`720ybf.cn`

DNSSEC	⚠️ Not signed
NS	`dm1.longmingdns.com` ⭐
		A	218.98.111.163^{🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED}
NS	`dm2.longmingdns.com`
		A	183.253.57.197^{🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route)}
		A	211.99.99.56^{🇨🇳 DONGGUAN-1211.99.99.0/24 Proxy-registered route object}
SOA	`dm1.longmingdns.com`dnsadmin@longmingdns.com serial=1781105591

`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=2035005108

Same first word

720ybf.com

720ybf.cn

DNS History

3 records (2 active, 1 former)

●NSdm1.longmingdns.com2026-06-04 → 2026-07-05 · 2 obs

● 2026-06-04 03:33:36
● 2026-07-05 10:15:12

●NSdm2.longmingdns.com2026-06-04 → 2026-07-05 · 2 obs

● 2026-06-04 03:33:36
● 2026-07-05 10:15:12

○A154.212.66.1342026-06-04 → 2026-06-04 · 2 obs

● 2026-06-04 03:33:36
○ 2026-07-05 10:15:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
720ybf.cn	dm1.longmingdns.com, dm2.longmingdns.com	-

✅ Authoritative Response

Server:218.98.111.163

NS records: dm1.longmingdns.com, dm2.longmingdns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 720ybf.cn (unsigned zone)

⏱️ Timing

Total: 1634ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dm1.longmingdns.com, dm2.longmingdns.com`
SOA	1	`dm1.longmingdns.com dnsadmin.longmingdns`

Analysis

Name Servers

Two name servers handle the delegation for 720ybf.cn: dm1.longmingdns.com and dm2.longmingdns.com.

The name server configuration of 720ybf.cn is shared with other domains, for instance 07cm.cn, dashixiaoqing.cn, shuangfengli.cn and two others.

Host names pointing to two IP addresses:

dm2.longmingdns.com resolves to two addresses: 183.253.57.197 and 211.99.99.56.

Host names resolving to a single IP address:

The hostname dm1.longmingdns.com resolves to 218.98.111.163.

720ybf.cn - robtex.com

720ybf.cn

cn