cpp-tutor.com - robtex.com
cpp-tutor.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 157.90.66.230🇩🇪 Hetzner157.90.0.0/16 HETZNER-DC | ||||||
| PTR | static.230.66.90.157.clients.your-server.de | ||||||
| NS | ns21.kv.de ⭐ | ||||||
| A | 78.47.218.115🇩🇪 Hetzner78.46.0.0/15 HETZNER-RZ-NBG-BLK5 | ||||||
| PTR | static.115.218.47.78.clients.your-server.de | ||||||
| NS | ns22.kv.de | ||||||
| A | 157.90.66.230🇩🇪 Hetzner157.90.0.0/16 HETZNER-DC | ||||||
| PTR | static.230.66.90.157.clients.your-server.de | ||||||
| MX | mail.cpp-tutor.com ⭐ | ||||||
| A | 157.90.66.230🇩🇪 Hetzner157.90.0.0/16 HETZNER-DC | ||||||
| PTR | static.230.66.90.157.clients.your-server.de | ||||||
| TXT | google-site-verification=0x1_vdM1XaR-ABVwtYn67I1_CKhEKdSe_-nu8nf6UlM | ||||||
| TXT | v=spf1 +a +mx +a:www3.kv.de -all | ||||||
| SOA | ns21.kv.detechnik@kv-gmbh.de serial=1749133706 | ||||||
com
| 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=1787718005 | ||||||
Subdomains
mail.cpp-tutor.com |
Same first word
cpp-tutor.com |
cpp-tutor.de |
Previous names
Next names
cpp-tutorial.com |
cpp-tx.com |
cpp-uk.com |
cpp-us.com |
cpp-usa.com |
cpp-usage-dashboard.com |
cpp-world.com |
cpp00.com |
cpp001.com |
cpp0k.com |
cpp1.com |
cpp10.com |
cpp100.com |
cpp1000.com |
cpp101.com |
cpp11.com |
cpp114.com |
cpp118.com |
DNS History
13 records (4 active, 9 former)
○NSjm1.dns.com2019-12-22 → 2019-12-22 · 4 obs
○ 2017-02-19 23:53:04
● 2019-12-22 23:40:02
○ 2026-05-10 11:04:18
○ 2026-08-26 04:21:44
● 2019-12-22 23:40:02
○ 2026-05-10 11:04:18
○ 2026-08-26 04:21:44
○NSjm2.dns.com2019-12-22 → 2019-12-22 · 4 obs
○ 2017-02-19 23:53:04
● 2019-12-22 23:40:02
○ 2026-05-10 11:04:18
○ 2026-08-26 04:21:44
● 2019-12-22 23:40:02
○ 2026-05-10 11:04:18
○ 2026-08-26 04:21:44
●NSns21.kv.de2026-05-10 → 2026-08-26 · 3 obs
○ 2019-12-22 23:40:02
● 2026-05-10 11:04:18
● 2026-08-26 04:21:44
● 2026-05-10 11:04:18
● 2026-08-26 04:21:44
●NSns22.kv.de2026-05-10 → 2026-08-26 · 3 obs
○ 2019-12-22 23:40:02
● 2026-05-10 11:04:18
● 2026-08-26 04:21:44
● 2026-05-10 11:04:18
● 2026-08-26 04:21:44
○NSns43.domaincontrol.com2015-07-25 → 2017-02-19 · 4 obs
● 2015-07-25 04:45:38
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
○NSns44.domaincontrol.com2015-07-25 → 2017-02-19 · 4 obs
● 2015-07-25 04:45:38
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
●MXmail.cpp-tutor.com2026-05-10 → 2026-08-26 · 5 obs
○ 2019-12-22 23:40:02
● 2026-05-10 11:04:18
○ 2026-07-14 08:23:36
● 2026-07-30 15:18:32
● 2026-08-26 04:21:44
● 2026-05-10 11:04:18
○ 2026-07-14 08:23:36
● 2026-07-30 15:18:32
● 2026-08-26 04:21:44
○MXmailstore1.secureserver.net2015-07-25 → 2017-02-19 · 4 obs
● 2015-07-25 04:45:38
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
○MXsmtp.secureserver.net2015-07-25 → 2017-02-19 · 4 obs
● 2015-07-25 04:45:38
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
○A107.183.143.1412015-07-25 → 2015-12-07 · 4 obs
● 2015-07-25 04:45:38
● 2015-12-07 23:58:58
○ 2016-03-17 18:20:48
○ 2026-08-26 04:21:44
● 2015-12-07 23:58:58
○ 2016-03-17 18:20:48
○ 2026-08-26 04:21:44
○A154.90.184.1772019-12-22 → 2019-12-22 · 4 obs
○ 2017-02-19 23:53:04
● 2019-12-22 23:40:02
○ 2026-05-10 11:04:18
○ 2026-08-26 04:21:44
● 2019-12-22 23:40:02
○ 2026-05-10 11:04:18
○ 2026-08-26 04:21:44
●A157.90.66.2302026-05-10 → 2026-08-26 · 5 obs
○ 2019-12-22 23:40:02
● 2026-05-10 11:04:18
○ 2026-07-14 08:23:36
● 2026-07-30 15:18:32
● 2026-08-26 04:21:44
● 2026-05-10 11:04:18
○ 2026-07-14 08:23:36
● 2026-07-30 15:18:32
● 2026-08-26 04:21:44
○A23.110.127.782016-03-17 → 2017-02-19 · 5 obs
○ 2015-12-07 23:58:58
● 2016-03-17 18:20:48
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
● 2016-03-17 18:20:48
● 2017-02-19 23:53:04
○ 2019-12-22 23:40:02
○ 2026-08-26 04:21:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| cpp-tutor.com | ns21.kv.de, ns22.kv.de | - |
✅ Authoritative Response
Server:157.90.66.230
NS records: ns21.kv.de, ns22.kv.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cpp-tutor.com (unsigned zone)
⏱️ Timing
Total: 778ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 157.90.66.230 |
| NS | 2 | ns22.kv.de, ns21.kv.de |
| MX | 1 | mail.cpp-tutor.com (pri: 10) |
| TXT | 2 | google-site-verification=0x1_vdM1XaR-ABV, v=spf1 +a +mx +a:www3.kv.de -all |
| SOA | 1 | ns21.kv.de technik.kv-gmbh.de |
Analysis
Hierarchy
mail.cpp-tutor.com is a subdomain of cpp-tutor.com.
IP Addresses
cpp-tutor.com resolves to one IP address: 157.90.66.230.
websuche.eu, websuche.com, diktum.de and two other host names share IP numbers with cpp-tutor.com.
Name Servers
The NS records for cpp-tutor.com delegate to ns21.kv.de and ns22.kv.de.
cpp-tutor.com uses the same name servers as several other domains — among them 4.ly, mein-siegen.de, werbemail.de and two more.
Both ns21.kv.de and ns22.kv.de have a single IP address each — ns21.kv.de resolves to 78.47.218.115 while ns22.kv.de resolves to 157.90.66.230.
Mail Servers
Mail for cpp-tutor.com is handled by a single mail server, mail.cpp-tutor.com.
mail.cpp-tutor.com resolves to 157.90.66.230 and no other IP number.