certifycourses.com - dns.ninja
certifycourses.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 207.148.248.143🇺🇸 EIG-29873207.148.248.0/24 | ||||||
| NS | ns.buydomains.com ⚠️ Not in zone NS records | ||||||
| A | 52.20.26.87🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix | ||||||
| PTR | ec2-52-20-26-87.compute-1.amazonaws.com | ||||||
| NS | this-domain-for-sale.com ⚠️ Not in zone NS records | ||||||
| A | 52.20.26.87🇺🇸 Amazon52.20.0.0/14 EC2 IAD prefix | ||||||
| PTR | ec2-52-20-26-87.compute-1.amazonaws.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=1785725122 | ||||||
Subdomains
mail.certifycourses.com |
Same first word
certifycourses.com |
DNS History
9 records (3 active, 6 former)
●NSns.buydomains.com2017-10-16 → 2026-08-03 · 3 obs
● 2017-10-16 05:19:46
● 2026-08-03 02:49:16
○NSns1.domenai.lt2016-12-15 → 2016-12-15 · 3 obs
○ 2017-10-16 05:19:46
○ 2026-08-03 02:49:16
○NSns2.domenai.lt2016-12-15 → 2016-12-15 · 3 obs
○ 2017-10-16 05:19:46
○ 2026-08-03 02:49:16
○NSns3.domenai.lt2016-12-15 → 2016-12-15 · 3 obs
○ 2017-10-16 05:19:46
○ 2026-08-03 02:49:16
●NSthis-domain-for-sale.com2026-03-06 → 2026-08-03 · 3 obs
● 2026-03-06 14:17:58
● 2026-08-03 02:49:16
○MXmail.certifycourses.com2016-12-15 → 2016-12-15 · 3 obs
○ 2017-10-16 05:19:46
○ 2026-08-03 02:49:16
○A141.136.40.1192016-12-15 → 2016-12-15 · 3 obs
○ 2017-10-16 05:19:46
○ 2026-08-03 02:49:16
●A207.148.248.1432026-03-06 → 2026-08-03 · 3 obs
● 2026-03-06 14:17:58
● 2026-08-03 02:49:16
○A209.99.64.432017-10-16 → 2017-10-16 · 4 obs
● 2017-10-16 05:19:46
○ 2026-03-06 14:17:58
○ 2026-08-03 02:49:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| certifycourses.com | ns.buydomains.com, this-domain-for-sale.com | 2 records |
✅ Authoritative Response
Server:52.4.207.204
NS records: ns.buydomains.com, this-domain-for-sale.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for certifycourses.com (unsigned zone)
⏱️ Timing
Total: 223ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 207.148.248.143 |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns.buydomains.com, this-domain-for-sale.com)
Analysis
Hierarchy
The domain mail.certifycourses.com falls under the parent certifycourses.com.
IP Addresses
certifycourses.com points to a single IP number: 207.148.248.143.
Additional host names — elegantchange.com, zerodollars.com, pdksystems.com and two others — share IP numbers with certifycourses.com.
Name Servers
Two name servers handle the delegation for certifycourses.com: this-domain-for-sale.com and ns.buydomains.com.
certifycourses.com shares its name server setup with other domains, including minuteapproval.com, sportoffroad.com, bloomingedible.com and two others.
At least some of certifycourses.com's name servers are shared with other domains, for example technologynetwork.org, ekki.org, internetrockstars.com and two more.
These name servers tend to be used in conjunction with the name servers ns2.buydomains.com.
this-domain-for-sale.com directs to 52.20.26.87, as does ns.buydomains.com — both hostnames resolve to that one IP address.
this-domain-for-sale.com along with ns.buydomains.com each resolve to 52.20.26.87 IP addresses.