dotnetmastery.com - robtex.com
dotnetmastery.com
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=1771291435 | ||||||
Same first word
dotnetmastery.com |
DNS History
12 records (6 active, 6 former)
●NSns1.site4now.net2026-03-21 → 2026-03-22 · 3 obs
● 2026-03-21 15:23:38
● 2026-03-22 19:31:06
●NSns2.site4now.net2026-03-21 → 2026-03-22 · 3 obs
● 2026-03-21 15:23:38
● 2026-03-22 19:31:06
●NSns3.site4now.net2026-03-21 → 2026-03-22 · 3 obs
● 2026-03-21 15:23:38
● 2026-03-22 19:31:06
○NSns51.1and1.com2008-03-14 → 2017-06-09 · 4 obs
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-03-22 19:31:06
○NSns52.1and1.com2008-03-14 → 2017-06-09 · 4 obs
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-03-22 19:31:06
○MXmx00.1and1.com2008-03-14 → 2017-06-09 · 4 obs
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-03-22 19:31:06
○MXmx01.1and1.com2008-03-14 → 2017-06-09 · 4 obs
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-03-22 19:31:06
●MXmx01.mail.icloud.com2026-03-21 → 2026-03-22 · 3 obs
● 2026-03-21 15:23:38
● 2026-03-22 19:31:06
●MXmx02.mail.icloud.com2026-03-21 → 2026-03-22 · 3 obs
● 2026-03-21 15:23:38
● 2026-03-22 19:31:06
●A20.118.48.32026-03-21 → 2026-03-22 · 3 obs
● 2026-03-21 15:23:38
● 2026-03-22 19:31:06
○A216.250.121.22016-09-27 → 2017-06-09 · 5 obs
● 2016-09-27 02:50:26
● 2017-06-09 13:21:00
○ 2026-03-21 15:23:38
○ 2026-03-22 19:31:06
○A74.208.29.702008-03-14 → 2016-04-13 · 4 obs
● 2016-04-13 22:24:28
○ 2016-09-27 02:50:26
○ 2026-03-22 19:31:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| dotnetmastery.com | ns1.site4now.net, ns2.site4now.net, ns3.site4now.net | - |
✅ Authoritative Response
Server: 45.58.159.230
NS records: ns1.site4now.net, ns2.site4now.net, ns3.site4now.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for dotnetmastery.com (unsigned zone)
⏱️ Timing
Total: 497ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 20.118.48.3 |
| NS | 3 | ns2.site4now.net, ns3.site4now.net... |
| MX | 2 | mx02.mail.icloud.com (pri: 10), mx01.mail.icloud.com (pri: 10) |
| TXT | 4 | v=spf1 include:spf.mailjet.com ~all, MS=ms31933999... |
| SOA | 1 | ns1.site4now.net hostmaster.mywindowshos |
Analysis
IP Addresses
dotnetmastery.com points to a single IP: 20.118.48.3.
Other host names, for instance fiberonascendant.com, bimsmith.com, encina.org, wheelerassoc.com and lubesadcreator.com share IP numbers with dotnetmastery.com.
Name Servers
dotnetmastery.com is delegated to three name servers: ns1.site4now.net, ns2.site4now.net and ns3.site4now.net.
dotnetmastery.com at least partially shares its name servers with other domains, for instance alfoadia.com.sa, siminat.com, shilla.club, fgasports.com and hrchex.com.
Host names with three IP numbers:
ns1.site4now.net points to 70.39.73.45, 204.188.197.84 and 204.188.197.246.
ns2.site4now.net points to 45.58.159.232, 45.58.159.233 and 208.98.36.41.
ns3.site4now.net points to 45.58.159.230, 45.58.159.231 and 208.98.36.42.
Mail Servers
Two mail servers mx01.mail.icloud.com and mx02.mail.icloud.com handle dotnetmastery.com.
dotnetmastery.com uses the same mail server setup as other domains such as teamkennedy.net, hansras.com, kopalsky.com, pickave.net and kotsarev.ru.
dotnetmastery.com shares some mail servers with other domains at least partially, for example firma12.com.
Host names with six IP numbers:
Host name mx01.mail.icloud.com points to: 17.42.251.62, 17.56.9.31, 17.57.152.5, 17.57.154.33, 17.57.155.25 and 17.57.156.30.
Host name mx02.mail.icloud.com points to: 17.42.251.62, 17.56.9.31, 17.57.152.5, 17.57.154.33, 17.57.155.25 and 17.57.156.30.
Host names pointing to 17.42.251.62: mx01.mail.icloud.com and mx02.mail.icloud.com.
Host names pointing to 17.56.9.31: mx01.mail.icloud.com and mx02.mail.icloud.com.
Host names pointing to 17.57.152.5: mx01.mail.icloud.com and mx02.mail.icloud.com.
Host names pointing to 17.57.154.33: mx01.mail.icloud.com and mx02.mail.icloud.com.
Host names pointing to 17.57.155.25: mx01.mail.icloud.com and mx02.mail.icloud.com.
Host names pointing to 17.57.156.30: mx01.mail.icloud.com and mx02.mail.icloud.com.