52opencourse.com - dns.ninja
52opencourse.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 208.98.43.36🇺🇸 SHARKTECH-1208.98.43.0/24 | ||||||
| PTR | rylandhomesmktg.com | ||||||
| NS | www.52opencourse.com ⭐ | ||||||
| A | 208.98.40.40🇺🇸 SHARKTECH-1208.98.40.0/24 | ||||||
| NS | ns1.4.cn ⚠️ Not in zone NS records | ||||||
| A | 107.167.27.66🇺🇸 SHARKTECH-1107.167.27.0/24 CMI (Customer Route) | ||||||
| NS | ns2.4.cn ⚠️ Not in zone NS records | ||||||
| A | 208.98.43.66🇺🇸 SHARKTECH-1208.98.43.0/24 | ||||||
| PTR | jensenstilbud.com | ||||||
| SOA | www.52opencourse.com52opencourse@com 2008-08-03 #0 | ||||||
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=1786920684 | ||||||
Subdomains
www.52opencourse.com |
Same first word
52opencourse.com |
DNS History
12 records (4 active, 8 former)
○NSf1g1ns1.dnspod.net2015-07-09 → 2017-02-07 · 4 obs
● 2017-02-07 23:53:26
○ 2026-06-07 09:35:42
○ 2026-08-16 23:15:24
○NSf1g1ns2.dnspod.net2015-07-09 → 2017-02-07 · 4 obs
● 2017-02-07 23:53:26
○ 2026-06-07 09:35:42
○ 2026-08-16 23:15:24
●NSns1.4.cn2026-06-07 → 2026-08-16 · 3 obs
● 2026-06-07 09:35:42
● 2026-08-16 23:15:24
●NSns2.4.cn2026-06-07 → 2026-08-16 · 3 obs
● 2026-06-07 09:35:42
● 2026-08-16 23:15:24
●NSwww.52opencourse.com2026-06-07 → 2026-08-16 · 3 obs
● 2026-06-07 09:35:42
● 2026-08-16 23:15:24
○A106.185.36.2122015-11-16 → 2018-08-29 · 5 obs
● 2015-11-16 17:06:30
● 2018-08-29 18:26:30
○ 2026-06-07 09:35:42
○ 2026-08-16 23:15:24
○A198.211.103.352015-07-09 → 2015-07-09 · 3 obs
○ 2015-11-16 17:06:30
○ 2026-08-16 23:15:24
○A208.98.40.2242026-07-23 → 2026-07-23 · 3 obs
● 2026-07-23 19:36:32
○ 2026-08-16 23:15:24
○A208.98.40.2262026-07-12 → 2026-07-12 · 4 obs
● 2026-07-12 00:06:54
○ 2026-07-23 19:36:32
○ 2026-08-16 23:15:24
○A208.98.40.992026-07-11 → 2026-07-11 · 4 obs
● 2026-07-11 13:28:32
○ 2026-07-12 00:06:54
○ 2026-08-16 23:15:24
●A208.98.43.362026-08-16 → 2026-08-16 · 2 obs
● 2026-08-16 23:15:24
○A208.98.43.802026-06-07 → 2026-06-07 · 4 obs
● 2026-06-07 09:35:42
○ 2026-07-11 13:28:32
○ 2026-08-16 23:15:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | e.gtld-servers.net, c.gtld-servers.net, m.gtld-servers.net, b.gtld-servers.net... | - |
| 52opencourse.com | ns1.4.cn, ns2.4.cn | - |
✅ Authoritative Response
Server:208.98.43.66
NS records: ns1.4.cn, ns2.4.cn
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 52opencourse.com (unsigned zone)
⏱️ Timing
Total: 851ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 208.98.43.36 |
| SOA | 1 | www.52opencourse.com 52opencourse.com |
Analysis
Hierarchy
52opencourse.com is a parent domain of www.52opencourse.com.
IP Addresses
52opencourse.com resolves to just one IP address, 208.98.43.36.
Two other host names, along with jwlyjx.com, www.vip88888.com and gtmm.net, also share IP numbers with 52opencourse.com.
Name Servers
DNS for 52opencourse.com is handled by three authoritative name servers: ns1.4.cn, ns2.4.cn and www.52opencourse.com.
52opencourse.com shares at least some of its name servers with other domains, including gdqhkh.com, 111322.com, whhpcdc.com and two others.
The name servers ns3.goldenname.com, ns4.goldenname.com, www.gdqhkh.com and two others are commonly seen in use alongside these name servers.
ns1.4.cn, ns2.4.cn and www.52opencourse.com all have one IP address each — ns1.4.cn directs to 107.167.27.66, ns2.4.cn directs to 208.98.43.66 and www.52opencourse.com directs to 208.98.40.40.