sem4u.net - robtex.com

sem4u.net

DNSSEC⚠️ Not signed
A2a01:4f8:d0a:6552::2🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
PTRdedi5369.your-server.de
A159.69.224.62🇩🇪 Hetzner159.69.0.0/16 HETZNER-DC
NSns1.your-server.de ⭐
A2a01:4f8:0:1::5ddc:1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
PTRns1.your-server.de
A213.133.100.102🇩🇪 Hetzner213.133.96.0/19 HETZNER-RZ-NBG-BLK1
PTRns1.your-server.de
NSns.second-ns.com
A2a01:4f8:0:a101::b:1🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
PTRns.second-ns.com
A213.239.204.242🇩🇪 Hetzner213.239.192.0/18 HETZNER-RZ-NBG-BLK2
PTRns.second-ns.com
NSns3.second-ns.de
A2001:67c:192c::add:b3🇩🇪 NORIS-NETWORK2001:67c:192c::/48
PTRns3.second-ns.de
A193.47.99.4🇩🇪 NORIS-NETWORK193.47.99.0/24
PTRns3.second-ns.de
MXmail.sem4u.net ⭐
A2a01:4f8:d0a:6552::2🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK
PTRdedi5369.your-server.de
A159.69.224.62🇩🇪 Hetzner159.69.0.0/16 HETZNER-DC
PTRdedi5369.your-server.de
TXTv=spf1 +a +mx ?all
SOAns1.your-server.depostmaster@your-server.de 2026-01-08 #0

net

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1771291465

Subdomains

mail.sem4u.net

Same first word

sem4u.de
sem4u.com
sem4u.at
sem4u.net

Similar names

su4me.com
mse4u.com
4muse.com
4muse.ru
ems4u.de
muse4.com
us4me.com
ems4u.us
sme4u.com
ems4u.com

DNS History

12 records (6 active, 6 former)

2008201020122014201620182020202220242026NSns.second-ns.comns1.your-server.dens3.second-ns.dens13.schlund.dens14.schlund.deMXmail.sem4u.netmx00.schlund.demx01.schlund.deA159.69.224.622a01:4f8:d0a:6552::2217.160.231.13782.165.90.154
●NSns.second-ns.com2026-02-15 → 2026-03-22 · 3 obs
○ 2017-02-16 13:31:34
● 2026-02-15 08:43:08
● 2026-03-22 16:49:04
●NSns1.your-server.de2026-02-15 → 2026-03-22 · 3 obs
○ 2017-02-16 13:31:34
● 2026-02-15 08:43:08
● 2026-03-22 16:49:04
○NSns13.schlund.de2007-09-19 → 2017-02-16 · 4 obs
● 2007-09-19 00:02:14
● 2017-02-16 13:31:34
○ 2026-02-15 08:43:08
○ 2026-03-22 16:49:04
○NSns14.schlund.de2007-09-19 → 2017-02-16 · 4 obs
● 2007-09-19 00:02:14
● 2017-02-16 13:31:34
○ 2026-02-15 08:43:08
○ 2026-03-22 16:49:04
●NSns3.second-ns.de2026-02-15 → 2026-03-22 · 3 obs
○ 2017-02-16 13:31:34
● 2026-02-15 08:43:08
● 2026-03-22 16:49:04
●MXmail.sem4u.net2026-02-15 → 2026-03-22 · 3 obs
○ 2017-02-16 13:31:34
● 2026-02-15 08:43:08
● 2026-03-22 16:49:04
○MXmx00.schlund.de2007-09-19 → 2017-02-16 · 4 obs
● 2007-09-19 00:02:14
● 2017-02-16 13:31:34
○ 2026-02-15 08:43:08
○ 2026-03-22 16:49:04
○MXmx01.schlund.de2007-09-19 → 2017-02-16 · 4 obs
● 2007-09-19 00:02:14
● 2017-02-16 13:31:34
○ 2026-02-15 08:43:08
○ 2026-03-22 16:49:04
●A159.69.224.622026-02-15 → 2026-03-22 · 3 obs
○ 2017-02-16 13:31:34
● 2026-02-15 08:43:08
● 2026-03-22 16:49:04
○A217.160.231.1372016-06-27 → 2017-02-16 · 5 obs
○ 2016-03-19 01:11:48
● 2016-06-27 11:25:56
● 2017-02-16 13:31:34
○ 2026-02-15 08:43:08
○ 2026-03-22 16:49:04
●A2a01:4f8:d0a:6552::22026-02-15 → 2026-03-22 · 3 obs
○ 2017-02-16 13:31:34
● 2026-02-15 08:43:08
● 2026-03-22 16:49:04
○A82.165.90.1542007-09-19 → 2016-03-19 · 4 obs
● 2007-09-19 00:02:14
● 2016-03-19 01:11:48
○ 2016-06-27 11:25:56
○ 2026-03-22 16:49:04

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
neta.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
sem4u.netns1.your-server.de, ns.second-ns.com, ns3.second-ns.de-

✅ Authoritative Response

Server: 213.239.204.242

NS records: ns1.your-server.de, ns.second-ns.com, ns3.second-ns.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sem4u.net (unsigned zone)

⏱️ Timing

Total: 680ms | Queries: -

📄 Records

TypeCountSample Data
A1159.69.224.62
AAAA12a01:4f8:d0a:6552::2
NS3ns.second-ns.com, ns1.your-server.de...
MX1mail.sem4u.net (pri: 10)
TXT1v=spf1 +a +mx ?all
SOA1ns1.your-server.de postmaster.your-serve

Analysis

Hierarchy

mail.sem4u.net is a child of sem4u.net.

IP Addresses

sem4u.net has two IP numbers: 2a01:4f8:d0a:6552::2 and 159.69.224.62.

Other host names, for instance mail.heuser-koeln.de, www.karnevalsagentur.de, mail.sem4u.net, heuser-koeln.de and ela-n.de share IP numbers with sem4u.net.

Name Servers

sem4u.net is delegated to three name servers: ns.second-ns.com, ns3.second-ns.de and ns1.your-server.de.

sem4u.net at least partially shares name servers with other domains, including kinderaerzte-heumaden.de, colinyamada.de, satelli-line.de, 179.245.188.clients.your-server.de and 138.108.65.in-addr.arpa.

These name servers are commonly used with robotns3.second-ns.com, ns1.first-ns.de and robotns2.second-ns.de.

Host names with two IP numbers:

ns.second-ns.com: 2a01:4f8:0:a101::b:1 and 213.239.204.242

ns3.second-ns.de: 2001:67c:192c::add:b3 and 193.47.99.4

ns1.your-server.de: 2a01:4f8:0:1::5ddc:1 and 213.133.100.102

Mail Servers

A single mail server handles sem4u.net, mail.sem4u.net.

The host name mail.sem4u.net resolves to two IP numbers: 2a01:4f8:d0a:6552::2 and 159.69.224.62.