openlearning.cn - dns.ninja
openlearning.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 198.50.252.65🇨🇦 OVH198.50.128.0/17 Hosting route | ||||||
| PTR | ip65.ip-198-50-252.net | ||||||
| NS | ns1.instradns.com ⭐ | ||||||
| A | 75.2.6.34🇺🇸 Amazon75.2.0.0/20 | ||||||
| PTR | aef93cd39153ffbac.awsglobalaccelerator.com | ||||||
| NS | ns2.instradns.com | ||||||
| A | 75.2.85.37🇺🇸 Amazon75.2.80.0/20 | ||||||
| NS | ns3.instradns.com | ||||||
| A | 99.83.188.20🇺🇸 Amazon99.83.176.0/20 | ||||||
| MX | mail.openlearning.cn ⭐ | ||||||
| A | 66.70.178.74🇨🇦 OVH66.70.128.0/17 Hosting route | ||||||
| PTR | ns547779.ip-66-70-178.net | ||||||
| SOA | ns1.instradns.comroot@instra.com 2021-01-11 #1 | ||||||
cn
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.dns.cn ⭐ | ||||||
| NS | b.dns.cn | ||||||
| NS | c.dns.cn | ||||||
| NS | d.dns.cn | ||||||
| NS | e.dns.cn | ||||||
| NS | ns.cernet.net ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.cnroot@cnnic.cn serial=2034953769 | ||||||
Subdomains
mail.openlearning.cn |
Same first word
Similar names
DNS History
12 records (5 active, 7 former)
○NSns.dns.net.cn2015-05-26 → 2016-07-16 · 4 obs
● 2016-07-16 18:08:40
○ 2017-02-19 11:41:00
○ 2026-06-22 06:48:52
●NSns1.instradns.com2026-04-02 → 2026-06-22 · 3 obs
● 2026-04-02 19:08:30
● 2026-06-22 06:48:52
●NSns2.instradns.com2026-04-02 → 2026-06-22 · 3 obs
● 2026-04-02 19:08:30
● 2026-06-22 06:48:52
●NSns3.instradns.com2026-04-02 → 2026-06-22 · 3 obs
● 2026-04-02 19:08:30
● 2026-06-22 06:48:52
○NSns7.dns.net.cn2015-05-26 → 2017-02-19 · 6 obs
○ 2015-10-18 15:16:52
● 2016-07-16 18:08:40
● 2017-02-19 11:41:00
○ 2019-03-11 00:15:58
○ 2026-06-22 06:48:52
○NSwww.openlearning.cn2019-03-11 → 2019-03-11 · 4 obs
● 2019-03-11 00:15:58
○ 2026-04-02 19:08:30
○ 2026-06-22 06:48:52
●MXmail.openlearning.cn2026-04-02 → 2026-06-22 · 3 obs
● 2026-04-02 19:08:30
● 2026-06-22 06:48:52
○MXmxbiz1.qq.com2015-10-18 → 2016-07-16 · 4 obs
● 2016-07-16 18:08:40
○ 2019-03-11 00:15:58
○ 2026-06-22 06:48:52
○MXmxbiz2.qq.com2015-10-18 → 2016-07-16 · 4 obs
● 2016-07-16 18:08:40
○ 2019-03-11 00:15:58
○ 2026-06-22 06:48:52
○A114.255.218.1742015-05-26 → 2016-07-16 · 4 obs
● 2016-07-16 18:08:40
○ 2019-03-11 00:15:58
○ 2026-06-22 06:48:52
●A198.50.252.652026-04-02 → 2026-06-22 · 3 obs
● 2026-04-02 19:08:30
● 2026-06-22 06:48:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | d.dns.cn, b.dns.cn, a.dns.cn, c.dns.cn... | - |
| openlearning.cn | ns1.instradns.com, ns2.instradns.com, ns3.instradns.com | - |
✅ Authoritative Response
Server:99.83.188.20
NS records: ns1.instradns.com, ns2.instradns.com, ns3.instradns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for openlearning.cn (unsigned zone)
⏱️ Timing
Total: 990ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 198.50.252.65 |
| NS | 3 | ns2.instradns.com, ns1.instradns.com... |
| MX | 1 | mail.openlearning.cn (pri: 10) |
| SOA | 1 | ns1.instradns.com root.instra.com |
Analysis
Hierarchy
mail.openlearning.cn is a subdomain of openlearning.cn.
IP Addresses
openlearning.cn directs to one IP number, which is 198.50.252.65.
Among the host names that share IP numbers with openlearning.cn are lifeoil.eu, deltagroup.at, taperloc.dk and two others.
Name Servers
openlearning.cn is delegated to three name servers: ns1.instradns.com, ns2.instradns.com and ns3.instradns.com.
The name servers of openlearning.cn overlap at least partially with those of other domains — among them oakdalemeat.com.au, lika.jp, omoni.be and two more.
These name servers are routinely co-deployed with the name servers ns11.globehosting.net, ns12.globehosting.net, ns1.hostingww.com and two others.
ns1.instradns.com, ns2.instradns.com and ns3.instradns.com each resolve to a single IP address: ns1.instradns.com resolves to 75.2.6.34, ns2.instradns.com resolves to 75.2.85.37 and ns3.instradns.com resolves to 99.83.188.20.
Mail Servers
openlearning.cn routes its mail through a single mail server, mail.openlearning.cn.
mail.openlearning.cn resolves to a single IP number: 66.70.178.74.