`immowerker.net`

DNSSEC	⚠️ Not signed
A	81.209.151.19^{🇩🇪 UUU-TELECOM-AS81.209.151.0/24}
NS	`ns1.3u.net` ⭐
		A	2a05:8e40:0:2::3:42^{🇩🇪 UUU-TELECOM-AS2a05:8e40::/29 3U Telecom}
		A	81.209.151.254^{🇩🇪 UUU-TELECOM-AS81.209.151.0/24}
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`
MX	`smtp.3u.net` ⭐
		A	81.209.151.4^{🇩🇪 UUU-TELECOM-AS81.209.151.0/24}
			PTR	`smtp.3u.net`
SOA	`ns1.3u.net`ops@3u.net 2016-06-08 #2

`net`

	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=1778434531

Same first word

immowerker.net

immowerker.com

immowerker.de

DNS History

6 records (4 active, 2 former)

○NSns-cust1.de.lambdanet.net2015-04-06 → 2015-04-06 · 3 obs

● 2015-04-06 05:21:18
○ 2015-10-12 06:06:04
○ 2026-05-10 17:46:12

●NSns1.3u.net2015-04-06 → 2026-05-10 · 2 obs

● 2015-04-06 05:21:18
● 2026-05-10 17:46:12

●NSns2.3u.net2015-10-12 → 2026-05-10 · 3 obs

○ 2015-04-06 05:21:18
● 2015-10-12 06:06:04
● 2026-05-10 17:46:12

●MXsmtp.3u.net2015-04-06 → 2026-05-10 · 2 obs

● 2015-04-06 05:21:18
● 2026-05-10 17:46:12

●A81.209.151.192016-07-22 → 2026-05-10 · 3 obs

○ 2016-03-26 16:26:04
● 2016-07-22 23:47:46
● 2026-05-10 17:46:12

○A81.209.159.142015-04-06 → 2016-03-26 · 4 obs

● 2015-04-06 05:21:18
● 2016-03-26 16:26:04
○ 2016-07-22 23:47:46
○ 2026-05-10 17:46:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
net	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
immowerker.net	ns1.3u.net, ns2.3u.net	2 records

✅ Authoritative Response

Server:83.125.107.34

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for immowerker.net (unsigned zone)

⏱️ Timing

Total: 272ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`81.209.151.19`
NS	2	`ns2.3u.net, ns1.3u.net`
MX	1	`smtp.3u.net (pri: 100)`
SOA	1	`ns1.3u.net ops.3u.net`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.3u.net, ns2.3u.net)

Analysis

IP Addresses

immowerker.net points to a single IP: 81.209.151.19.

Other host names, for instance immowerker.com, 3umobile.de, immowerker.de, 01086.com and exacor.de share IP numbers with immowerker.net.

Name Servers

Two name servers ns1.3u.net and ns2.3u.net handle delegation for immowerker.net.

immowerker.net uses the same name server setup as other domains, for example pelia.de, 3uenergy.com, 3u-dcs.de, fon4u.de and 106.125.83.in-addr.arpa.

Host names with two IP numbers:

ns1.3u.net points to: 2a05:8e40:0:2::3:42 and 81.209.151.254

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

Mail Servers

immowerker.net is handled by a single mail server, smtp.3u.net.

immowerker.net has the same mail server setup as other domains, including 3u-energy-pe.de, immowerker.com, 3uenergy.net, selfio-gmbh.de and pelia.ch.

smtp.3u.net points to a single IP: 81.209.151.4.

immowerker.net - robtex.com

immowerker.net

net