everycourse.cn - robtex.com
everycourse.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.judns.com ⚠️ Not in zone NS records | ||||||
| A | 162.159.27.251Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns1.julydns.com ⚠️ Not in parent delegation | ||||||
| A | 162.159.48.223Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.judns.com ⚠️ Not in zone NS records | ||||||
| A | 162.159.27.251Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.julydns.com ⚠️ Not in parent delegation | ||||||
| A | 162.159.48.223Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
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=2035003857 | ||||||
Same first word
everycourse.com |
everycourse.cn |
everycourse.ru |
Similar names
DNS History
9 records (4 active, 5 former)
●NSns1.judns.com2026-05-19 → 2026-07-05 · 3 obs
● 2026-05-19 17:42:00
● 2026-07-05 01:51:06
●NSns1.julydns.com2026-05-19 → 2026-07-05 · 3 obs
● 2026-05-19 17:42:00
● 2026-07-05 01:51:06
●NSns2.judns.com2026-05-19 → 2026-07-05 · 3 obs
● 2026-05-19 17:42:00
● 2026-07-05 01:51:06
●NSns2.julydns.com2026-05-19 → 2026-07-05 · 3 obs
● 2026-05-19 17:42:00
● 2026-07-05 01:51:06
○NSns6.careerjet.net2015-07-21 → 2018-08-16 · 4 obs
● 2018-08-16 11:23:24
○ 2026-05-19 17:42:00
○ 2026-07-05 01:51:06
○NSns7.careerjet.net2015-07-21 → 2018-08-16 · 4 obs
● 2018-08-16 11:23:24
○ 2026-05-19 17:42:00
○ 2026-07-05 01:51:06
○MXmail2.careerjet.net2015-07-21 → 2018-08-16 · 4 obs
● 2018-08-16 11:23:24
○ 2026-05-19 17:42:00
○ 2026-07-05 01:51:06
○A193.164.203.312015-07-21 → 2018-08-16 · 4 obs
● 2018-08-16 11:23:24
○ 2026-05-19 17:42:00
○ 2026-07-05 01:51:06
○A193.164.203.322015-07-21 → 2018-08-16 · 4 obs
● 2018-08-16 11:23:24
○ 2026-05-19 17:42:00
○ 2026-07-05 01:51:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| everycourse.cn | ns1.judns.com, ns2.judns.com | - |
✅ Authoritative Response
Server:162.159.27.251
NS records: ns1.judns.com, ns2.judns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for everycourse.cn (unsigned zone)
⏱️ Timing
Total: 1535ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns1.julydns.com, ns2.julydns.com |
Analysis
Name Servers
Four name servers handle the delegation for everycourse.cn: ns1.judns.com, ns2.judns.com, ns1.julydns.com and ns2.julydns.com.
everycourse.cn shares at least some of its name servers with other domains, including 90mzf.cn, cdbyj.com, mynxr.com and two others.
These name servers are frequently paired with the name servers ns1.onclouddns.com and ns2.onclouddns.com.
ns1.judns.com and ns2.judns.com share the IP address 162.159.27.251; ns1.julydns.com and ns2.julydns.com share the IP address 162.159.48.223.
These two host names — ns1.judns.com and ns2.judns.com — each point to 162.159.27.251 IP addresses.
These two host names — ns1.julydns.com and ns2.julydns.com — each point to 162.159.48.223 IP addresses.