21cm.com.cn - robtex.com
21cm.com.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 201.5.209.41 | ||||||
| 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=1770206704 | ||||||
com.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a.dns.cn ⭐ ⚠️ Not in parent delegation | ||||||
| NS | b.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | c.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | cns.cernet.net ⚠️ Not in parent delegation | ||||||
| NS | d.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | e.dns.cn ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.cnroot@cnnic.cn serial=2030510641 | ||||||
Same first word
Similar names
DNS History
8 records (3 active, 5 former)
○NSjm1.dns.com2020-03-12 → 2020-03-12 · 3 obs
● 2020-03-12 14:06:56
○ 2026-03-27 09:42:36
○ 2026-04-12 10:07:38
○ 2026-03-27 09:42:36
○ 2026-04-12 10:07:38
○NSjm2.dns.com2020-03-12 → 2020-03-12 · 3 obs
● 2020-03-12 14:06:56
○ 2026-03-27 09:42:36
○ 2026-04-12 10:07:38
○ 2026-03-27 09:42:36
○ 2026-04-12 10:07:38
●NSns1.nowcndns.com2026-03-27 → 2026-04-12 · 3 obs
○ 2020-03-12 14:06:56
● 2026-03-27 09:42:36
● 2026-04-12 10:07:38
● 2026-03-27 09:42:36
● 2026-04-12 10:07:38
●NSns2.nowcndns.com2026-03-27 → 2026-04-12 · 3 obs
○ 2020-03-12 14:06:56
● 2026-03-27 09:42:36
● 2026-04-12 10:07:38
● 2026-03-27 09:42:36
● 2026-04-12 10:07:38
○A113.10.190.2032015-08-21 → 2016-07-02 · 4 obs
● 2015-08-21 20:29:34
● 2016-07-02 17:29:14
○ 2017-03-26 06:35:32
○ 2026-04-12 10:07:38
● 2016-07-02 17:29:14
○ 2017-03-26 06:35:32
○ 2026-04-12 10:07:38
●A201.5.209.412026-03-27 → 2026-04-12 · 3 obs
○ 2020-03-12 14:06:56
● 2026-03-27 09:42:36
● 2026-04-12 10:07:38
● 2026-03-27 09:42:36
● 2026-04-12 10:07:38
○A45.39.215.2292020-03-12 → 2020-03-12 · 4 obs
○ 2017-03-26 06:35:32
● 2020-03-12 14:06:56
○ 2026-03-27 09:42:36
○ 2026-04-12 10:07:38
● 2020-03-12 14:06:56
○ 2026-03-27 09:42:36
○ 2026-04-12 10:07:38
○A47.88.8.2332017-03-26 → 2017-03-26 · 4 obs
○ 2016-07-02 17:29:14
● 2017-03-26 06:35:32
○ 2020-03-12 14:06:56
○ 2026-04-12 10:07:38
● 2017-03-26 06:35:32
○ 2020-03-12 14:06:56
○ 2026-04-12 10:07:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| 21cm.com.cn | ns1.nowcndns.com, ns2.nowcndns.com | - |
✅ Authoritative Response
Server:218.98.111.129
NS records: ns1.nowcndns.com, ns2.nowcndns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21cm.com.cn (unsigned zone)
⏱️ Timing
Total: 1577ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 201.5.209.41 |
| NS | 2 | ns1.nowcndns.com, ns2.nowcndns.com |
| SOA | 1 | ns1.nowcndns.com admin.nowcndns.com |
Analysis
IP Addresses
21cm.com.cn points to IP number: 201.5.209.41.
Other host names, for instance krbo.cn share IP numbers with 21cm.com.cn.
Name Servers
21cm.com.cn is delegated to two name servers: ns1.nowcndns.com and ns2.nowcndns.com.
21cm.com.cn shares the same name server setup as giantbicycle.com.cn, djyechun.cn, cjyd.com.cn, littz.cn and tnb365.cn.
Host names with three IP numbers: ns1.nowcndns.com points to 1.193.216.204, 218.98.111.129 and 218.98.111.138; ns2.nowcndns.com points to 61.158.128.11, 183.253.57.202 and 211.99.99.38.