

●NSns.udag.net2015-11-18 → 2026-07-10 · 3 obs

○ 2015-07-22 15:28:34
● 2015-11-18 17:22:40
● 2026-07-10 21:45:12

●NSns.udag.org2015-11-18 → 2026-07-10 · 3 obs

○ 2015-07-22 15:28:34
● 2015-11-18 17:22:40
● 2026-07-10 21:45:12

○NSns.udagdns.de2015-07-22 → 2015-07-22 · 3 obs

● 2015-07-22 15:28:34
○ 2015-11-18 17:22:40
○ 2026-07-10 21:45:12

○NSns.udagdns.net2015-07-22 → 2015-07-22 · 3 obs

● 2015-07-22 15:28:34
○ 2015-11-18 17:22:40
○ 2026-07-10 21:45:12

●MXmx00.udag.de2015-07-22 → 2026-07-10 · 2 obs

● 2015-07-22 15:28:34
● 2026-07-10 21:45:12

●MXmx01.udag.de2015-07-22 → 2026-07-10 · 2 obs

● 2015-07-22 15:28:34
● 2026-07-10 21:45:12

○A89.31.143.12020-03-29 → 2020-03-29 · 4 obs

○ 2017-02-12 23:34:32
● 2020-03-29 07:12:28
○ 2026-03-18 08:30:32
○ 2026-07-10 21:45:12

○A89.31.143.162015-11-18 → 2017-02-12 · 5 obs

○ 2015-07-22 15:28:34
● 2015-11-18 17:22:40
● 2017-02-12 23:34:32
○ 2020-03-29 07:12:28
○ 2026-07-10 21:45:12

○A89.31.143.32015-07-22 → 2015-07-22 · 3 obs

● 2015-07-22 15:28:34
○ 2015-11-18 17:22:40
○ 2026-07-10 21:45:12

●A89.31.143.902026-03-18 → 2026-07-10 · 3 obs

○ 2020-03-29 07:12:28
● 2026-03-18 08:30:32
● 2026-07-10 21:45:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
computercourse.de	ns.udag.de, ns.udag.org, ns.udag.net	2 records

✅ Authoritative Response

Server:217.160.80.253

NS records: ns.udag.de, ns.udag.org, ns.udag.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for computercourse.de (unsigned zone)

⏱️ Timing

Total: 2468ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`89.31.143.90`
NS	3	`ns.udag.net, ns.udag.org...`
MX	2	`mx00.udag.de (pri: 10), mx01.udag.de (pri: 20)`
TXT	1	`v=spf1 include:_smtp.udag.de ~all`
SOA	1	`ns.udag.de hostmaster.united-domains.de`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns.udag.de, ns.udag.de)

Analysis

IP Addresses

computercourse.de resolves to just one IP address, 89.31.143.90.

Two other host names, along with ooffices.org, revenue-engineering.com and zahnarzt-kraft.de, also share IP numbers with computercourse.de.

Name Servers

computercourse.de carries NS records delegating to ns.udag.de, ns.udag.net and ns.udag.org.

There is at least partial name server overlap between computercourse.de and other domains — provinzialcopilot.com, beruflich-durchstarten.de, kackfrosch.net and two more among them.

ns.udag.de, ns.udag.net and ns.udag.org are three hostnames that each resolve to a pair of IP addresses: ns.udag.de to 217.160.80.253 and 2001:8d8:fe:53:217:160:80:253, ns.udag.net to 185.132.33.253 and 2607:f1c0:fe:53:185:132:33:253, and ns.udag.org to 185.132.34.253 and 2607:f1c0:fe:53:185:132:34:253.

Mail Servers

computercourse.de is served by two mail servers, mx00.udag.de and mx01.udag.de.

Among the domains sharing a mail server setup with computercourse.de are leschi.nl, alpenkalk.info, grundstuecksverkauf.eu and two others.

mx00.udag.de → 62.146.106.39 and mx01.udag.de → 62.146.106.40: one IP number per host name.