`it-masterclass.com`

DNSSEC	⚠️ Not signed
A	2001:8d8:100f:f000::200^{🇩🇪 IONOS-AS2001:8d8::/32 DE-IONOS-20020910}
		PTR	`2001-08d8-100f-f000-0000-0000-0000-0200.elastic-ssl.ui-r.com`
A	217.160.0.224^{🇩🇪 IONOS-AS217.160.0.0/16 IONOS-PA-3}
NS	`docks16.rzone.de` ⭐
		A	2001:8d8:fe:53:5747:2a74:d:16^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`docks16.rzone.de`
		A	217.160.80.143^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`docks16.rzone.de`
NS	`shades14.rzone.de`
		A	2607:f1c0:fe:53:185:132:34:141^{🇺🇸 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	`shades14.rzone.de`
		A	185.132.34.141^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`shades14.rzone.de`
MX	`smtpin.rzone.de` ⭐
		A	2a01:238:20a:202:50f0::1097^{🇩🇪 STRATO2a01:238:20a::/48 Strato AG}
			PTR	`smtpin.rzone.de`
		A	81.169.145.97^{🇩🇪 STRATO81.169.144.0/22 AG}
			PTR	`smtpin.rzone.de`
SOA	`docks16.rzone.de`hostmaster@strato-rz.de 2020-07-11 #7

`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=1774535142

Same first word

it-masterclass.com

DNS History

5 records (5 active, 0 former)

●NSdocks16.rzone.de2026-02-17 → 2026-03-26 · 2 obs

● 2026-02-17 11:13:40
● 2026-03-26 14:35:32

●NSshades14.rzone.de2026-02-17 → 2026-03-26 · 2 obs

● 2026-02-17 11:13:40
● 2026-03-26 14:35:32

●MXsmtpin.rzone.de2026-02-17 → 2026-03-26 · 2 obs

● 2026-02-17 11:13:40
● 2026-03-26 14:35:32

●A2001:8d8:100f:f000::2002026-02-17 → 2026-03-26 · 2 obs

● 2026-02-17 11:13:40
● 2026-03-26 14:35:32

●A217.160.0.2242026-02-17 → 2026-03-26 · 2 obs

● 2026-02-17 11:13:40
● 2026-03-26 14:35:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
it-masterclass.com	shades14.rzone.de, docks16.rzone.de	-

✅ Authoritative Response

Server:185.132.34.141

NS records: shades14.rzone.de, docks16.rzone.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for it-masterclass.com (unsigned zone)

⏱️ Timing

Total: 750ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`217.160.0.224`
AAAA	1	`2001:8d8:100f:f000::200`
NS	2	`shades14.rzone.de, docks16.rzone.de`
MX	1	`smtpin.rzone.de (pri: 5)`
SOA	1	`docks16.rzone.de hostmaster.strato-rz.de`

Analysis

IP Addresses

it-masterclass.com points to two IP numbers: 2001:8d8:100f:f000::200 and 217.160.0.224.

Other host names such as www.purecompanies.co.uk, akman.net, ramonpeters.de, first-tools.de and cuxhavener-services.de share IPs with it-masterclass.com.

Name Servers

Two name servers docks16.rzone.de and shades14.rzone.de handle the delegation for it-masterclass.com.

it-masterclass.com shares the same name server setup as other domains, for example pipage.de, all-write.de, damacon.de, heinrich-kern.de and pibgmbh.com.

it-masterclass.com at least partially shares name servers with other domains, for example jensklare.de, elegant.world, 2radschleussinger.de, bewegen-macht-gluecklich.de and mented.net.

these name servers are commonly used with the following name servers: docks13.rzone.de, shades05.rzone.de, shades03.rzone.de, docks11.rzone.de, docks19.rzone.de, docks10.rzone.de, docks18.rzone.de, shades01.rzone.de, shades06.rzone.de and docks17.rzone.de.

Host names with two IP numbers:

docks16.rzone.de points to 2001:8d8:fe:53:5747:2a74:d:16 and 217.160.80.143.

shades14.rzone.de points to 2607:f1c0:fe:53:185:132:34:141 and 185.132.34.141.

Mail Servers

The smtpin.rzone.de mail server handles it-masterclass.com.

it-masterclass.com shares the same mail server setup as other domains, including homeomundi.de, bauch-am-see.de, vlife.de, mail.verwaltivo.de and lenzwallduern.de.

smtpin.rzone.de points to two IP numbers: 2a01:238:20a:202:50f0::1097 and 81.169.145.97.

it-masterclass.com - robtex.com