lk21.study - robtex.com
lk21.study
| DNSSEC | ⚠️ Not signed | ||||||
| A | 31.220.94.224🇩🇪 CONTABO31.220.88.0/21 | ||||||
| PTR | vmi1693098.contaboserver.net | ||||||
| NS | ns1.contabo.net ⭐ | ||||||
| A | 2a02:c207:ff00:1200::1🇩🇪 CONTABO2a02:c207::/32 | ||||||
| A | 5.180.150.13🇺🇸 CONTABO5.180.150.0/24 | ||||||
| PTR | ns1.contabo.net | ||||||
| NS | ns2.contabo.net | ||||||
| A | 2a02:c202:5028:1200::1🇩🇪 CONTABO2a02:c202::/32 | ||||||
| A | 195.179.224.10🇩🇪 CONTABO195.179.224.0/21 | ||||||
| PTR | ns2.contabo.net | ||||||
| NS | ns3.contabo.net | ||||||
| A | 2605:a140:5028:1200::1🇺🇸 CONTABO-USA2605:a140::/32 710 N Tucker Blvd. STE 400A St. Louis MO 63101 United States | ||||||
| A | 209.126.15.15🇺🇸 CONTABO-USA209.126.0.0/20 710 N Tucker Blvd. STE 400A St. Louis MO 63101 United States | ||||||
| PTR | ns3.contabo.net | ||||||
| MX | mail.lk21.study ⭐ | ||||||
| A | 31.220.94.224🇩🇪 CONTABO31.220.88.0/21 | ||||||
| PTR | vmi1693098.contaboserver.net | ||||||
| SOA | ns1.contabo.nethostmaster@contabo.de serial=1775202254 | ||||||
study
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.nic.study ⭐ | ||||||
| NS | b.nic.study | ||||||
| NS | c.nic.study | ||||||
| NS | x.nic.study | ||||||
| NS | y.nic.study | ||||||
| NS | z.nic.study | ||||||
| SOA | a.nic.studyadmin@tldns.godaddy serial=1775200600 | ||||||
Subdomains
mail.lk21.study |
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●NSns1.contabo.net2026-03-23 → 2026-04-03 · 2 obs
● 2026-04-03 07:44:14
●NSns2.contabo.net2026-03-23 → 2026-04-03 · 2 obs
● 2026-04-03 07:44:14
●NSns3.contabo.net2026-03-23 → 2026-04-03 · 2 obs
● 2026-04-03 07:44:14
●MXmail.lk21.study2026-03-23 → 2026-04-03 · 2 obs
● 2026-04-03 07:44:14
●A31.220.94.2242026-03-23 → 2026-04-03 · 2 obs
● 2026-04-03 07:44:14
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| study | a.nic.study, b.nic.study, c.nic.study, x.nic.study... | 12 records |
| lk21.study | ns2.contabo.net, ns1.contabo.net, ns3.contabo.net | - |
✅ Authoritative Response
Server:209.126.15.15
NS records: ns2.contabo.net, ns1.contabo.net, ns3.contabo.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for lk21.study (unsigned zone)
⏱️ Timing
Total: 528ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 31.220.94.224 |
| NS | 3 | ns1.contabo.net, ns3.contabo.net... |
| MX | 1 | mail.lk21.study (pri: 10) |
| SOA | 1 | ns1.contabo.net hostmaster.contabo.de |
📌 Glue Records Collected
Total: 12
In-bailiwick: 12 (a.nic.study, a.nic.study, b.nic.study...)
Analysis
Hierarchy
lk21.study is the parent of mail.lk21.study.
IP Addresses
lk21.study resolves to a single IP: 31.220.94.224.
Other host names, for instance mail.lk21.bar, mail.subindo.co.uk, lk21.garden, lk21.cyou and lk21.subindo.co.uk share IP numbers with lk21.study.
Name Servers
lk21.study delegates to three name servers: ns1.contabo.net, ns2.contabo.net and ns3.contabo.net.
lk21.study shares some name servers with other domains, for example 105.97.161.in-addr.arpa, sbrstore.com, akc.hu, autoeno.al and marige.pt.
Host names with two IP numbers:
ns1.contabo.net: 2a02:c207:ff00:1200::1 and 5.180.150.13
ns2.contabo.net: 2a02:c202:5028:1200::1 and 195.179.224.10
ns3.contabo.net: 2605:a140:5028:1200::1 and 209.126.15.15
Mail Servers
lk21.study is handled by a single mail server, mail.lk21.study.
Host name mail.lk21.study points to IP 31.220.94.224.