`bt50.cn`

DNSSEC	⚠️ Not signed
A	122.114.21.164^{🇨🇳 CHINA169-Backbone122.114.0.0/16 route of Chinaunicomroute of Chinaunicom}
NS	`a.ezdnscenter.com` ⭐
		A	218.98.111.140^{🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED}
NS	`b.ezdnscenter.com`
		A	183.253.57.210^{🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route)}
		A	211.99.99.58^{🇨🇳 DONGGUAN-1211.99.99.0/24 Proxy-registered route object}
MX	`mx1.chengmail.cn` ⭐
		A	103.143.231.69^{🇭🇰 YISUCLOUDLTD-HK103.143.231.0/24 Hongkong Hongdou Technology Co., Limited FLAT/RM B07 23/F HOVER INDUSTRIAL BUILDING NO.26-38 KWAI CHEONG ROAO, NT}
		A	113.10.158.179^{🇭🇰 HKBNESL-AS-AP113.10.158.0/24 New World Telecommunications Limited Hong Kong Broadband Network Ltd 15/F, Trans Asia Centre 18 Kin Hong Street, Kwai Chung, N.T.}
MX	`mx2.chengmail.cn` ⭐
		A	103.143.231.69^{🇭🇰 YISUCLOUDLTD-HK103.143.231.0/24 Hongkong Hongdou Technology Co., Limited FLAT/RM B07 23/F HOVER INDUSTRIAL BUILDING NO.26-38 KWAI CHEONG ROAO, NT}
		A	113.10.158.179^{🇭🇰 HKBNESL-AS-AP113.10.158.0/24 New World Telecommunications Limited Hong Kong Broadband Network Ltd 15/F, Trans Asia Centre 18 Kin Hong Street, Kwai Chung, N.T.}
TXT	`v=spf1 include:spf.chengmail.cn ~all`
SOA	`a.ezdnscenter.com`dnsadmin@ezdnscenter.com serial=1751342705

`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=2034775248

Same first word

bt50.org

bt50.net

bt50.com.my

bt50.cn

bt50.com.au

Similar names

tb05.com

05tb.com

50bt.com

5bt0.com

tb50.com

DNS History

13 records (5 active, 8 former)

●NSa.ezdnscenter.com2026-04-09 → 2026-05-10 · 3 obs

○ 2017-06-29 02:57:06
● 2026-04-09 21:57:36
● 2026-05-10 16:32:52

●NSb.ezdnscenter.com2026-04-09 → 2026-05-10 · 3 obs

○ 2017-06-29 02:57:06
● 2026-04-09 21:57:36
● 2026-05-10 16:32:52

○NSns1.ezdnscenter.com2015-06-15 → 2017-06-29 · 4 obs

● 2015-06-15 11:58:06
● 2017-06-29 02:57:06
○ 2026-04-09 21:57:36
○ 2026-05-10 16:32:52

○NSns2.ezdnscenter.com2015-06-15 → 2017-06-29 · 4 obs

● 2015-06-15 11:58:06
● 2017-06-29 02:57:06
○ 2026-04-09 21:57:36
○ 2026-05-10 16:32:52

○NSns3.ezdnscenter.com2015-06-15 → 2017-06-29 · 4 obs

● 2015-06-15 11:58:06
● 2017-06-29 02:57:06
○ 2026-04-09 21:57:36
○ 2026-05-10 16:32:52

○NSns4.ezdnscenter.com2015-06-15 → 2017-06-29 · 4 obs

● 2015-06-15 11:58:06
● 2017-06-29 02:57:06
○ 2026-04-09 21:57:36
○ 2026-05-10 16:32:52

○NSns5.ezdnscenter.com2015-06-15 → 2017-06-29 · 4 obs

● 2015-06-15 11:58:06
● 2017-06-29 02:57:06
○ 2026-04-09 21:57:36
○ 2026-05-10 16:32:52

○NSns6.ezdnscenter.com2015-06-15 → 2017-06-29 · 4 obs

● 2015-06-15 11:58:06
● 2017-06-29 02:57:06
○ 2026-04-09 21:57:36
○ 2026-05-10 16:32:52

○MXmail.bt50.cn2015-06-15 → 2017-06-29 · 4 obs

● 2015-06-15 11:58:06
● 2017-06-29 02:57:06
○ 2026-04-09 21:57:36
○ 2026-05-10 16:32:52

●MXmx1.chengmail.cn2026-04-09 → 2026-05-10 · 3 obs

○ 2017-06-29 02:57:06
● 2026-04-09 21:57:36
● 2026-05-10 16:32:52

●MXmx2.chengmail.cn2026-04-09 → 2026-05-10 · 3 obs

○ 2017-06-29 02:57:06
● 2026-04-09 21:57:36
● 2026-05-10 16:32:52

●A122.114.21.1642026-04-09 → 2026-05-10 · 3 obs

○ 2017-06-29 02:57:06
● 2026-04-09 21:57:36
● 2026-05-10 16:32:52

○A210.16.191.2492015-06-15 → 2017-06-29 · 4 obs

● 2015-06-15 11:58:06
● 2017-06-29 02:57:06
○ 2026-04-09 21:57:36
○ 2026-05-10 16:32:52

🔍 DNS Trace

Analysis

IP Addresses

bt50.cn points to a single IP address: 122.114.21.164.

Name Servers

Two name servers a.ezdnscenter.com and b.ezdnscenter.com handle the delegation for bt50.cn.

bt50.cn shares the same name server setup as other domains, for example frbicycle.com, nvivo.cn, nxlb.net, wan-sui.com and 991358.com.

bt50.cn shares name servers with other domains at least partially, for instance loyin.net.

Host names with two IP numbers:

b.ezdnscenter.com points to 183.253.57.210 and 211.99.99.58.

Host names with one IP number:

a.ezdnscenter.com points to 218.98.111.140.

Mail Servers

Two mail servers handle bt50.cn: mx1.chengmail.cn and mx2.chengmail.cn.

bt50.cn shares the same mail server setup as other domains, including pmssh.com, gaiyia.com, vx001.com, busbarmachinery.com and meiboer.com.

bt50.cn shares at least partially some mail servers with other domains, for instance csanyue.com, ddbd.cn, royaltexltd.com, douhaoit.com and hsbs.org.