`communications-concept.de`

DNSSEC	⚠️ Not signed
A	51.89.57.51^{🇬🇧 OVH51.89.0.0/16}
		PTR	`ip51.ip-51-89-57.eu`
NS	`ns1.3u.net` ⭐
		A	2a05:8e40:0:2::3:42^{🇩🇪 UUU-TELECOM-AS2a05:8e40::/29 3U Telecom}
		A	81.209.159.254^{🇩🇪 UUU-TELECOM-AS81.209.159.0/24}
			PTR	`ns1.3u.net`
NS	`ns2.3u.net`
		A	2a05:8e40:0:2::3:52^{🇩🇪 UUU-TELECOM-AS2a05:8e40::/29 3U Telecom}
		A	83.125.107.34^{🇩🇪 UUU-TELECOM-AS83.125.106.0/23 3U}
			PTR	`ns2.3u.net`
SOA	`ns1.3u.net`ops@3u.net 2023-09-26 #1

`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=1774571191

Subdomains

mail.communications-concept.de

Same first word

communications-concept.de

Similar names

communication-concepts.com

DNS History

16 records (3 active, 13 former)

●NSns1.3u.net2026-02-15 → 2026-03-27 · 3 obs

○ 2020-03-14 13:21:28
● 2026-02-15 20:51:04
● 2026-03-27 00:39:00

○NSns1.tbits.net2016-01-21 → 2020-03-14 · 5 obs

○ 2015-07-10 18:15:06
● 2016-01-21 03:54:06
● 2020-03-14 13:21:28
○ 2026-02-15 20:51:04
○ 2026-03-27 00:39:00

●NSns2.3u.net2026-02-15 → 2026-03-27 · 3 obs

○ 2020-03-14 13:21:28
● 2026-02-15 20:51:04
● 2026-03-27 00:39:00

○NSns2.tbits.net2016-01-21 → 2020-03-14 · 5 obs

○ 2015-07-10 18:15:06
● 2016-01-21 03:54:06
● 2020-03-14 13:21:28
○ 2026-02-15 20:51:04
○ 2026-03-27 00:39:00

○NSpns.dtag.de2015-07-10 → 2015-07-10 · 3 obs

● 2015-07-10 18:15:06
○ 2016-01-21 03:54:06
○ 2026-03-27 00:39:00

○NSsecondary000.dtag.net2015-07-10 → 2015-07-10 · 3 obs

● 2015-07-10 18:15:06
○ 2016-01-21 03:54:06
○ 2026-03-27 00:39:00

○MXmailgate01.tbits.net2020-03-14 → 2026-02-15 · 4 obs

○ 2017-01-03 00:47:12
● 2020-03-14 13:21:28
● 2026-02-15 20:51:04
○ 2026-03-27 00:39:00

○MXmailgate02.tbits.net2020-03-14 → 2026-02-15 · 4 obs

○ 2017-01-03 00:47:12
● 2020-03-14 13:21:28
● 2026-02-15 20:51:04
○ 2026-03-27 00:39:00

○MXmailgate03.tbits.net2020-03-14 → 2026-02-15 · 4 obs

○ 2017-01-03 00:47:12
● 2020-03-14 13:21:28
● 2026-02-15 20:51:04
○ 2026-03-27 00:39:00

○MXmxa.expurgate.de2015-07-10 → 2016-04-26 · 4 obs

● 2015-07-10 18:15:06
● 2016-04-26 15:07:24
○ 2017-01-03 00:47:12
○ 2026-03-27 00:39:00

○MXmxa.expurgate.net2015-07-10 → 2016-04-26 · 4 obs

● 2015-07-10 18:15:06
● 2016-04-26 15:07:24
○ 2017-01-03 00:47:12
○ 2026-03-27 00:39:00

○MXmxb.expurgate.de2015-07-10 → 2016-04-26 · 4 obs

● 2015-07-10 18:15:06
● 2016-04-26 15:07:24
○ 2017-01-03 00:47:12
○ 2026-03-27 00:39:00

○MXmxb.expurgate.net2015-07-10 → 2016-04-26 · 4 obs

● 2015-07-10 18:15:06
● 2016-04-26 15:07:24
○ 2017-01-03 00:47:12
○ 2026-03-27 00:39:00

○MXmxtls.expurgate.net2017-01-03 → 2017-01-03 · 4 obs

○ 2016-04-26 15:07:24
● 2017-01-03 00:47:12
○ 2020-03-14 13:21:28
○ 2026-03-27 00:39:00

○A178.250.224.252016-01-21 → 2020-03-14 · 4 obs

● 2016-01-21 03:54:06
● 2020-03-14 13:21:28
○ 2026-02-15 20:51:04
○ 2026-03-27 00:39:00

●A51.89.57.512026-02-15 → 2026-03-27 · 3 obs

○ 2020-03-14 13:21:28
● 2026-02-15 20:51:04
● 2026-03-27 00:39:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
de	a.nic.de, f.nic.de, z.nic.de	-
communications-concept.de	ns2.3u.net, ns1.3u.net	-

✅ Authoritative Response

Server:81.209.159.254

NS records: ns2.3u.net, ns1.3u.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for communications-concept.de (unsigned zone)

⏱️ Timing

Total: 1186ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`51.89.57.51`
NS	2	`ns1.3u.net, ns2.3u.net`
SOA	1	`ns1.3u.net ops.3u.net`

Analysis

Hierarchy

mail.communications-concept.de has communications-concept.de as its parent.

IP Addresses

communications-concept.de maps to IP address 51.89.57.51.

Other host names, for example, mail.communications-concept.de share IP numbers with communications-concept.de.

Name Servers

Two name servers ns1.3u.net and ns2.3u.net are delegated to communications-concept.de.

communications-concept.de uses the same name server configuration as other domains, such as 01086.com, selfio.tv, citrus-tel.de, 151.209.81.in-addr.arpa and 3u-energy.de.

Host names with two IPs:

ns1.3u.net points to 2a05:8e40:0:2::3:42 and 81.209.159.254.

ns2.3u.net points to 2a05:8e40:0:2::3:52 and 83.125.107.34.

communications-concept.de - robtex.com