dot21.net - robtex.com
dot21.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 116.202.121.135🇩🇪 Hetzner116.202.0.0/16 HETZNER-DC | ||||||
| PTR | server12.febas.net | ||||||
| NS | ns2.checkdomain.de ⭐ | ||||||
| A | 2a01:4f8:2b02:a88::106🇩🇪 Hetzner2a01:4f8::/32 HETZNER-IPv6-BLK | ||||||
| PTR | ns2.checkdomain.de | ||||||
| A | 5.9.190.98🇩🇪 Hetzner5.9.0.0/16 HETZNER-RZ-FKS-BLK5 | ||||||
| PTR | ns2.checkdomain.de | ||||||
| NS | ns.checkdomain.de | ||||||
| A | 2a02:2b80:101:5000::9🇩🇪 CLOUDPIT2a02:2b80:101::/48 | ||||||
| A | 109.237.143.11🇩🇪 CLOUDPIT109.237.128.0/20 | ||||||
| PTR | ns1.checkdomain.de | ||||||
| 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(20) | ||||||
| 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 | ||||||
| TXT | v=spf1 include:secure-mailgate.com ?all | ||||||
| TXT | google-site-verification=XnDr2T6MI2UpYdfmDVedUyPeSxSN4GynV_j0I3wsPuU | ||||||
| SOA | ns.checkdomain.dehostmaster@checkdomain.de 2026-04-20 #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=1778395881 | ||||||
Same first word
dot21.net |
Similar names
DNS History
5 records (5 active, 0 former)
●NSns.checkdomain.de2026-03-04 → 2026-05-10 · 2 obs
● 2026-05-10 07:20:56
●NSns2.checkdomain.de2026-03-04 → 2026-05-10 · 2 obs
● 2026-05-10 07:20:56
●MXmx03.secure-mailgate.com2026-03-04 → 2026-05-10 · 2 obs
● 2026-05-10 07:20:56
●MXmx04.secure-mailgate.com2026-03-04 → 2026-05-10 · 2 obs
● 2026-05-10 07:20:56
●A116.202.121.1352026-03-04 → 2026-05-10 · 2 obs
● 2026-05-10 07:20:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| dot21.net | ns.checkdomain.de, ns2.checkdomain.de | - |
✅ Authoritative Response
Server:109.237.143.11
NS records: ns.checkdomain.de, ns2.checkdomain.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for dot21.net (unsigned zone)
⏱️ Timing
Total: 707ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 116.202.121.135 |
| NS | 2 | ns2.checkdomain.de, ns.checkdomain.de |
| MX | 2 | mx04.secure-mailgate.com (pri: 20), mx03.secure-mailgate.com (pri: 10) |
| TXT | 2 | v=spf1 include:secure-mailgate.com ?all, google-site-verification=XnDr2T6MI2UpYdf |
| SOA | 1 | ns.checkdomain.de hostmaster.checkdomain |
Analysis
IP Addresses
dot21.net resolves to a single IP address: 116.202.121.135.
Other host names including die-hochzeitsmanager.de, pekic.de, c-it-work.de, doktor-weber.at and art-of-eschume.de share IP numbers with dot21.net.
Name Servers
dot21.net's delegation uses two name servers, ns2.checkdomain.de and ns.checkdomain.de.
dot21.net shares the same name server setup as other domains, for example schaefer.tax, enterprise-communication.com, vesturo.net, peprivate.com and exemco.com.
Host names with two IPs:
ns2.checkdomain.de points to: 2a01:4f8:2b02:a88::106 and 5.9.190.98
ns.checkdomain.de points to: 2a02:2b80:101:5000::9 and 109.237.143.11
Mail Servers
dot21.net is handled by two mail servers: mx03.secure-mailgate.com and mx04.secure-mailgate.com.
dot21.net shares its mail server setup with other domains, including equizentrum.com, acquisor.de, warmuth.co.at, monetafutura.org and mecsite.com.
dot21.net shares some mail servers with other domains, at least partially, for instance demoparkett.at.
Host names with two IPs:
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