docb.de - dns.ninja

`docb.de`

DNSSEC	⚠️ Not signed
NS	`karlsruhe.nic.xlink.net` ⭐
		A	192.166.192.43^{🇩🇪 CRONON-BERLIN-AS192.166.192.0/21 Cronon AG, Berlin}
			PTR	`vulthoom00.cronon.de`
NS	`chemnitz.nic.xlink.net`
		A	194.45.97.99^{🇩🇪 STRATO194.45.97.0/24 AG}
			PTR	`chemnitz.nic.xlink.net`
NS	`ulm.nic.xlink.net`
		A	193.141.3.6^{🇩🇪 STRATO193.141.3.0/24 AG}
			PTR	`ulm.nic.xlink.net`
TXT	`X-NIC Certified Quality Zone`
SOA	`karlsruhe.nic.xlink.net`de-domain@xlink.net 2024-11-19 #0

`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=1782641046

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DNS History

4 records (3 active, 1 former)

●NSchemnitz.nic.xlink.net2026-02-18 → 2026-06-28 · 2 obs

● 2026-02-18 20:21:14
● 2026-06-28 10:32:06

●NSkarlsruhe.nic.xlink.net2026-02-18 → 2026-06-28 · 2 obs

● 2026-02-18 20:21:14
● 2026-06-28 10:32:06

●NSulm.nic.xlink.net2026-02-18 → 2026-06-28 · 2 obs

● 2026-02-18 20:21:14
● 2026-06-28 10:32:06

○A81.169.145.952015-05-25 → 2017-03-19 · 4 obs

● 2015-05-25 06:41:42
● 2017-03-19 16:15:58
○ 2026-02-18 20:21:14
○ 2026-06-28 10:32:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	f.nic.de, a.nic.de, z.nic.de	-
docb.de	ulm.nic.xlink.net, chemnitz.nic.xlink.net	-

✅ Authoritative Response

Server:194.45.97.99

NS records: ulm.nic.xlink.net, chemnitz.nic.xlink.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for docb.de (unsigned zone)

⏱️ Timing

Total: 898ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ulm.nic.xlink.net, chemnitz.nic.xlink.net`
TXT	1	`X-NIC Certified Quality Zone`
SOA	1	`karlsruhe.nic.xlink.net de-domain.xlink.`

Analysis

Name Servers

docb.de has three name servers — chemnitz.nic.xlink.net, karlsruhe.nic.xlink.net and ulm.nic.xlink.net.

There is at least partial name server overlap between docb.de and other domains — tcop.de, tx5.de, iikb.net and two more among them.

Each of the three hostnames points to exactly one IP address: chemnitz.nic.xlink.net points to 194.45.97.99, karlsruhe.nic.xlink.net points to 192.166.192.43 and ulm.nic.xlink.net points to 193.141.3.6.