`51code.com`

	CNAME	`51code.com.cdn.dnsv1.com`
	CNAME	`dlsngmq0.sched.sma.tdnsstic1.cn`
	DNSSEC	⚠️ Not signed
	A	1.56.98.140^{🇨🇳 CHINA169-Backbone1.56.0.0/13 China Unicom Heilongjiang Province Network}
	A	14.204.50.238^{🇨🇳 CHINA169-Backbone14.204.0.0/15 China Unicom Yunnan Province Network}
	A	42.56.88.117^{🇨🇳 CHINA169-Backbone42.56.0.0/14 China Unicom Liaoning Province Network}
	A	59.83.212.226^{🇨🇳 CHINA169-Backbone59.83.192.0/19 route of Chinaunicom}
	A	119.167.249.58^{🇨🇳 CHINA169-Backbone119.164.0.0/14 CNC Group CHINA169 Shandong Province Network}
	A	119.167.249.90^{🇨🇳 CHINA169-Backbone119.164.0.0/14 CNC Group CHINA169 Shandong Province Network}
	A	122.188.44.51^{🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network}
	A	122.188.44.139^{🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network}
	A	122.188.45.51^{🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network}
	A	122.188.45.182^{🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network}
	A	221.204.15.60^{🇨🇳 CHINA169-Backbone221.204.0.0/15 CNC Group CHINA169 Shanxi Province Network}

`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=1771291435

Subdomains

www.51code.com

Same first word

51code.com

Similar names

code51.cn

DNS History

8 records (3 active, 5 former)

●NSdns7.hichina.com2015-06-09 → 2026-03-13 · 2 obs

● 2015-06-09 14:51:50
● 2026-03-13 22:08:30

●NSdns8.hichina.com2015-06-09 → 2026-03-13 · 2 obs

● 2015-06-09 14:51:50
● 2026-03-13 22:08:30

○MXmail.51code.com2015-06-09 → 2016-04-17 · 4 obs

● 2015-06-09 14:51:50
● 2016-04-17 12:15:48
○ 2016-11-30 05:39:06
○ 2026-03-13 22:08:30

○A203.130.59.302016-11-30 → 2016-11-30 · 4 obs

○ 2016-04-17 12:15:48
● 2016-11-30 05:39:06
○ 2026-03-01 22:24:58
○ 2026-03-13 22:08:30

○A218.64.167.2072015-06-09 → 2016-04-17 · 4 obs

● 2015-06-09 14:51:50
● 2016-04-17 12:15:48
○ 2016-11-30 05:39:06
○ 2026-03-13 22:08:30

○CNAME1st.ecoma.ourwebpic.com2016-11-30 → 2016-11-30 · 3 obs

● 2016-11-30 05:39:06
○ 2026-03-01 22:24:58
○ 2026-03-13 22:08:30

●CNAME51code.com.cdn.dnsv1.com2026-03-01 → 2026-03-13 · 3 obs

○ 2016-11-30 05:39:06
● 2026-03-01 22:24:58
● 2026-03-13 22:08:30

○CNAME51code.com.wswebpic.com2016-11-30 → 2016-11-30 · 3 obs

● 2016-11-30 05:39:06
○ 2026-03-01 22:24:58
○ 2026-03-13 22:08:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
51code.com	dns7.hichina.com, dns8.hichina.com	18 records

✅ Authoritative Response

Server: 120.76.107.43

NS records: dns7.hichina.com, dns8.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 51code.com (unsigned zone)

⏱️ Timing

Total: 841ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns7.hichina.com, dns8.hichina.com`
CNAME	1	`51code.com.cdn.dnsv1.com`
SOA	1	`dns7.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns7.hichina.com, dns7.hichina.com, dns7.hichina.com...)

Analysis

Hierarchy

51code.com is the parent of www.51code.com.

IP Addresses

Eleven IP numbers are pointed to by 51code.com: 1.56.98.140, 14.204.50.238, 42.56.88.117, 59.83.212.226, 119.167.249.58, 119.167.249.90, 122.188.44.51, 122.188.44.139, 122.188.45.51, 122.188.45.182 and 221.204.15.60.

Other host names, for instance 3y719dl4.sched.sma-dk.tdnsstic1.cn, fhyaci8i.sched.sma.tdnsstic1.cn, mnleitx6.sched.sma.tdnsstic1.cn, cdn-ijnn3z6g.sched.sma-dk.tdnsstic1.cn and mzo6hrz3.sched.sma.tdnsstic1.cn share IP numbers with 51code.com.

51code.com - robtex.com

51code.com

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