decidecourse.net - robtex.com
decidecourse.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 52.27.79.221🇺🇸 Amazon52.24.0.0/14 EC2 PDX prefix | ||||||
| PTR | ec2-52-27-79-221.us-west-2.compute.amazonaws.com | ||||||
| NS | ns4.csof.net ⭐ | ||||||
| A | 52.20.19.77🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix | ||||||
| PTR | ec2-52-20-19-77.compute-1.amazonaws.com | ||||||
| NS | ns1.csof.net | ||||||
| A | 18.205.186.231🇺🇸 Amazon18.204.0.0/14 EC2 IAD prefix | ||||||
| PTR | ec2-18-205-186-231.compute-1.amazonaws.com | ||||||
| NS | ns2.csof.net | ||||||
| A | 23.21.178.27🇺🇸 Amazon23.20.0.0/15 EC2 IAD prefix | ||||||
| PTR | ec2-23-21-178-27.compute-1.amazonaws.com | ||||||
| NS | ns3.csof.net | ||||||
| A | 3.214.185.54🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix | ||||||
| PTR | ec2-3-214-185-54.compute-1.amazonaws.com | ||||||
| MX | mx1.decidecourse.net ⭐ | ||||||
| A | 46.4.12.146🇩🇪 Hetzner46.4.0.0/16 HETZNER-RZ-FKS-BLK3 | ||||||
| PTR | static.146.12.4.46.clients.your-server.de | ||||||
| MX | mx2.decidecourse.net ⭐ | ||||||
| A | 46.4.10.173🇩🇪 Hetzner46.4.0.0/16 HETZNER-RZ-FKS-BLK3 | ||||||
| PTR | static.173.10.4.46.clients.your-server.de | ||||||
| TXT | v=spf1 include:_incspfcheck.mailspike.net ?all | ||||||
| SOA | ns4.csof.nethostmaster@decidecourse.net serial=1777054399 | ||||||
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=1777053636 | ||||||
Subdomains
Same first word
decidecourse.net |
DNS History
7 records (7 active, 0 former)
●MXmx1.decidecourse.net2026-02-17 → 2026-04-24 · 2 obs
● 2026-04-24 18:14:38
●MXmx2.decidecourse.net2026-02-17 → 2026-04-24 · 2 obs
● 2026-04-24 18:14:38
●A52.27.79.2212026-02-17 → 2026-04-24 · 2 obs
● 2026-04-24 18:14:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| decidecourse.net | ns1.csof.net, ns2.csof.net, ns4.csof.net, ns3.csof.net | 4 records |
✅ Authoritative Response
Server:52.20.19.77
NS records: ns1.csof.net, ns2.csof.net, ns4.csof.net, ns3.csof.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for decidecourse.net (unsigned zone)
⏱️ Timing
Total: 100ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 52.27.79.221 |
| NS | 4 | ns4.csof.net, ns2.csof.net... |
| MX | 2 | mx2.decidecourse.net (pri: 10), mx1.decidecourse.net (pri: 10) |
| TXT | 1 | v=spf1 include:_incspfcheck.mailspike.ne |
| SOA | 1 | ns4.csof.net hostmaster.decidecourse.net |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns1.csof.net, ns2.csof.net, ns4.csof.net...)
Analysis
Hierarchy
decidecourse.net is a parent of mx1.decidecourse.net and mx2.decidecourse.net.
IP Addresses
decidecourse.net resolves to one IP number: 52.27.79.221.
Other host names, for instance www.e5a93fd27034f90450b593dbfdf1f4cc.com, 6f879b0c8a5f5bce41b5d157a7c70956.com, regular123.com, 9a895c967926090f4659493f936bc11c.xyz and m24.aapwdqx.in share IP numbers with decidecourse.net.
Name Servers
decidecourse.net delegates to four name servers: ns1.csof.net, ns2.csof.net, ns3.csof.net and ns4.csof.net.
decidecourse.net at least partially shares name servers with other domains, including 365tracker.us, a36cb4c55ec43912f0103b0ec669dbaa.org, grhjojbk.com, wcxkv70cbfa191ea.top and www.pirateproxy.tf.
These name servers are commonly used together with the name servers ns7.csof.net, ns5.csof.net, ns6.csof.net and ns8.csof.net.
Host names with one IP number:
ns1.csof.net points to 18.205.186.231; ns2.csof.net points to 23.21.178.27; ns3.csof.net points to 3.214.185.54; ns4.csof.net points to 52.20.19.77.
Mail Servers
decidecourse.net is served by two mail servers mx1.decidecourse.net and mx2.decidecourse.net.
Host names with a single IP address: mx1.decidecourse.net points to 46.4.12.146; mx2.decidecourse.net points to 46.4.10.173.