coursetec.com - robtex.com
coursetec.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 185.135.241.123🇳🇱 hosting2go185.135.240.0/22 | ||||||
| PTR | server123.hosting2go.nl | ||||||
| NS | ns1.hosting2go.nl ⭐ | ||||||
| A | 2a06:f700:1::91🇳🇱 hosting2go2a06:f700::/29 | ||||||
| A | 185.135.240.91🇳🇱 hosting2go185.135.240.0/22 | ||||||
| PTR | ns1.hosting2go.nl | ||||||
| NS | ns2.hosting2go.nl | ||||||
| A | 2001:678:f2c::2🇳🇱 h2g2001:678:f2c::/48 | ||||||
| PTR | ns2.hosting2go.nl | ||||||
| A | 193.16.98.2🇳🇱 h2g193.16.98.0/24 | ||||||
| PTR | ns2.hosting2go.nl | ||||||
| MX | coursetec.com ⭐ | ||||||
| A | 185.135.241.123🇳🇱 hosting2go185.135.240.0/22 | ||||||
| PTR | server123.hosting2go.nl | ||||||
| TXT | v=spf1 include:spf.hosting2go.nl ~all | ||||||
| SOA | ns1.hosting2go.nlpostmaster@coursetec.com serial=1746770720 | ||||||
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 | ||||||
MX for
coursetec.com |
Same first word
coursetec.com |
Similar names
DNS History
5 records (4 active, 1 former)
●NSns1.hosting2go.nl2016-12-19 → 2026-03-23 · 2 obs
● 2026-03-23 13:33:26
●NSns2.hosting2go.nl2016-12-19 → 2026-03-23 · 2 obs
● 2026-03-23 13:33:26
●MXcoursetec.com2016-12-19 → 2026-03-23 · 2 obs
● 2026-03-23 13:33:26
●A185.135.241.1232026-03-07 → 2026-03-23 · 3 obs
● 2026-03-07 02:18:34
● 2026-03-23 13:33:26
○A83.137.198.92016-12-19 → 2018-08-28 · 4 obs
● 2018-08-28 17:51:58
○ 2026-03-07 02:18:34
○ 2026-03-23 13:33:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| coursetec.com | ns2.hosting2go.nl, ns1.hosting2go.nl | - |
✅ Authoritative Response
Server:185.135.240.91
NS records: ns2.hosting2go.nl, ns1.hosting2go.nl
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coursetec.com (unsigned zone)
⏱️ Timing
Total: 736ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 185.135.241.123 |
| NS | 2 | ns1.hosting2go.nl, ns2.hosting2go.nl |
| MX | 1 | coursetec.com (pri: 30) |
| TXT | 1 | v=spf1 include:spf.hosting2go.nl ~all |
| SOA | 1 | ns1.hosting2go.nl postmaster.coursetec.c |
Analysis
Mail Server Role
coursetec.com serves as the mail server for coursetec.com.
IP Addresses
coursetec.com resolves to a single IP address: 185.135.241.123.
Other host names including mail.rondomtuinen.com, jb8a8f8.com, astro-olympia.com, buurthuisoudoverdie.nl and unitydigital.net share IP numbers with coursetec.com.
Name Servers
coursetec.com's delegation uses two name servers, ns1.hosting2go.nl and ns2.hosting2go.nl.
coursetec.com shares the same name server setup as other domains, for example marcelsmit.nl, sosit.nl, molivi.com, holdmyhand.nl and demipoortman.nl.
coursetec.com at least partially shares name servers with other domains; for instance arkad.nl.
Host names with two IPs:
ns1.hosting2go.nl points to: 2a06:f700:1::91 and 185.135.240.91
ns2.hosting2go.nl points to: 2001:678:f2c::2 and 193.16.98.2
Mail Servers
A single mail server handles coursetec.com.
coursetec.com points to a single IP: 185.135.241.123.