`teaching-tools.de`

DNSSEC	⚠️ Not signed
A	2a01:4f8:c17:c19c::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
		PTR	`cs3.web-redirect.eu`
A	2a01:4f8:c2c:abf5::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
A	2a01:4f8:c010:3f9c::1^{🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK}
A	116.202.9.166^{🇩🇪 Hetzner116.202.0.0/16 HETZNER-DC}
A	116.202.21.136^{🇩🇪 Hetzner116.202.0.0/16 HETZNER-DC}
A	116.203.213.72^{🇩🇪 Hetzner116.203.0.0/16 HETZNER-DC}
NS	`ns1.domainoffensive.de` ⭐
		A	2001:67c:1bc::21^{🇦🇹 RCODEZERO-ANYCAST-SEC1-TLD2001:67c:1bc::/48 IPCom-NET Anycast}
			PTR	`ns1.mainns.de`
		A	192.174.68.21^{🇦🇹 RCODEZERO-ANYCAST-SEC1-TLD192.174.68.0/24 NICat-anycast-net}
			PTR	`ns1.mainns.de`
NS	`ns2.domainoffensive.eu`
		A	2001:67c:10b8::21^{🇨🇭 RCODEZERO-ANYCAST-SEC22001:67c:10b8::/48 IPCOM-anycast-net}
			PTR	`ns2.mainns.eu`
		A	176.97.158.21^{🇦🇹 RCODEZERO-ANYCAST-SEC2176.97.158.0/24 NICat-anycast-net}
NS	`ns3.domainoffensive.net`
		A	2001:67c:1bc::20^{RCODEZERO-ANYCAST-SEC1-TLD2001:67c:1bc::/48 IPCom-NET Anycast}
		A	192.174.68.20^{RCODEZERO-ANYCAST-SEC1-TLD192.174.68.0/24 NICat-anycast-net}
TXT	`v=spf1 -all`
SOA	`ns1.domainoffensive.de`info@domains.resellerinterface.de serial=1771863700

`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=1777109800

Same first word

teaching-tools.de

DNS History

15 records (9 active, 6 former)

○NSans0.ewetel.de2015-04-18 → 2017-07-04 · 4 obs

● 2015-04-18 09:13:52
● 2017-07-04 02:41:50
○ 2026-03-27 03:02:48
○ 2026-04-25 09:47:26

○NSans1.ewetel.net2015-04-18 → 2017-07-04 · 4 obs

● 2015-04-18 09:13:52
● 2017-07-04 02:41:50
○ 2026-03-27 03:02:48
○ 2026-04-25 09:47:26

○NSans2.ewetel.de2015-04-18 → 2017-07-04 · 4 obs

● 2015-04-18 09:13:52
● 2017-07-04 02:41:50
○ 2026-03-27 03:02:48
○ 2026-04-25 09:47:26

○NSans3.ewetel.net2015-04-18 → 2017-07-04 · 4 obs

● 2015-04-18 09:13:52
● 2017-07-04 02:41:50
○ 2026-03-27 03:02:48
○ 2026-04-25 09:47:26

●NSns1.domainoffensive.de2026-03-27 → 2026-04-25 · 3 obs

○ 2017-07-04 02:41:50
● 2026-03-27 03:02:48
● 2026-04-25 09:47:26

●NSns2.domainoffensive.eu2026-03-27 → 2026-04-25 · 3 obs

○ 2017-07-04 02:41:50
● 2026-03-27 03:02:48
● 2026-04-25 09:47:26

●NSns3.domainoffensive.net2026-03-27 → 2026-04-25 · 3 obs

○ 2017-07-04 02:41:50
● 2026-03-27 03:02:48
● 2026-04-25 09:47:26

○MXmx-x0.ewetel.de2015-04-18 → 2017-07-04 · 4 obs

● 2015-04-18 09:13:52
● 2017-07-04 02:41:50
○ 2026-03-27 03:02:48
○ 2026-04-25 09:47:26

●A116.202.21.1362026-03-27 → 2026-04-25 · 3 obs

○ 2017-07-04 02:41:50
● 2026-03-27 03:02:48
● 2026-04-25 09:47:26

●A116.202.9.1662026-03-27 → 2026-04-25 · 3 obs

○ 2017-07-04 02:41:50
● 2026-03-27 03:02:48
● 2026-04-25 09:47:26

●A116.203.213.722026-03-27 → 2026-04-25 · 3 obs

○ 2017-07-04 02:41:50
● 2026-03-27 03:02:48
● 2026-04-25 09:47:26

○A212.6.65.2082015-04-18 → 2017-07-04 · 4 obs

● 2015-04-18 09:13:52
● 2017-07-04 02:41:50
○ 2026-03-27 03:02:48
○ 2026-04-25 09:47:26

●A2a01:4f8:c010:3f9c::12026-03-27 → 2026-04-25 · 3 obs

○ 2017-07-04 02:41:50
● 2026-03-27 03:02:48
● 2026-04-25 09:47:26

●A2a01:4f8:c17:c19c::12026-03-27 → 2026-04-25 · 3 obs

○ 2017-07-04 02:41:50
● 2026-03-27 03:02:48
● 2026-04-25 09:47:26

●A2a01:4f8:c2c:abf5::12026-03-27 → 2026-04-25 · 3 obs

○ 2017-07-04 02:41:50
● 2026-03-27 03:02:48
● 2026-04-25 09:47:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	z.nic.de, a.nic.de, f.nic.de	-
teaching-tools.de	ns1.domainoffensive.de, ns2.domainoffensive.eu, ns3.domainoffensive.net	-

✅ Authoritative Response

Server:192.174.68.20

NS records: ns1.domainoffensive.de, ns2.domainoffensive.eu, ns3.domainoffensive.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for teaching-tools.de (unsigned zone)

⏱️ Timing

Total: 1912ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`116.202.9.166, 116.202.21.136...`
AAAA	3	`2a01:4f8:c17:c19c::1, 2a01:4f8:c2c:abf5::1...`
NS	3	`ns1.domainoffensive.de, ns2.domainoffensive.eu...`
MX	1	`. (pri: 10)`
TXT	1	`v=spf1 -all`
SOA	1	`ns1.domainoffensive.de info.domains.rese`

Analysis

IP Addresses

teaching-tools.de points to six IP addresses: 2a01:4f8:c17:c19c::1, 2a01:4f8:c2c:abf5::1, 2a01:4f8:c010:3f9c::1, 116.202.9.166, 116.202.21.136 and 116.203.213.72.

For instance, other host names mx50.sichtschutzbalkon.de, (0x706f726e)orado.de, www.bfnt-goettingen.de, live(0x736578)film.de and mail.reifsein.com share IP numbers with teaching-tools.de.

Name Servers

The delegation for teaching-tools.de is handled by three name servers: ns1.domainoffensive.de, ns2.domainoffensive.eu and ns3.domainoffensive.net.

teaching-tools.de shares name servers with other domains at least partially, for example bp-fahrzeugteile.de, ilove2.de, goerzel.eu, s-karton.de and szeiss.com.

These name servers are commonly used with the name servers ns2.domainoffensive.de and ns3.domainoffensive.de.

Host names with two IPs:

ns1.domainoffensive.de points to 2001:67c:1bc::21 and 192.174.68.21

ns2.domainoffensive.eu points to 2001:67c:10b8::21 and 176.97.158.21

ns3.domainoffensive.net points to 2001:67c:1bc::20 and 192.174.68.20

teaching-tools.de - robtex.com