u-kellert.net - robtex.com
u-kellert.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 81.88.34.43🇩🇪 CLOUDPIT81.88.32.0/20 | ||||||
| PTR | host192.alfahosting-server.de | ||||||
| NS | cns1.alfahosting.info ⭐ | ||||||
| A | 2a01:64c0:0:5000::8🇩🇪 CLOUDPIT2a01:64c0::/32 | ||||||
| PTR | cns1.cloudpit.de | ||||||
| A | 109.237.142.8🇩🇪 CLOUDPIT109.237.128.0/20 | ||||||
| PTR | cns1.cloudpit.de | ||||||
| NS | cns2.alfahosting.info | ||||||
| A | 2a01:4f8:2b02:a88::105🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| PTR | cns2.cloudpit.com | ||||||
| A | 148.251.254.105🇩🇪 Hetzner148.251.0.0/16 HETZNER-RZ-BLK-ERX2 | ||||||
| PTR | cns2.cloudpit.com | ||||||
| NS | cns3.alfahosting.info | ||||||
| A | 2a02:2b80:101:5000::8🇩🇪 CLOUDPIT2a02:2b80:101::/48 | ||||||
| PTR | cns3.cloudpit.io | ||||||
| A | 109.237.143.8🇩🇪 CLOUDPIT109.237.128.0/20 | ||||||
| PTR | cns3.cloudpit.io | ||||||
| MX | mx03.secure-mailgate.com ⭐ | ||||||
| A | 46.243.88.174🇩🇪 CLOUDPIT46.243.88.0/21 | ||||||
| PTR | node03.secure-mailgate.com | ||||||
| A | 46.243.88.176🇩🇪 CLOUDPIT46.243.88.0/21 | ||||||
| PTR | node04.secure-mailgate.com | ||||||
| MX | mx04.secure-mailgate.com ⭐ | ||||||
| A | 46.243.88.175🇩🇪 CLOUDPIT46.243.88.0/21 | ||||||
| PTR | node03.secure-mailgate.com | ||||||
| A | 46.243.88.177🇩🇪 CLOUDPIT46.243.88.0/21 | ||||||
| PTR | node04.secure-mailgate.com | ||||||
| SOA | cns1.alfahosting.infohostmaster@alfahosting.de 2026-01-15 #1 | ||||||
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.netnstld@verisign-grs.com serial=1774624032 | ||||||
Subdomains
mail.u-kellert.net |
Same first word
u-kellert.net |
DNS History
8 records (6 active, 2 former)
●NScns1.alfahosting.info2015-08-07 → 2026-03-27 · 2 obs
● 2026-03-27 15:31:00
●NScns2.alfahosting.info2015-08-07 → 2026-03-27 · 2 obs
● 2026-03-27 15:31:00
●NScns3.alfahosting.info2015-08-07 → 2026-03-27 · 2 obs
● 2026-03-27 15:31:00
○MXmail.u-kellert.net2015-08-07 → 2017-04-09 · 4 obs
● 2017-04-09 08:45:20
○ 2026-02-14 17:47:10
○ 2026-03-27 15:31:00
●MXmx03.secure-mailgate.com2026-02-14 → 2026-03-27 · 3 obs
● 2026-02-14 17:47:10
● 2026-03-27 15:31:00
●MXmx04.secure-mailgate.com2026-02-14 → 2026-03-27 · 3 obs
● 2026-02-14 17:47:10
● 2026-03-27 15:31:00
○A109.237.140.142015-08-07 → 2017-04-09 · 4 obs
● 2017-04-09 08:45:20
○ 2026-02-14 17:47:10
○ 2026-03-27 15:31:00
●A81.88.34.432026-02-14 → 2026-03-27 · 3 obs
● 2026-02-14 17:47:10
● 2026-03-27 15:31:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| u-kellert.net | cns3.alfahosting.info, cns2.alfahosting.info, cns1.alfahosting.info | - |
✅ Authoritative Response
Server:109.237.142.8
NS records: cns3.alfahosting.info, cns2.alfahosting.info, cns1.alfahosting.info
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for u-kellert.net (unsigned zone)
⏱️ Timing
Total: 556ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 81.88.34.43 |
| NS | 3 | cns1.alfahosting.info, cns2.alfahosting.info... |
| MX | 2 | mx04.secure-mailgate.com (pri: 10), mx03.secure-mailgate.com (pri: 10) |
| SOA | 1 | cns1.alfahosting.info hostmaster.alfahos |
Analysis
Hierarchy
u-kellert.net is parent of mail.u-kellert.net.
IP Addresses
u-kellert.net points to a single IP: 81.88.34.43.
Other host names, for instance hanseatik.de, mail.raumfahrt.biz, mail1.hgears.com, mail.horizontal-bar.com and mail.wildeshauser.de share IP numbers with u-kellert.net.
Name Servers
u-kellert.net is delegated to three name servers: cns1.alfahosting.info, cns2.alfahosting.info and cns3.alfahosting.info.
u-kellert.net at least partially shares its name servers with other domains, for instance print-to.de, klavier-unterricht.de, infosystema.com, fechten-marburg.de and solamate.com.
Host names with two IP numbers:
cns1.alfahosting.info points to: 2a01:64c0:0:5000::8 and 109.237.142.8.
cns2.alfahosting.info points to: 2a01:4f8:2b02:a88::105 and 148.251.254.105.
cns3.alfahosting.info points to: 2a02:2b80:101:5000::8 and 109.237.143.8.
Mail Servers
Two mail servers mx03.secure-mailgate.com and mx04.secure-mailgate.com handle u-kellert.net.
u-kellert.net uses the same mail server setup as other domains such as physikjob.de, nwa4all.de, bacnumismatics.de, kliwo-service.de and colorcube.eu.
u-kellert.net shares some mail servers with other domains at least partially, for example a-recruiting.com.
Host names with two IP numbers: mx03.secure-mailgate.com points to 46.243.88.174 and 46.243.88.176; mx04.secure-mailgate.com points to 46.243.88.175 and 46.243.88.177