`chembook.cn`

DNSSEC	⚠️ Not signed
A	154.39.124.208^{🇺🇸 NEBULA154.39.112.0/20 STARCLOUD GLOBAL PTE.LTD}
NS	`a.share-dns.com` ⭐
		A	172.64.53.25^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`b.share-dns.net`
		A	172.64.52.239^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
SOA	`a.share-dns.com`master@share-dns.com serial=1775232520

`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.cn`root@cnnic.cn serial=2034663707

Same first word

chembook.net

chembook.org

chembook.cn

chembook.com.cn

Similar names

mechbook.com

chmebook.com

DNS History

8 records (3 active, 5 former)

○NS(root)2015-06-17 → 2020-01-26 · 4 obs

● 2015-06-17 19:59:36
● 2020-01-26 23:07:26
○ 2026-03-20 10:00:46
○ 2026-04-12 22:13:06

●NSa.share-dns.com2026-03-20 → 2026-04-12 · 3 obs

○ 2020-01-26 23:07:26
● 2026-03-20 10:00:46
● 2026-04-12 22:13:06

●NSb.share-dns.net2026-03-20 → 2026-04-12 · 3 obs

○ 2020-01-26 23:07:26
● 2026-03-20 10:00:46
● 2026-04-12 22:13:06

○A127.0.0.12015-06-17 → 2016-07-15 · 4 obs

● 2015-06-17 19:59:36
● 2016-07-15 04:54:28
○ 2017-03-25 21:19:48
○ 2026-04-12 22:13:06

○A14.17.120.172020-01-26 → 2020-01-26 · 4 obs

○ 2017-03-25 21:19:48
● 2020-01-26 23:07:26
○ 2026-03-20 10:00:46
○ 2026-04-12 22:13:06

●A154.39.124.2082026-04-12 → 2026-04-12 · 2 obs

○ 2026-03-20 10:00:46
● 2026-04-12 22:13:06

○A156.250.218.1532026-03-20 → 2026-03-20 · 3 obs

○ 2020-01-26 23:07:26
● 2026-03-20 10:00:46
○ 2026-04-12 22:13:06

○A58.67.220.1342017-03-25 → 2017-03-25 · 4 obs

○ 2016-07-15 04:54:28
● 2017-03-25 21:19:48
○ 2020-01-26 23:07:26
○ 2026-04-12 22:13:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	b.dns.cn, d.dns.cn, a.dns.cn, e.dns.cn...	-
chembook.cn	a.share-dns.com, b.share-dns.net	-

✅ Authoritative Response

Server:172.64.53.25

NS records: a.share-dns.com, b.share-dns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for chembook.cn (unsigned zone)

⏱️ Timing

Total: 267ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`154.39.124.208`
NS	2	`a.share-dns.com, b.share-dns.net`
SOA	1	`a.share-dns.com master.share-dns.com`

Analysis

IP Addresses

chembook.cn points to a single IP number: 154.39.124.208.

Name Servers

chembook.cn is delegated to two name servers: a.share-dns.com and b.share-dns.net.

chembook.cn shares the same name server setup as other domains, for example e699hh.com, yiluohan.com, lequ3.com, zqrose.com and jiuximo.com.

chembook.cn at least partially shares name servers with other domains, for instance kem689.com, dotsflowers.com, czzpwz.com, charmcom.com and 027y.com.

These name servers are often used together with the name servers a3.share-dns.com, b3.share-dns.net, a11.share-dns.com, b11.share-dns.net, a1.share-dns.com, b1.share-dns.net, ns1.gname-dns.com, ns2.gname-dns.com, a9.share-dns.com and b9.share-dns.net.

Host names with one IP number:

The host a.share-dns.com points to 172.64.53.25 and the host b.share-dns.net points to 172.64.52.239.

chembook.cn - robtex.com

chembook.cn

cn