b21743.cn - robtex.com
b21743.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 38.173.225.249🇺🇸 AS39847838.173.224.0/19 PEG TECH INC | ||||||
| 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=1773206541 | ||||||
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=2034674390 | ||||||
Same first word
b21743.cn |
Similar names
DNS History
3 records (3 active, 0 former)
●NSns1.nowcndns.com2026-03-11 → 2026-04-15 · 2 obs
● 2026-04-15 20:25:32
●NSns2.nowcndns.com2026-03-11 → 2026-04-15 · 2 obs
● 2026-04-15 20:25:32
●A38.173.225.2492026-03-11 → 2026-04-15 · 2 obs
● 2026-04-15 20:25:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, e.dns.cn, d.dns.cn, c.dns.cn... | - |
| b21743.cn | ns1.nowcndns.com, ns2.nowcndns.com | - |
✅ Authoritative Response
Server:61.158.128.11
NS records: ns1.nowcndns.com, ns2.nowcndns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for b21743.cn (unsigned zone)
⏱️ Timing
Total: 4626ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 38.173.225.249 |
| NS | 2 | ns1.nowcndns.com, ns2.nowcndns.com |
| SOA | 1 | ns1.nowcndns.com admin.nowcndns.com |
Analysis
IP Addresses
b21743.cn points to a single IP: 38.173.225.249.
Other host names, for instance tsheng.net.cn, e5461.cn, fa3.com.cn, x9443.cn and lw909.cn share IP numbers with b21743.cn.
Name Servers
b21743.cn's delegation is to two name servers ns1.nowcndns.com and ns2.nowcndns.com.
b21743.cn shares the same name server configuration as other domains, such as gzslan.cn, shooton.cn, zbkcyl.cn, lqdnd.cn and maicen.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