`realschule-osterode.de`

DNSSEC	⚠️ Not signed
A	81.88.34.25^{🇩🇪 CLOUDPIT81.88.32.0/20}
		PTR	`host196.alfahosting-server.de`
NS	`cns1.alfahosting.info` ⭐
		A	2a01:64c0:0:5000::8^{🇩🇪 CLOUDPIT2a01:64c0::/32}
			PTR	`cns1.cloudpit.de`
		A	109.237.142.8^{🇩🇪 CLOUDPIT109.237.128.0/20}
			PTR	`cns1.cloudpit.de`
NS	`cns2.alfahosting.info`
		A	2a01:4f8:2b02:a88::105^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
			PTR	`cns2.cloudpit.com`
		A	148.251.254.105^{🇩🇪 Hetzner148.251.0.0/16 HETZNER-RZ-BLK-ERX2}
			PTR	`cns2.cloudpit.com`
NS	`cns3.alfahosting.info`
		A	2a02:2b80:101:5000::8^{🇩🇪 CLOUDPIT2a02:2b80:101::/48}
			PTR	`cns3.cloudpit.io`
		A	109.237.143.8^{🇩🇪 CLOUDPIT109.237.128.0/20}
			PTR	`cns3.cloudpit.io`
MX	`mx03.secure-mailgate.com` ⭐
		A	46.243.88.174^{🇩🇪 CLOUDPIT46.243.88.0/21}
			PTR	`node03.secure-mailgate.com`
		A	46.243.88.176^{🇩🇪 CLOUDPIT46.243.88.0/21}
			PTR	`node04.secure-mailgate.com`
MX	`mx04.secure-mailgate.com` ⭐
		A	46.243.88.175^{🇩🇪 CLOUDPIT46.243.88.0/21}
			PTR	`node03.secure-mailgate.com`
		A	46.243.88.177^{🇩🇪 CLOUDPIT46.243.88.0/21}
			PTR	`node04.secure-mailgate.com`
SOA	`cns1.alfahosting.info`hostmaster@alfahosting.de 2026-03-02 #2

`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=1775940035

Subdomains

www.realschule-osterode.de

mail.realschule-osterode.de

Same first word

realschule-osterode.de

DNS History

8 records (6 active, 2 former)

●NScns1.alfahosting.info2015-07-22 → 2026-04-11 · 2 obs

● 2015-07-22 11:07:06
● 2026-04-11 20:50:00

●NScns2.alfahosting.info2015-07-22 → 2026-04-11 · 2 obs

● 2015-07-22 11:07:06
● 2026-04-11 20:50:00

●NScns3.alfahosting.info2015-07-22 → 2026-04-11 · 2 obs

● 2015-07-22 11:07:06
● 2026-04-11 20:50:00

○MXmail.realschule-osterode.de2015-07-22 → 2018-09-28 · 4 obs

● 2015-07-22 11:07:06
● 2018-09-28 09:12:30
○ 2026-03-08 13:12:34
○ 2026-04-11 20:50:00

●MXmx03.secure-mailgate.com2026-03-08 → 2026-04-11 · 3 obs

○ 2018-09-28 09:12:30
● 2026-03-08 13:12:34
● 2026-04-11 20:50:00

●MXmx04.secure-mailgate.com2026-03-08 → 2026-04-11 · 3 obs

○ 2018-09-28 09:12:30
● 2026-03-08 13:12:34
● 2026-04-11 20:50:00

○A109.237.132.242015-07-22 → 2018-09-28 · 4 obs

● 2015-07-22 11:07:06
● 2018-09-28 09:12:30
○ 2026-03-08 13:12:34
○ 2026-04-11 20:50:00

●A81.88.34.252026-03-08 → 2026-04-11 · 3 obs

○ 2018-09-28 09:12:30
● 2026-03-08 13:12:34
● 2026-04-11 20:50:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, z.nic.de, f.nic.de	-
realschule-osterode.de	cns2.alfahosting.info, cns1.alfahosting.info, cns3.alfahosting.info	-

✅ Authoritative Response

Server:109.237.143.8

NS records: cns2.alfahosting.info, cns1.alfahosting.info, cns3.alfahosting.info

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for realschule-osterode.de (unsigned zone)

⏱️ Timing

Total: 1560ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.88.34.25`
NS	3	`cns2.alfahosting.info, cns3.alfahosting.info...`
MX	2	`mx04.secure-mailgate.com (pri: 10), mx03.secure-mailgate.com (pri: 10)`
SOA	1	`cns1.alfahosting.info hostmaster.alfahos`

Analysis

Hierarchy

realschule-osterode.de is the parent of www.realschule-osterode.de and mail.realschule-osterode.de.

IP Addresses

realschule-osterode.de points to an IP address: 81.88.34.25.

other host names include feuerwehr-ploessberg.de, mail.blogwort.de, mail.blumen-hannweg.de, mail.mironchenko.com and mail.handicap-pension.eu; they share IP numbers with realschule-osterode.de.

Name Servers

realschule-osterode.de is delegated to three name servers cns1.alfahosting.info, cns2.alfahosting.info and cns3.alfahosting.info.

realschule-osterode.de at least partially shares name servers with other domains, for instance diereisedeineslebens.de, christern.net, feinstain.com, lc-officeconsulting.com and immo-markt.com.

Host names with two IP numbers:

cns1.alfahosting.info points to 2a01:64c0:0:5000::8 and 109.237.142.8; cns2.alfahosting.info points to 2a01:4f8:2b02:a88::105 and 148.251.254.105; cns3.alfahosting.info points to 2a02:2b80:101:5000::8 and 109.237.143.8.

Mail Servers

realschule-osterode.de is handled by two mail servers: mx03.secure-mailgate.com and mx04.secure-mailgate.com.

realschule-osterode.de uses the same mail server setup as other domains, for instance greenvalleygroup.eu, behexen.org, midsummer-triathlon.de, webressource.de and strgs.com.

Host names with two IP numbers:

mx03.secure-mailgate.com points to 46.243.88.174 and 46.243.88.176.

mx04.secure-mailgate.com points to 46.243.88.175 and 46.243.88.177.

realschule-osterode.de - robtex.com