`docbook.com.cn`

DNSSEC	⚠️ Not signed
A	123.57.47.49^{🇨🇳 Alibaba-Cloud123.57.0.0/16 Alibaba (US) Technology Co., Ltd.}
NS	`vip3.alidns.com` ⭐
		A	2408:4009:500::3^{🇨🇳 Alibaba-Cloud2408:4009:500::/48 Alibaba Group}
		A	8.212.93.3^{🇭🇰 Alibaba_Cloud_SEC8.212.93.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	140.205.1.5^{🇨🇳 Alibaba-Cloud140.205.1.0/24 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	170.33.32.210^{🇸🇬 Alibaba_Cloud_SEC170.33.32.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.40.136^{🇸🇬 Alibaba_Cloud_SEC170.33.40.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.73.26^{🇸🇬 Alibaba_Cloud_SEC170.33.73.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.80.10^{🇸🇬 Alibaba_Cloud_SEC170.33.80.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
NS	`vip4.alidns.com`
		A	2408:4009:500::4^{🇨🇳 Alibaba-Cloud2408:4009:500::/48 Alibaba Group}
		A	8.212.93.4^{🇭🇰 Alibaba_Cloud_SEC8.212.93.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	140.205.1.6^{🇨🇳 Alibaba-Cloud140.205.1.0/24 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	170.33.32.211^{🇸🇬 Alibaba_Cloud_SEC170.33.32.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.40.137^{🇸🇬 Alibaba_Cloud_SEC170.33.40.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.73.27^{🇸🇬 Alibaba_Cloud_SEC170.33.73.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
		A	170.33.80.11^{🇸🇬 Alibaba_Cloud_SEC170.33.80.0/24 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
MX	`mx1.qiye.aliyun.com` ⭐
		A	47.246.146.58^{🇺🇸 Alibaba-Cloud47.246.146.0/24 Alibaba Cloud}
MX	`mx2.qiye.aliyun.com`⁽¹⁰⁾
		A	47.246.146.255^{🇺🇸 Alibaba-Cloud47.246.146.0/24 Alibaba Cloud}
MX	`mx3.qiye.aliyun.com`⁽¹⁵⁾
		A	47.246.146.58^{🇺🇸 Alibaba-Cloud47.246.146.0/24 Alibaba Cloud}
		A	47.246.146.255^{🇺🇸 Alibaba-Cloud47.246.146.0/24 Alibaba Cloud}
TXT	`v=spf1 include:spf.qiye.aliyun.com -all`
TXT	`123.56.0.164`
SOA	`vip3.alidns.com`hostmaster@hichina.com 2026-01-07 #16

`com.cn`

	DNSSEC	🔒 Signed (DS record present)
	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.cn`root@cnnic.cn serial=2030422549

WOT: NOT_SAFE (20/100)

Subdomains

iv2.docbook.com.cn

Same first word

docbook.github.io

docbook.com

docbook.in

docbook.co.uk

docbook.eu

docbook.to

docbook.org

docbook.ro

docbook.ca

docbook.net

docbook.com.cn

docbook.at

docbook.com.au

docbook.cz

docbook.de

docbook.be

Similar names

bookcod.com

bookdoc.net

codbook.com

ocdbook.com

bookdoc.com

DNS History

11 records (6 active, 5 former)

○NSdns17.hichina.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:02:36
○ 2026-02-14 20:57:22
○ 2026-03-12 04:56:44

○NSdns18.hichina.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:02:36
○ 2026-02-14 20:57:22
○ 2026-03-12 04:56:44

●NSvip3.alidns.com2026-02-14 → 2026-03-12 · 3 obs

○ 2016-12-05 01:02:36
● 2026-02-14 20:57:22
● 2026-03-12 04:56:44

●NSvip4.alidns.com2026-02-14 → 2026-03-12 · 3 obs

○ 2016-12-05 01:02:36
● 2026-02-14 20:57:22
● 2026-03-12 04:56:44

●MXmx1.qiye.aliyun.com2026-02-14 → 2026-03-12 · 3 obs

○ 2016-12-05 01:02:36
● 2026-02-14 20:57:22
● 2026-03-12 04:56:44

●MXmx2.qiye.aliyun.com2026-02-14 → 2026-03-12 · 3 obs

○ 2016-12-05 01:02:36
● 2026-02-14 20:57:22
● 2026-03-12 04:56:44

●MXmx3.qiye.aliyun.com2026-02-14 → 2026-03-12 · 3 obs

○ 2016-12-05 01:02:36
● 2026-02-14 20:57:22
● 2026-03-12 04:56:44

○MXmxn.mxhichina.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:02:36
○ 2026-02-14 20:57:22
○ 2026-03-12 04:56:44

○MXmxw.mxhichina.com2016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:02:36
○ 2026-02-14 20:57:22
○ 2026-03-12 04:56:44

○A123.57.22.2022016-12-05 → 2016-12-05 · 3 obs

● 2016-12-05 01:02:36
○ 2026-02-14 20:57:22
○ 2026-03-12 04:56:44

●A123.57.47.492026-02-14 → 2026-03-12 · 3 obs

○ 2016-12-05 01:02:36
● 2026-02-14 20:57:22
● 2026-03-12 04:56:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	e.dns.cn, c.dns.cn, b.dns.cn, a.dns.cn...	11 records
docbook.com.cn	vip3.alidns.com, vip4.alidns.com	-

✅ Authoritative Response

Server: 170.33.80.11

NS records: vip3.alidns.com, vip4.alidns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for docbook.com.cn (unsigned zone)

⏱️ Timing

Total: 4319ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`123.57.47.49`
NS	2	`vip4.alidns.com, vip3.alidns.com`
MX	3	`mx1.qiye.aliyun.com (pri: 5), mx3.qiye.aliyun.com (pri: 15)...`
TXT	2	`123.56.0.164, v=spf1 include:spf.qiye.aliyun.com -all`
SOA	1	`vip3.alidns.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 11

In-bailiwick: 10 (e.dns.cn, d.dns.cn, c.dns.cn...)

Out-of-bailiwick: 1 (ns.cernet.net)

Analysis

Hierarchy

docbook.com.cn is a parent of iv2.docbook.com.cn.

IP Addresses

docbook.com.cn points to a single IP address: 123.57.47.49.

Name Servers

docbook.com.cn is delegated to two name servers: vip3.alidns.com and vip4.alidns.com.

docbook.com.cn uses the same name server setup as other domains, including fodexin.com, hahabianli.com, microfun.cn, dhjx.com.tw and sicbj.com.

At least part of the name servers for docbook.com.cn are shared with other domains, for instance cloudp.cc, mcwzg.com, elionpay.com.cn, htx8881388.com and qdlpay.com.

These name servers are commonly used with vip1.alidns.com, vip2.alidns.com, ns3.dnsv5.com and ns4.dnsv5.com.

Host names with seven IP numbers: The host name vip3.alidns.com points to: 2408:4009:500::3, 8.212.93.3, 140.205.1.5, 170.33.32.210, 170.33.40.136, 170.33.73.26 and 170.33.80.10. The host name vip4.alidns.com points to: 2408:4009:500::4, 8.212.93.4, 140.205.1.6, 170.33.32.211, 170.33.40.137, 170.33.73.27 and 170.33.80.11.

Mail Servers

Three mail servers handle docbook.com.cn: mx1.qiye.aliyun.com, mx2.qiye.aliyun.com and mx3.qiye.aliyun.com.

docbook.com.cn shares at least some mail servers with other domains, for example external-array.com.cn, huajunhunter.com, petory.net, huafoodmachine.com and gbpower.net.

Host names with two IP numbers: The host name mx3.qiye.aliyun.com points to 47.246.146.58 and 47.246.146.255.

Host names with one IP number: The host name mx1.qiye.aliyun.com points to 47.246.146.58. The host name mx2.qiye.aliyun.com points to 47.246.146.255.

Host names that point to 47.246.146.58: mx3.qiye.aliyun.com and mx1.qiye.aliyun.com.

Host names that point to 47.246.146.255: mx3.qiye.aliyun.com and mx2.qiye.aliyun.com.

docbook.com.cn - robtex.com

docbook.com.cn

com.cn

Subdomains

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

Hierarchy

IP Addresses

Name Servers

Mail Servers

`docbook.com.cn`

`com.cn`