`justdb.cn`

CNAME	`expired.hichina.com`
DNSSEC	⚠️ Not signed
A	8.218.208.240^{🇭🇰 Alibaba-Cloud8.218.128.0/17 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}
A	47.76.127.217^{🇺🇸 Alibaba-Cloud47.76.0.0/17 Proxy-registered route object}
A	47.91.170.222^{🇭🇰 Alibaba-Cloud47.91.128.0/18 Alibaba Cloud}
NS	`ns1.alidns.com` ⭐ ⚠️ Not in parent delegation
		A	2408:4009:501::1^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.45^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.55^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.205^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.215^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.45^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.55^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.115^{🇨🇳 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	139.224.142.125^{🇨🇳 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	`ns2.alidns.com` ⚠️ Not in parent delegation
		A	2408:4009:501::2^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.46^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.56^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.206^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.216^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.46^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.56^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.116^{🇨🇳 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	139.224.142.126^{🇨🇳 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,}
SOA	`ns1.alidns.com`hostmaster@hichina.com 2026-01-09 #13

`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=2034582900

Subdomains

mail.justdb.cn

Same first word

justdb.cn

Similar names

tbjusd.org

usdtjb.com

dbstuj.com

sjtudb.tech

DNS History

9 records (5 active, 4 former)

●NSdns29.hichina.com2015-08-20 → 2026-03-24 · 2 obs

● 2015-08-20 09:24:56
● 2026-03-24 19:12:50

●NSdns30.hichina.com2015-08-20 → 2026-03-24 · 2 obs

● 2015-08-20 09:24:56
● 2026-03-24 19:12:50

●NSexpirens3.hichina.com2026-03-24 → 2026-03-24 · 3 obs

○ 2015-08-20 09:24:56
● 2026-03-24 19:12:48
● 2026-03-24 19:12:50

●NSexpirens4.hichina.com2026-03-24 → 2026-03-24 · 3 obs

○ 2015-08-20 09:24:56
● 2026-03-24 19:12:48
● 2026-03-24 19:12:50

○MXmail.justdb.cn2015-08-20 → 2026-03-08 · 4 obs

● 2015-08-20 09:24:56
● 2026-03-08 13:02:32
○ 2026-03-24 19:12:48
○ 2026-03-24 19:12:50

○A110.85.4.92019-12-28 → 2026-03-08 · 5 obs

○ 2017-02-17 03:59:52
● 2019-12-28 16:42:36
● 2026-03-08 13:02:32
○ 2026-03-24 19:12:48
○ 2026-03-24 19:12:50

○A27.152.28.812015-08-20 → 2017-02-17 · 6 obs

● 2015-08-20 09:24:56
● 2016-03-11 18:05:12
○ 2016-07-09 03:49:30
● 2017-02-17 03:59:52
○ 2019-12-28 16:42:36
○ 2026-03-24 19:12:50

○A45.113.121.1352016-07-09 → 2016-07-09 · 4 obs

○ 2016-03-11 18:05:12
● 2016-07-09 03:49:30
○ 2017-02-17 03:59:52
○ 2026-03-24 19:12:50

●CNAMEexpired.hichina.com2026-03-24 → 2026-03-24 · 2 obs

● 2026-03-24 19:12:48
● 2026-03-24 19:12:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	d.dns.cn, c.dns.cn, a.dns.cn, b.dns.cn...	-
justdb.cn	expirens3.hichina.com, expirens4.hichina.com	-

✅ Authoritative Response

Server:139.224.142.96

NS records: expirens3.hichina.com, expirens4.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for justdb.cn (unsigned zone)

⏱️ Timing

Total: 2369ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns30.hichina.com, dns29.hichina.com`
CNAME	1	`expired.hichina.com`
SOA	1	`dns29.hichina.com hostmaster.hichina.com`

Analysis

Hierarchy

justdb.cn is the parent of mail.justdb.cn.

IP Addresses

justdb.cn resolves to three IP numbers: 8.218.208.240, 47.76.127.217 and 47.91.170.222.

Other host names share IP numbers with justdb.cn; for instance expired.hichina.com.

Name Servers

justdb.cn has two name servers: ns1.alidns.com and ns2.alidns.com.

justdb.cn shares the same name server setup as other domains, for example aa10c1e8710291.beer, szsoufun.cn, truecheck.cn, 9b124425611042.beer and 5cd592bef1011.beer.

justdb.cn shares some name servers with other domains, for example nlrc.cn, wosen.cn, cgbuy.com, 99065nx.com and taxifast.com.

These name servers are often used together with ns7.alidns.com, ns8.alidns.com, dns23.hichina.com, dns24.hichina.com, dns10.hichina.com, dns9.hichina.com, dns21.hichina.com, dns22.hichina.com and dns31.hichina.com.

Host names with nine IP numbers:

ns1.alidns.com points to 2408:4009:501::1, 39.96.153.45, 39.96.153.55, 47.118.199.205, 47.118.199.215, 120.76.107.45, 120.76.107.55, 139.224.142.115 and 139.224.142.125.

ns2.alidns.com points to 2408:4009:501::2, 39.96.153.46, 39.96.153.56, 47.118.199.206, 47.118.199.216, 120.76.107.46, 120.76.107.56, 139.224.142.116 and 139.224.142.126.

justdb.cn - robtex.com

justdb.cn

cn