coukuan.com - robtex.com
coukuan.com
| DNSSEC | ⚠️ Not signed | ||||||
| NS | dns25.hichina.com ⭐ | ||||||
| A | 2408:4009:501::33🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.39🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.59🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.199🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.219🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.39🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.59🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.99🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| A | 139.224.142.109🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| NS | dns26.hichina.com | ||||||
| A | 2408:4009:501::34🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.37🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.62🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.197🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.221🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.37🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.62🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.102🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| A | 139.224.142.107🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| MX | mail.coukuan.com ⭐ | ||||||
| A | 49.51.242.15🇺🇸 TENCENT-NET-AP-CN49.51.242.0/23 Proxy-registered route object | ||||||
| SOA | dns25.hichina.comhostmaster@hichina.com 2026-01-09 #13 | ||||||
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=1778553751 | ||||||
Subdomains
mail.coukuan.com |
Same first word
coukuan.com |
Similar names
DNS History
11 records (3 active, 8 former)
●NSdns25.hichina.com2026-04-14 → 2026-05-12 · 3 obs
● 2026-04-14 21:55:12
● 2026-05-12 03:10:08
●NSdns26.hichina.com2026-04-14 → 2026-05-12 · 3 obs
● 2026-04-14 21:55:12
● 2026-05-12 03:10:08
○NSns1.sedoparking.com2015-05-31 → 2016-12-22 · 4 obs
● 2016-12-22 14:33:26
○ 2019-02-22 01:36:58
○ 2026-05-12 03:10:08
○NSns2.sedoparking.com2015-05-31 → 2016-12-22 · 4 obs
● 2016-12-22 14:33:26
○ 2019-02-22 01:36:58
○ 2026-05-12 03:10:08
○NSns3.dns.com2019-02-22 → 2019-02-22 · 4 obs
● 2019-02-22 01:36:58
○ 2026-04-14 21:55:12
○ 2026-05-12 03:10:08
○NSns4.dns.com2019-02-22 → 2019-02-22 · 4 obs
● 2019-02-22 01:36:58
○ 2026-04-14 21:55:12
○ 2026-05-12 03:10:08
○MXlocalhost2016-12-22 → 2016-12-22 · 4 obs
● 2016-12-22 14:33:26
○ 2019-02-22 01:36:58
○ 2026-05-12 03:10:08
●MXmail.coukuan.com2026-04-14 → 2026-05-12 · 3 obs
● 2026-04-14 21:55:12
● 2026-05-12 03:10:08
○MXmail.nickstel.com2015-05-31 → 2016-04-25 · 4 obs
● 2016-04-25 05:17:28
○ 2016-12-22 14:33:26
○ 2026-05-12 03:10:08
○A72.52.4.912015-05-31 → 2016-12-22 · 4 obs
● 2016-12-22 14:33:26
○ 2019-02-22 01:36:58
○ 2026-05-12 03:10:08
○CNAMEcs.wangxin.com2019-02-22 → 2019-02-22 · 3 obs
○ 2026-04-14 21:55:12
○ 2026-05-12 03:10:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| coukuan.com | dns25.hichina.com, dns26.hichina.com | 18 records |
✅ Authoritative Response
Server:120.76.107.37
NS records: dns25.hichina.com, dns26.hichina.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coukuan.com (unsigned zone)
⏱️ Timing
Total: 605ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | dns25.hichina.com, dns26.hichina.com |
| MX | 1 | mail.coukuan.com (pri: 10) |
| SOA | 1 | dns25.hichina.com hostmaster.hichina.com |
📌 Glue Records Collected
Total: 18
Out-of-bailiwick: 18 (dns25.hichina.com, dns25.hichina.com, dns25.hichina.com...)
Analysis
Hierarchy
coukuan.com is the parent of mail.coukuan.com.
Name Servers
coukuan.com is delegated to two name servers dns25.hichina.com and dns26.hichina.com.
coukuan.com shares the same name server setup as other domains, for instance ccy.net, ssyg520.com, wio.cn, tfobe.com and 0ja.cn.
coukuan.com at least partially shares name servers with other domains, for instance hangzhoulandun.com, nkfgcsb.cn, lsf999.com, lanpor.cn and eqji.com.
these name servers are often used together with expirens3.hichina.com, expirens4.hichina.com, dns31.hichina.com and dns32.hichina.com.
Host names with nine IP numbers:
dns25.hichina.com points to: 2408:4009:501::33, 39.96.153.39, 39.96.153.59, 47.118.199.199, 47.118.199.219, 120.76.107.39, 120.76.107.59, 139.224.142.99 and 139.224.142.109.
dns26.hichina.com points to: 2408:4009:501::34, 39.96.153.37, 39.96.153.62, 47.118.199.197, 47.118.199.221, 120.76.107.37, 120.76.107.62, 139.224.142.102 and 139.224.142.107.
Mail Servers
coukuan.com is handled by a single mail server, mail.coukuan.com.
mail.coukuan.com resolves to IP 49.51.242.15.