chembook.com.cn - robtex.com
chembook.com.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 201.5.178.219 | ||||||
| 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=1775595614 | ||||||
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
10 records (3 active, 7 former)
○NSns1.dns-diy.com2008-11-27 → 2008-11-27 · 3 obs
● 2008-11-27 20:22:18
○ 2015-10-14 21:39:24
○ 2026-04-12 10:08:00
○ 2015-10-14 21:39:24
○ 2026-04-12 10:08:00
●NSns1.nowcndns.com2026-04-12 → 2026-04-12 · 3 obs
○ 2020-03-07 15:13:20
● 2026-04-12 10:07:56
● 2026-04-12 10:08:00
● 2026-04-12 10:07:56
● 2026-04-12 10:08:00
○NSns2.dns-diy.com2008-11-27 → 2008-11-27 · 3 obs
● 2008-11-27 20:22:18
○ 2015-10-14 21:39:24
○ 2026-04-12 10:08:00
○ 2015-10-14 21:39:24
○ 2026-04-12 10:08:00
●NSns2.nowcndns.com2026-04-12 → 2026-04-12 · 3 obs
○ 2020-03-07 15:13:20
● 2026-04-12 10:07:56
● 2026-04-12 10:08:00
● 2026-04-12 10:07:56
● 2026-04-12 10:08:00
○NSns4.dnsdun.com2020-03-07 → 2020-03-07 · 4 obs
○ 2015-10-14 21:39:24
● 2020-03-07 15:13:20
○ 2026-04-12 10:07:56
○ 2026-04-12 10:08:00
● 2020-03-07 15:13:20
○ 2026-04-12 10:07:56
○ 2026-04-12 10:08:00
○NSns4.dnsdun.net2020-03-07 → 2020-03-07 · 4 obs
○ 2015-10-14 21:39:24
● 2020-03-07 15:13:20
○ 2026-04-12 10:07:56
○ 2026-04-12 10:08:00
● 2020-03-07 15:13:20
○ 2026-04-12 10:07:56
○ 2026-04-12 10:08:00
○A104.253.84.732020-03-07 → 2020-03-07 · 4 obs
○ 2015-10-14 21:39:24
● 2020-03-07 15:13:20
○ 2026-04-12 10:07:56
○ 2026-04-12 10:08:00
● 2020-03-07 15:13:20
○ 2026-04-12 10:07:56
○ 2026-04-12 10:08:00
○A154.215.200.592026-04-12 → 2026-04-12 · 2 obs
○ 2026-04-12 10:07:56
○ 2026-04-12 10:08:00
○ 2026-04-12 10:08:00
●A201.5.178.2192026-04-12 → 2026-04-12 · 3 obs
○ 2020-03-07 15:13:20
● 2026-04-12 10:07:56
● 2026-04-12 10:08:00
● 2026-04-12 10:07:56
● 2026-04-12 10:08:00
○A211.155.27.1232008-11-27 → 2008-11-27 · 3 obs
● 2008-11-27 20:22:18
○ 2015-10-14 21:39:24
○ 2026-04-12 10:08:00
○ 2015-10-14 21:39:24
○ 2026-04-12 10:08:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | e.dns.cn, c.dns.cn, a.dns.cn, d.dns.cn... | - |
| chembook.com.cn | ns1.nowcndns.com, ns2.nowcndns.com | - |
✅ Authoritative Response
Server:218.98.111.138
NS records: ns1.nowcndns.com, ns2.nowcndns.com
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
Validation error at cn: Error: DNS query timeout: 203.119.29.1 for DNSKEY cn
⏱️ Timing
Total: 4052ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 201.5.178.219 |
| NS | 2 | ns1.nowcndns.com, ns2.nowcndns.com |
| SOA | 1 | ns1.nowcndns.com admin.nowcndns.com |
Analysis
IP Addresses
chembook.com.cn points to IP number: 201.5.178.219.
Name Servers
chembook.com.cn is delegated to two name servers: ns1.nowcndns.com and ns2.nowcndns.com.
chembook.com.cn shares the same name server setup as febao.cn, 5kjsq.cn, syxq8.cn, qowbbz.cn and sacheats.com.
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.