coursetec.com - dns.ninja
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=1777788316 | ||||||
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=1782601910 | ||||||
MX for
coursetec.com |
Same first word
coursetec.com |
Similar names
DNS History
5 records (4 active, 1 former)
●NSns1.hosting2go.nl2016-12-19 → 2026-06-27 · 2 obs
● 2026-06-27 23:18:38
●NSns2.hosting2go.nl2016-12-19 → 2026-06-27 · 2 obs
● 2026-06-27 23:18:38
●MXcoursetec.com2016-12-19 → 2026-06-27 · 2 obs
● 2026-06-27 23:18:38
●A185.135.241.1232026-03-07 → 2026-06-27 · 3 obs
● 2026-03-07 02:18:34
● 2026-06-27 23:18:38
○A83.137.198.92016-12-19 → 2018-08-28 · 4 obs
● 2018-08-28 17:51:58
○ 2026-03-07 02:18:34
○ 2026-06-27 23:18:38
🔍 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:193.16.98.2
NS records: ns2.hosting2go.nl, ns1.hosting2go.nl
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coursetec.com (unsigned zone)
⏱️ Timing
Total: 979ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 185.135.241.123 |
| NS | 2 | ns2.hosting2go.nl, ns1.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 a mail server for coursetec.com.
IP Addresses
coursetec.com has exactly one IP address — 185.135.241.123.
mail.rondomtuinen.com, jb8a8f8.com, astro-olympia.com plus two other host names have IP numbers in common with coursetec.com.
Name Servers
coursetec.com is served by two delegated name servers, ns1.hosting2go.nl and ns2.hosting2go.nl.
The name server configuration of coursetec.com is shared with other domains, for instance carillontorens.com, marcelsmit.nl, sosit.nl and two others.
The DNS delegation for coursetec.com at least partly coincides with that of other domains, arkad.nl being one example.
Each of the two host names carries two IP addresses: ns1.hosting2go.nl points to 185.135.240.91 and 2a06:f700:1::91, and ns2.hosting2go.nl points to 193.16.98.2 and 2001:678:f2c::2.
Mail Servers
coursetec.com uses exactly one mail server, which is coursetec.com.
There is one IP number for coursetec.com: 185.135.241.123.