`app4teachers.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	217.160.0.91^{🇩🇪 IONOS-AS217.160.0.0/16 IONOS-PA-3}
NS	`shades04.rzone.de` ⭐
		A	2607:f1c0:fe:53:185:132:34:131^{🇺🇸 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	`shades04.rzone.de`
		A	185.132.34.131^{🇩🇪 IONOS-ANYCAST185.132.32.0/22 IONOS DNSAS (eBGP DNS)}
			PTR	`shades04.rzone.de`
NS	`docks02.rzone.de`
		A	2001:8d8:fe:53:5747:2a74:d:2^{🇩🇪 IONOS-AS2001:8d8:fe::/47 IONOS AS8560 anycast more specific}
			PTR	`docks02.rzone.de`
		A	217.160.80.129^{🇩🇪 IONOS-AS217.160.80.0/22 AS8560 anycast more specific}
			PTR	`docks02.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	`shades04.rzone.de`hostmaster@strato-rz.de 2020-06-11 #14

`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=1771291435

Same first word

app4teachers.com

DNS History

8 records (5 active, 3 former)

●NSdocks02.rzone.de2015-08-10 → 2026-03-23 · 2 obs

● 2015-08-10 01:29:24
● 2026-03-23 17:33:04

●NSshades04.rzone.de2015-08-10 → 2026-03-23 · 2 obs

● 2015-08-10 01:29:24
● 2026-03-23 17:33:04

○MXsmtp.rzone.de2015-08-10 → 2017-02-18 · 3 obs

● 2015-08-10 01:29:24
● 2017-02-18 22:21:56
○ 2026-03-23 17:33:04

●MXsmtpin.rzone.de2026-03-23 → 2026-03-23 · 2 obs

○ 2017-02-18 22:21:56
● 2026-03-23 17:33:04

●A2001:8d8:100f:f000::2002026-03-23 → 2026-03-23 · 2 obs

○ 2017-02-18 22:21:56
● 2026-03-23 17:33:04

●A217.160.0.912026-03-23 → 2026-03-23 · 2 obs

○ 2017-02-18 22:21:56
● 2026-03-23 17:33:04

○A2a01:238:20a:202:1088::2015-08-10 → 2017-02-18 · 3 obs

● 2015-08-10 01:29:24
● 2017-02-18 22:21:56
○ 2026-03-23 17:33:04

○A81.169.145.882015-08-10 → 2017-02-18 · 3 obs

● 2015-08-10 01:29:24
● 2017-02-18 22:21:56
○ 2026-03-23 17:33:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
app4teachers.com	docks02.rzone.de, shades04.rzone.de	-

✅ Authoritative Response

Server:185.132.34.131

NS records: docks02.rzone.de, shades04.rzone.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for app4teachers.com (unsigned zone)

⏱️ Timing

Total: 723ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`217.160.0.91`
AAAA	1	`2001:8d8:100f:f000::200`
NS	2	`docks02.rzone.de, shades04.rzone.de`
MX	1	`smtpin.rzone.de (pri: 5)`
SOA	1	`shades04.rzone.de hostmaster.strato-rz.d`

Analysis

IP Addresses

app4teachers.com points to two IP numbers: 2001:8d8:100f:f000::200 and 217.160.0.91.

Other host names, for instance polycool.co.uk, stampingground.de, tedatec.de, konformitaetsbescheinigung.de and adbubble.org share IP numbers with app4teachers.com.

Name Servers

app4teachers.com is delegated to two name servers: docks02.rzone.de and shades04.rzone.de.

app4teachers.com uses the same name server setup as other domains, for instance tomtec.solutions, bildner.de, slidernet.de, rpg-netz.de and red-mail.de.

app4teachers.com shares name servers with other domains at least partially, for instance aroshi.de, praxis-(0x6675636b)el.de, weiblen.net, lena6.com and griesinger-gmbh.de.

these name servers are commonly used with the name servers shades15.rzone.de, docks19.rzone.de, shades11.rzone.de, shades10.rzone.de, shades18.rzone.de, shades07.rzone.de, docks04.rzone.de, docks15.rzone.de, docks16.rzone.de and shades01.rzone.de.

Host names with two IP numbers:

The host docks02.rzone.de points to 2001:8d8:fe:53:5747:2a74:d:2 and 217.160.80.129.

The host shades04.rzone.de points to 2607:f1c0:fe:53:185:132:34:131 and 185.132.34.131.

Mail Servers

The mail server for app4teachers.com is smtpin.rzone.de.

app4teachers.com shares the same mail server setup as other domains, including mail.goldschmiede-detail.de, omnis360.com, merry.de, actsautomotive.de and galober.de.

Host name smtpin.rzone.de resolves to two IPs: 2a01:238:20a:202:50f0::1097 and 81.169.145.97.

app4teachers.com - robtex.com