`library.ac.cn`

DNSSEC	⚠️ Not signed
NS	`jm1.dns.com` ⚠️ Not in zone NS records
		A	218.98.111.214^{🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED}
NS	`jm2.dns.com` ⚠️ Not in zone NS records
		A	183.253.57.200^{🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route)}
		A	211.99.99.50^{🇨🇳 DONGGUAN-1211.99.99.0/24 Proxy-registered route object}

`ac.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.cn`root@cnnic.cn serial=2027269994

WOT: SAFE (94/100)

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Similar names

DNS History

2 records (2 active, 0 former)

●NSjm1.dns.com2026-05-30 → 2026-06-05 · 2 obs

● 2026-05-30 11:50:36
● 2026-06-05 14:46:04

●NSjm2.dns.com2026-05-30 → 2026-06-05 · 2 obs

● 2026-05-30 11:50:36
● 2026-06-05 14:46:04

🔍 DNS Trace

Analysis

Name Servers

library.ac.cn is served by two delegated name servers, jm1.dns.com and jm2.dns.com.

The name server configuration of library.ac.cn is shared with other domains, for instance wdcm.com.cn, 15397.com, yue1.cn and two others.

There is at least partial name server overlap between library.ac.cn and other domains — 2005bet.com, bob436.com, 472bet.com and two more among them.

These name servers frequently co-occur with the name servers ns1.judns.com and ns2.judns.com.

Host names pointing to two IP addresses:

jm2.dns.com maps to two IP addresses — 183.253.57.200 and 211.99.99.50.

Host names with one IP number:

jm1.dns.com points to the IP address 218.98.111.214.

library.ac.cn - robtex.com

library.ac.cn

ac.cn