cortech.cn - robtex.com
cortech.cn
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=2034667019 | ||||||
Subdomains
mail.cortech.cn |
Same first word
Similar names
DNS History
9 records (4 active, 5 former)
●NSdns23.hichina.com2015-08-15 → 2026-04-13 · 2 obs
● 2026-04-13 18:40:16
●NSdns24.hichina.com2015-08-15 → 2026-04-13 · 2 obs
● 2026-04-13 18:40:16
●MXmx01.euchost.com2026-03-26 → 2026-04-13 · 3 obs
● 2026-03-26 16:49:32
● 2026-04-13 18:40:16
●MXmx01.muchost.com2026-03-26 → 2026-04-13 · 3 obs
● 2026-03-26 16:49:32
● 2026-04-13 18:40:16
○MXmx01.ufhost.com2015-08-15 → 2017-03-20 · 4 obs
● 2017-03-20 10:29:26
○ 2020-02-09 04:20:06
○ 2026-04-13 18:40:16
○MXmxpro01.yovocloud.com2020-02-09 → 2020-02-09 · 4 obs
● 2020-02-09 04:20:06
○ 2026-03-26 16:49:32
○ 2026-04-13 18:40:16
○MXmxpro02.yovocloud.com2020-02-09 → 2020-02-09 · 4 obs
● 2020-02-09 04:20:06
○ 2026-03-26 16:49:32
○ 2026-04-13 18:40:16
○A123.57.2.412015-08-15 → 2020-02-09 · 4 obs
● 2020-02-09 04:20:06
○ 2026-03-26 16:49:32
○ 2026-04-13 18:40:16
○CNAMEcortech.cn.w.cdngslb.com2026-03-26 → 2026-03-26 · 3 obs
○ 2026-04-13 18:40:12
○ 2026-04-13 18:40:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| cortech.cn | dns23.hichina.com, dns24.hichina.com | - |
✅ Authoritative Response
Server:47.118.199.222
NS records: dns23.hichina.com, dns24.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cortech.cn (unsigned zone)
⏱️ Timing
Total: 1773ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | dns24.hichina.com, dns23.hichina.com |
| MX | 2 | mx01.euchost.com (pri: 5), mx01.muchost.com (pri: 10) |
| TXT | 1 | v=spf1 include:spf.cuchost.com ~all |
| SOA | 1 | dns23.hichina.com hostmaster.hichina.com |
Analysis
Hierarchy
The parent of mail.cortech.cn is cortech.cn.
Name Servers
Two name servers dns23.hichina.com and dns24.hichina.com handle the delegation for cortech.cn.
cortech.cn shares the same name server setup as other domains, for instance keli.com.cn, mutualfriends.cn, ydkb.com, everycare.cn and zkssg.com.
cortech.cn at least partially shares name servers with other domains, for instance keeptop.com, obul.cn, matterort.com, job16888.com and maiyif.cn.
These name servers are commonly used with expirens3.hichina.com, expirens4.hichina.com, dns25.hichina.com, dns26.hichina.com, ns1.sedoparking.com and ns2.sedoparking.com.
Host names with nine IP numbers:
dns23.hichina.com points to: 2408:4009:501::31, 39.96.153.40, 39.96.153.60, 47.118.199.200, 47.118.199.220, 120.76.107.40, 120.76.107.60, 139.224.142.100 and 139.224.142.110.
dns24.hichina.com points to: 2408:4009:501::32, 39.96.153.38, 39.96.153.61, 47.118.199.198, 47.118.199.222, 120.76.107.38, 120.76.107.61, 139.224.142.98 and 139.224.142.108.
Mail Servers
cortech.cn is handled by two mail servers: mx01.euchost.com and mx01.muchost.com.
cortech.cn uses the same mail server setup as other domains, for instance sh-xinxiong.com, tway.com.cn, smconlab.com, hzsw.cn and fimotioncn.com.
cortech.cn shares at least partially some mail servers with other domains, for instance rueiran.com, ox-chem.com, spectec.cn, ftfiberglass.com and nissin-dental.com.cn.
Mail servers are commonly used alongside mx01.ufhost.com, mxpro01.yovocloud.com and mxpro02.yovocloud.com.
Host names with six IP numbers.
The host name mx01.euchost.com points to 101.226.170.71, 101.226.170.72, 163.53.245.121, 163.53.245.122, 163.53.245.123 and 163.53.245.124.