www.51code.com - robtex.com

www.51code.com

CNAMEwww.51code.com.cdn.dnsv1.com
CNAMEcj7ps46a.sched.sma-dk.tdnsstic1.cn
DNSSEC⚠️ Not signed
A2408:8726:1001:153:62::2🇨🇳 CHINA169-Backbone2408:8726::/32 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street
A2408:8726:1001:153:62::5🇨🇳 CHINA169-Backbone2408:8726::/32 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street
A2408:873c:8810:3:38::🇨🇳 CHINA169-Backbone2408:873c::/32 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street
A1.56.98.140🇨🇳 CHINA169-Backbone1.56.0.0/13 China Unicom Heilongjiang Province Network
A14.204.50.238🇨🇳 CHINA169-Backbone14.204.0.0/15 China Unicom Yunnan Province Network
A42.56.88.117🇨🇳 CHINA169-Backbone42.56.0.0/14 China Unicom Liaoning Province Network
A59.83.212.226🇨🇳 CHINA169-Backbone59.83.192.0/19 route of Chinaunicom
A119.167.249.58🇨🇳 CHINA169-Backbone119.164.0.0/14 CNC Group CHINA169 Shandong Province Network
A119.167.249.90🇨🇳 CHINA169-Backbone119.164.0.0/14 CNC Group CHINA169 Shandong Province Network
A122.188.44.51🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network
A122.188.44.139🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network
A122.188.45.51🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network
A122.188.45.182🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network
A221.204.15.60🇨🇳 CHINA169-Backbone221.204.0.0/15 CNC Group CHINA169 Shanxi Province Network

51code.com

CNAME51code.com.cdn.dnsv1.com
CNAMEdlsngmq0.sched.sma.tdnsstic1.cn
DNSSEC⚠️ Not signed
A1.56.98.140🇨🇳 CHINA169-Backbone1.56.0.0/13 China Unicom Heilongjiang Province Network
A14.204.50.238🇨🇳 CHINA169-Backbone14.204.0.0/15 China Unicom Yunnan Province Network
A42.56.88.117🇨🇳 CHINA169-Backbone42.56.0.0/14 China Unicom Liaoning Province Network
A59.83.212.226🇨🇳 CHINA169-Backbone59.83.192.0/19 route of Chinaunicom
A119.167.249.58🇨🇳 CHINA169-Backbone119.164.0.0/14 CNC Group CHINA169 Shandong Province Network
A119.167.249.90🇨🇳 CHINA169-Backbone119.164.0.0/14 CNC Group CHINA169 Shandong Province Network
A122.188.44.51🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network
A122.188.44.139🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network
A122.188.45.51🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network
A122.188.45.182🇨🇳 CHINA169-Backbone122.188.0.0/14 China Unicom Hubei Province Network
A221.204.15.60🇨🇳 CHINA169-Backbone221.204.0.0/15 CNC Group CHINA169 Shanxi Province Network

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DNS History

3 records (1 active, 2 former)

2017201820192020202120222023202420252026A210.5.156.21210.5.156.66CNAMEwww.51code.com.cdn.dnsv1.com
○A210.5.156.212016-12-28 → 2016-12-28 · 3 obs
● 2016-12-28 17:40:10
○ 2017-11-17 22:08:48
○ 2026-03-01 22:25:00
○A210.5.156.662017-11-17 → 2017-11-17 · 4 obs
○ 2016-12-28 17:40:10
● 2017-11-17 22:08:48
○ 2026-03-01 22:24:58
○ 2026-03-01 22:25:00
●CNAMEwww.51code.com.cdn.dnsv1.com2026-03-01 → 2026-03-01 · 2 obs
● 2026-03-01 22:24:58
● 2026-03-01 22:25:00

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comg.gtld-servers.net, e.gtld-servers.net, j.gtld-servers.net, m.gtld-servers.net...-
51code.comdns7.hichina.com, dns8.hichina.com18 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: 603ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1www.51code.com.cdn.dnsv1.com

📌 Glue Records Collected

Total: 18

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

Analysis

IP Addresses

www.51code.com points to fourteen IP addresses: 2408:8726:1001:153:62::2, 2408:8726:1001:153:62::5, 2408:873c:8810:3:38::, 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 including 9zc74odq.sched.sma.tdnsstic1.cn, 92bvkzq9.sched.sma.tdnsstic1.cn, 29a675k6.sched.sma.tdnsstic1.cn, 91l03d37.60-61.cjt.cdn.sy.qy3.cn and 0udzvjto.sched.sma.tdnsstic1.cn share IP numbers with www.51code.com.