ntdu.cn - robtex.com
ntdu.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 156.253.126.149🇿🇦 HKIDC-AS-AP156.253.64.0/18 AresIDC Limited | ||||||
| NS | ns1.nowcndns.com ⭐ | ||||||
| A | 1.193.216.204🇨🇳 CHINANET-Henan-Luoyang-IDC1.193.216.0/24 Chinatelecom HeNan Province Network | ||||||
| A | 218.98.111.129🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED | ||||||
| A | 218.98.111.138🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED | ||||||
| NS | ns2.nowcndns.com | ||||||
| A | 61.158.128.11🇨🇳 CHINA169-Backbone61.158.128.0/17 CNC Group CHINA169 Henan Province Network | ||||||
| PTR | 11.128.158.61.ha.cnc | ||||||
| A | 183.253.57.202🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route) | ||||||
| A | 211.99.99.38🇨🇳 DONGGUAN-1211.99.99.0/24 Proxy-registered route object | ||||||
| SOA | ns1.nowcndns.comadmin@nowcndns.com serial=1764491121 | ||||||
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=2034582967 | ||||||
Same first word
ntdu.cn |
Similar names
DNS History
10 records (3 active, 7 former)
●NSns1.nowcndns.com2026-03-15 → 2026-03-24 · 3 obs
○ 2016-09-19 07:41:50
● 2026-03-15 08:10:30
● 2026-03-24 20:57:22
● 2026-03-15 08:10:30
● 2026-03-24 20:57:22
●NSns2.nowcndns.com2026-03-15 → 2026-03-24 · 3 obs
○ 2016-09-19 07:41:50
● 2026-03-15 08:10:30
● 2026-03-24 20:57:22
● 2026-03-15 08:10:30
● 2026-03-24 20:57:22
○NSwww.ntdu.cn2015-10-20 → 2016-09-19 · 4 obs
● 2015-10-20 11:12:08
● 2016-09-19 07:41:50
○ 2026-03-15 08:10:30
○ 2026-03-24 20:57:22
● 2016-09-19 07:41:50
○ 2026-03-15 08:10:30
○ 2026-03-24 20:57:22
○MXio.bouncemx.com2015-10-20 → 2016-09-19 · 4 obs
● 2015-10-20 11:12:08
● 2016-09-19 07:41:50
○ 2026-03-15 08:10:30
○ 2026-03-24 20:57:22
● 2016-09-19 07:41:50
○ 2026-03-15 08:10:30
○ 2026-03-24 20:57:22
●A156.253.126.1492026-03-15 → 2026-03-24 · 3 obs
○ 2016-09-19 07:41:50
● 2026-03-15 08:10:30
● 2026-03-24 20:57:22
● 2026-03-15 08:10:30
● 2026-03-24 20:57:22
○A70.39.84.2312015-10-20 → 2015-10-20 · 3 obs
● 2015-10-20 11:12:08
○ 2015-12-23 06:52:30
○ 2026-03-24 20:57:22
○ 2015-12-23 06:52:30
○ 2026-03-24 20:57:22
○A70.39.84.2352015-12-23 → 2015-12-23 · 4 obs
○ 2015-10-20 11:12:08
● 2015-12-23 06:52:30
○ 2016-03-28 12:36:42
○ 2026-03-24 20:57:22
● 2015-12-23 06:52:30
○ 2016-03-28 12:36:42
○ 2026-03-24 20:57:22
○A70.39.84.2442016-03-28 → 2016-03-28 · 4 obs
○ 2015-12-23 06:52:30
● 2016-03-28 12:36:42
○ 2016-09-19 07:41:50
○ 2026-03-24 20:57:22
● 2016-03-28 12:36:42
○ 2016-09-19 07:41:50
○ 2026-03-24 20:57:22
○A70.39.84.2452016-09-19 → 2016-09-19 · 4 obs
○ 2016-03-28 12:36:42
● 2016-09-19 07:41:50
○ 2026-03-15 08:10:30
○ 2026-03-24 20:57:22
● 2016-09-19 07:41:50
○ 2026-03-15 08:10:30
○ 2026-03-24 20:57:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | c.dns.cn, a.dns.cn, e.dns.cn, b.dns.cn... | - |
| ntdu.cn | ns1.nowcndns.com, ns2.nowcndns.com | - |
✅ Authoritative Response
Server:211.99.99.38
NS records: ns1.nowcndns.com, ns2.nowcndns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ntdu.cn (unsigned zone)
⏱️ Timing
Total: 729ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 156.253.126.149 |
| NS | 2 | ns1.nowcndns.com, ns2.nowcndns.com |
| SOA | 1 | ns1.nowcndns.com admin.nowcndns.com |
Analysis
IP Addresses
ntdu.cn points to a single IP: 156.253.126.149.
Other host names, for instance bond360.cn, share IP numbers with ntdu.cn.
Name Servers
ntdu.cn's delegation is to two name servers ns1.nowcndns.com and ns2.nowcndns.com.
ntdu.cn shares the same name server configuration as other domains, such as wlxmd.cn, szdl8.cn, flpvideo.com.cn, 001digi.com.cn and xhlskj.cn.
Host names with three IP numbers
The host name ns1.nowcndns.com points to 1.193.216.204, 218.98.111.129 and 218.98.111.138; the host name ns2.nowcndns.com points to 61.158.128.11, 183.253.57.202 and 211.99.99.38