tcoursetech.com - dns.ninja
tcoursetech.com
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.gabia.co.kr ⭐ | ||||||
| A | 20.200.205.248🇰🇷 Microsoft20.192.0.0/10 | ||||||
| NS | ns.gabia.co.kr | ||||||
| A | 43.201.170.100🇰🇷 Amazon43.200.0.0/14 EC2 ICN Prefix | ||||||
| PTR | ec2-43-201-170-100.ap-northeast-2.compute.amazonaws.com | ||||||
| NS | ns.gabia.net | ||||||
| A | 121.78.117.39🇰🇷 GABIA-AS-KR121.78.117.0/24 Transit customer route announce | ||||||
| PTR | ns1.gabia.co.kr | ||||||
| A | 211.234.124.90🇰🇷 DACOM-NET211.234.0.0/17 contact jblee@aunet.nm.kr if necessary contact ojupark@aunet.nm.kr if necessary | ||||||
| MX | mail.tcoursetech.com ⭐ | ||||||
| TXT | v=spf1 include:_spf.hiworks.co.kr ~all | ||||||
| SOA | ns.gabia.co.krhosting@gabia.com 2019-12-03 #15 | ||||||
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=1786662879 | ||||||
Subdomains
mail.tcoursetech.com |
Same first word
tcoursetech.com |
Similar names
secrettouch.de |
secrettouch.com.au |
techscouter.blogspot.com |
techscouter.org |
streetcouch.com |
couchtester.com |
secrettouch.com |
techscouter.com |
DNS History
4 records (4 active, 0 former)
●NSns.gabia.co.kr2008-03-11 → 2026-08-13 · 2 obs
● 2026-08-13 23:28:54
●NSns.gabia.net2015-07-03 → 2026-08-13 · 3 obs
● 2015-07-03 20:11:26
● 2026-08-13 23:28:54
●NSns1.gabia.co.kr2008-03-11 → 2026-08-13 · 2 obs
● 2026-08-13 23:28:54
●MXmail.tcoursetech.com2008-03-11 → 2026-08-13 · 2 obs
● 2026-08-13 23:28:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| tcoursetech.com | ns.gabia.co.kr, ns1.gabia.co.kr, ns.gabia.net | - |
✅ Authoritative Response
Server:43.201.170.100
NS records: ns.gabia.co.kr, ns1.gabia.co.kr, ns.gabia.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for tcoursetech.com (unsigned zone)
⏱️ Timing
Total: 1180ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 3 | ns.gabia.co.kr, ns1.gabia.co.kr... |
| MX | 1 | mail.tcoursetech.com (pri: 10) |
| TXT | 1 | v=spf1 include:_spf.hiworks.co.kr ~all |
| SOA | 1 | ns.gabia.co.kr hosting.gabia.com |
Analysis
Hierarchy
tcoursetech.com is a parent domain of mail.tcoursetech.com.
Name Servers
Three name servers are authoritative for tcoursetech.com: ns.gabia.net, ns1.gabia.co.kr and ns.gabia.co.kr.
tcoursetech.com shares at least some of its name servers with other domains, including miradisk.com, hapdong.ac.kr, daewonchain.com and two others.
These name servers are frequently seen alongside the name servers ns1.gabia.net.
Hostnames that resolve to two IP addresses:
ns.gabia.net maps to two IP addresses — 121.78.117.39 and 211.234.124.90.
Hosts with just one IP address:
ns1.gabia.co.kr points to the IP address 20.200.205.248.
ns.gabia.co.kr points to the IP address 43.201.170.100.
Mail Servers
Mail for tcoursetech.com is handled by a single mail server, mail.tcoursetech.com.