`51bbcn.cn`

DNSSEC	⚠️ Not signed
A	177.211.170.4^{🇧🇷 UNSPECIFIED160.0.0.0/3}
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=1774354691

`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=2034715369

Same first word

51bbcn.cn

51bbcn.com

DNS History

12 records (3 active, 9 former)

●NSdm1.longmingdns.com2026-03-18 → 2026-04-26 · 3 obs

○ 2016-12-21 15:20:42
● 2026-03-18 17:39:26
● 2026-04-26 19:46:54

●NSdm2.longmingdns.com2026-03-18 → 2026-04-26 · 3 obs

○ 2016-12-21 15:20:42
● 2026-03-18 17:39:26
● 2026-04-26 19:46:54

○NSdns19.hichina.com2015-08-20 → 2015-11-12 · 4 obs

● 2015-08-20 19:43:48
● 2015-11-12 00:24:42
○ 2015-12-21 13:54:40
○ 2026-04-26 19:46:54

○NSdns20.hichina.com2015-08-20 → 2015-11-12 · 4 obs

● 2015-08-20 19:43:48
● 2015-11-12 00:24:42
○ 2015-12-21 13:54:40
○ 2026-04-26 19:46:54

○NSns1.51dns.com2016-01-12 → 2016-12-21 · 5 obs

○ 2015-12-21 13:54:40
● 2016-01-12 04:47:26
● 2016-12-21 15:20:42
○ 2026-03-18 17:39:26
○ 2026-04-26 19:46:54

○NSns2.51dns.com2016-01-12 → 2016-12-21 · 5 obs

○ 2015-12-21 13:54:40
● 2016-01-12 04:47:26
● 2016-12-21 15:20:42
○ 2026-03-18 17:39:26
○ 2026-04-26 19:46:54

○A122.9.184.1842016-01-12 → 2017-01-04 · 5 obs

○ 2015-12-21 13:54:40
● 2016-01-12 04:47:26
● 2017-01-04 21:34:10
○ 2026-03-18 17:39:26
○ 2026-04-26 19:46:54

○A154.212.90.742026-03-18 → 2026-04-26 · 2 obs

○ 2026-03-18 17:39:26
○ 2026-04-26 19:46:54

○A154.95.205.42026-03-18 → 2026-03-24 · 5 obs

○ 2017-01-04 21:34:10
● 2026-03-18 17:39:26
● 2026-03-24 09:11:14
○ 2026-03-26 16:46:30
○ 2026-04-26 19:46:54

●A177.211.170.42026-03-26 → 2026-04-26 · 3 obs

○ 2026-03-24 09:11:14
● 2026-03-26 16:46:30
● 2026-04-26 19:46:54

○A42.120.158.782015-12-07 → 2015-12-17 · 5 obs

○ 2015-11-12 00:24:42
● 2015-12-07 13:53:46
● 2015-12-17 09:00:00
○ 2015-12-21 13:54:40
○ 2026-04-26 19:46:54

○A98.126.12.522015-08-20 → 2015-11-12 · 4 obs

● 2015-08-20 19:43:48
● 2015-11-12 00:24:42
○ 2015-12-07 13:53:46
○ 2026-04-26 19:46:54

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	b.dns.cn, c.dns.cn, d.dns.cn, e.dns.cn...	-
51bbcn.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 51bbcn.cn (unsigned zone)

⏱️ Timing

Total: 1063ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`177.211.170.4`
NS	2	`dm1.longmingdns.com, dm2.longmingdns.com`
SOA	1	`dm1.longmingdns.com dnsadmin.longmingdns`

Analysis

IP Addresses

51bbcn.cn resolves to one IP number: 177.211.170.4.

other host names including aies.com.cn, 63858782.cn, stemcor.com.cn, gamian.cn and www.63858782.cn share IP numbers with 51bbcn.cn.

Name Servers

51bbcn.cn is delegated to two name servers dm1.longmingdns.com and dm2.longmingdns.com.

51bbcn.cn shares the same name server setup as other domains, for instance liaobe.cn, pzhyh.com.cn, xinxinsp.cn, xdphy.cn and africanqo.cn.

Two IP numbers for a host: dm2.longmingdns.com points to 183.253.57.197 and 211.99.99.56.

One IP number for a host: dm1.longmingdns.com points to 218.98.111.163.

51bbcn.cn - robtex.com

51bbcn.cn

cn