`jiaoshubi.com`

DNSSEC	⚠️ Not signed
A	221.231.139.53^{🇨🇳 CHINATELECOM-JIANGSU-NANJING-IDC221.231.136.0/21 CTJS NJ-IDC}
NS	`dns1.4cun.com` ⭐
		A	2408:4005:3dc:af00:a6be:339e:a1a0:ceb7^{🇨🇳 Alibaba-Cloud2408:4005::/33}
		A	61.172.183.74^{🇨🇳 SHANGHAITELECOM61.172.182.0/23 SHIDC}
NS	`dns.4cun.com` ⚠️ Not in zone NS records
NS	`dns2.51dns.top` ⚠️ Not in zone NS records
		A	2408:4005:3dc:af00:a6be:339e:a1a0:ceb7^{🇨🇳 Alibaba-Cloud2408:4005::/33}
		A	219.138.102.210^{🇨🇳 CHINATELECOM-HUBEI-YICHANG-IDC219.138.102.0/24 yichang}
MX	`mail.jiaoshubi.com` ⭐
		A	202.102.86.238^{🇨🇳 CHINATELECOM-JIANGSU-NANJING-IDC202.102.80.0/20 CTJS NJ-IDC}
			PTR	`mail1238.4cun.com`
SOA	`dns.4cun.com`admin@jiaoshubi.com serial=1772529283

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1774407527

Subdomains

mail.jiaoshubi.com

Same first word

jiaoshubi.cn

jiaoshubi.com

Similar names

jishuibao.net

jiushibao.com

bijiashuo.com

DNS History

6 records (5 active, 1 former)

●NSdns.4cun.com2015-05-30 → 2026-03-25 · 2 obs

● 2015-05-30 16:33:14
● 2026-03-25 03:13:54

●NSdns1.4cun.com2026-03-17 → 2026-03-25 · 3 obs

○ 2015-05-30 16:33:14
● 2026-03-17 22:26:52
● 2026-03-25 03:13:54

●NSdns2.51dns.top2026-03-17 → 2026-03-25 · 3 obs

○ 2015-05-30 16:33:14
● 2026-03-17 22:26:52
● 2026-03-25 03:13:54

●MXmail.jiaoshubi.com2015-05-30 → 2026-03-25 · 2 obs

● 2015-05-30 16:33:14
● 2026-03-25 03:13:54

●A221.231.139.532015-12-13 → 2026-03-25 · 3 obs

○ 2015-09-25 13:56:22
● 2015-12-13 00:55:26
● 2026-03-25 03:13:54

○A221.231.139.72015-05-30 → 2015-09-25 · 4 obs

● 2015-05-30 16:33:14
● 2015-09-25 13:56:22
○ 2015-12-13 00:55:26
○ 2026-03-25 03:13:54

🔍 DNS Trace

Analysis

Hierarchy

jiaoshubi.com is a parent of mail.jiaoshubi.com.

IP Addresses

jiaoshubi.com points to a single IP address: 221.231.139.53.

Other host names such as tbdh.com.cn and jxjingsheng.com share IP numbers with jiaoshubi.com.

Name Servers

jiaoshubi.com is delegated to three name servers: dns1.4cun.com, dns.4cun.com and dns2.51dns.top.

At least part of the name servers for jiaoshubi.com are shared with other domains, for instance dubainews.cn, smtserv.com, zsyingyu.com, hksme.org.cn and shkeguo.com.

these name servers are commonly used with the name servers dns3.4cun.com, dns4.51dns.top, dns2.4cun.com, dns7.4cun.com, dns5.4cun.com, dns6.51dns.top, dns8.51dns.top, ns3.4cun.com, ns4.4cun.com and ns1.4cun.com.

Hosts with two IP numbers:

dns1.4cun.com points to 2408:4005:3dc:af00:a6be:339e:a1a0:ceb7 and 61.172.183.74.

dns2.51dns.top points to 2408:4005:3dc:af00:a6be:339e:a1a0:ceb7 and 219.138.102.210.

Hosts that point to 2408:4005:3dc:af00:a6be:339e:a1a0:ceb7 are dns1.4cun.com and dns2.51dns.top.

Mail Servers

The mail server for jiaoshubi.com is mail.jiaoshubi.com.

Host mail.jiaoshubi.com points to IP 202.102.86.238.

jiaoshubi.com - robtex.com

jiaoshubi.com

com