`bydb.com.cn`

DNSSEC	⚠️ Not signed
A	121.199.2.182^{🇨🇳 Alibaba-Cloud121.199.0.0/16}
NS	`dns27.hichina.com` ⭐
		A	2408:4009:501::35^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.39^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.59^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.199^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.219^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.39^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.59^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.99^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.109^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
NS	`dns28.hichina.com`
		A	2408:4009:501::36^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.37^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.62^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.197^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.221^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.37^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.62^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.102^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.107^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
MX	`mxbiz1.qq.com` ⭐
MX	`mxbiz2.qq.com`⁽¹⁰⁾
TXT	`v=spf1 include:spf.mail.qq.com ~all`
SOA	`dns27.hichina.com`hostmaster@hichina.com 2026-01-12 #9

`com.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=2030532792

rank #472352 globally
rank #7746 in the tld
WOT: NOT_SAFE (20/100)

Same first word

bydb.com

bydb.org

bydb.com.cn

Similar names

dbby.cn

dybb.net

bbdy.com

bdyb.de

bdby.de

ybbd.com

bdby.net

bybd.com

bbyd.eu

dybb.cn

bdby.org

ybdb.net

bdby.com

ybdb.com

dbby.com

dbyb.org

bdyb.cn

bdyb.org

dbyb.net

bbyd.net

ydbb.com

bbdy.net

bdby.mobi

dybb.com

dybb.co.kr

ybdb.io

DNS History

8 records (5 active, 3 former)

●NSdns27.hichina.com2026-02-22 → 2026-04-24 · 3 obs

○ 2019-01-14 12:42:46
● 2026-02-22 03:42:12
● 2026-04-24 22:40:22

●NSdns28.hichina.com2026-02-22 → 2026-04-24 · 3 obs

○ 2019-01-14 12:42:46
● 2026-02-22 03:42:12
● 2026-04-24 22:40:22

○NSns1.sfn.cn2015-06-18 → 2019-01-14 · 4 obs

● 2015-06-18 10:40:10
● 2019-01-14 12:42:46
○ 2026-02-22 03:42:12
○ 2026-04-24 22:40:22

○NSns2.sfn.cn2015-06-18 → 2017-01-18 · 4 obs

● 2015-06-18 10:40:10
● 2017-01-18 03:29:30
○ 2026-02-22 03:42:12
○ 2026-04-24 22:40:22

●MXmxbiz1.qq.com2019-01-14 → 2026-04-24 · 2 obs

● 2019-01-14 12:42:46
● 2026-04-24 22:40:22

●MXmxbiz2.qq.com2019-01-14 → 2026-04-24 · 2 obs

● 2019-01-14 12:42:46
● 2026-04-24 22:40:22

●A121.199.2.1822015-10-31 → 2026-04-24 · 3 obs

○ 2015-06-18 10:40:10
● 2015-10-31 04:59:32
● 2026-04-24 22:40:22

○A121.43.152.1362015-06-18 → 2015-06-18 · 3 obs

● 2015-06-18 10:40:10
○ 2015-10-31 04:59:32
○ 2026-04-24 22:40:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	c.dns.cn, e.dns.cn, b.dns.cn, a.dns.cn...	-
bydb.com.cn	dns27.hichina.com, dns28.hichina.com	-

✅ Authoritative Response

Server:47.118.199.219

NS records: dns27.hichina.com, dns28.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for bydb.com.cn (unsigned zone)

⏱️ Timing

Total: 1461ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`121.199.2.182`
NS	2	`dns28.hichina.com, dns27.hichina.com`
MX	2	`mxbiz2.qq.com (pri: 10), mxbiz1.qq.com (pri: 5)`
TXT	1	`v=spf1 include:spf.mail.qq.com ~all`
SOA	1	`dns27.hichina.com hostmaster.hichina.com`

Analysis

IP Addresses

bydb.com.cn resolves to one IP number: 121.199.2.182.

Name Servers

bydb.com.cn's delegation uses two name servers: dns27.hichina.com and dns28.hichina.com.

bydb.com.cn uses the same name server setup as other domains, such as hpcfo.cn, wangvei.com, pinpaijiameng.com, feiyaowuliaofa.com and fengunion.com.

bydb.com.cn shares name servers with other domains at least partially, for example yyymmm.com and cmed.org.cn.

Host names with nine IP numbers: The host name dns27.hichina.com points to 2408:4009:501::35, 39.96.153.39, 39.96.153.59, 47.118.199.199, 47.118.199.219, 120.76.107.39, 120.76.107.59, 139.224.142.99 and 139.224.142.109. The host name dns28.hichina.com points to 2408:4009:501::36, 39.96.153.37, 39.96.153.62, 47.118.199.197, 47.118.199.221, 120.76.107.37, 120.76.107.62, 139.224.142.102 and 139.224.142.107.

Mail Servers

bydb.com.cn is served by two mail servers mxbiz1.qq.com and mxbiz2.qq.com.

bydb.com.cn shares the same mail server setup as other domains, for instance liangkee.com, nbhongtai.cn, xatihealth.com, maxasia.com and czdeya.com.

bydb.com.cn shares some mail servers with other domains, for instance suphu.com, qytgzs.com, zhuake.com and rolor.com.cn.

bydb.com.cn - robtex.com

bydb.com.cn

com.cn