51mdd.com - robtex.com

51mdd.com

DNSSEC⚠️ Not signed
A61.129.48.147🇨🇳 SHANGHAITELECOM61.129.0.0/17 Chinanet Shanghai
NSdns.51job.com ⭐
A61.129.48.132🇨🇳 SHANGHAITELECOM61.129.0.0/17 Chinanet Shanghai
NSns3.51job.com
A61.129.48.131🇨🇳 SHANGHAITELECOM61.129.0.0/17 Chinanet Shanghai
TXTglobalsign-domain-verification=C0_QFCp8sJqxRTL6Ut89u9xpZUOAfRe7uAv_nNYnOa
SOAdns.51job.comroot@dns.51job.com 2025-12-19 #1

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1771291435

Subdomains

appdown.51mdd.com

Same first word

51mdd.com

DNS History

23 records (3 active, 20 former)

20162017201820192020202120222023202420252026NSdns.51job.comns3.51job.comns1.namebrightdns.comns2.namebrightdns.comnsg1.namebrightdns.comnsg2.namebrightdns.comMXanmail.namebrightmail.comA61.129.48.147107.23.198.24052.0.96.2452.204.129.2252.206.43.23452.21.128.10052.4.72.13752.71.117.9954.174.31.25454.208.74.21554.210.33.19054.236.123.22454.236.156.18954.85.127.70CNAMEhdredirect-lb-399551664.us-east-1.elb.amazonaws.comhdredirect-lb3-890977680.us-east-1.elb.amazonaws.com
●NSdns.51job.com2026-03-13 → 2026-03-14 · 3 obs
○ 2017-04-18 11:31:22
● 2026-03-13 14:07:02
● 2026-03-14 01:14:16
○NSns1.namebrightdns.com2016-09-19 → 2017-04-18 · 5 obs
○ 2016-03-13 16:58:48
● 2016-09-19 08:20:10
● 2017-04-18 11:31:22
○ 2026-03-13 14:07:02
○ 2026-03-14 01:14:16
○NSns2.namebrightdns.com2016-09-19 → 2017-04-18 · 5 obs
○ 2016-03-13 16:58:48
● 2016-09-19 08:20:10
● 2017-04-18 11:31:22
○ 2026-03-13 14:07:02
○ 2026-03-14 01:14:16
●NSns3.51job.com2026-03-13 → 2026-03-14 · 3 obs
○ 2017-04-18 11:31:22
● 2026-03-13 14:07:02
● 2026-03-14 01:14:16
○NSnsg1.namebrightdns.com2015-07-22 → 2016-03-13 · 4 obs
● 2015-07-22 22:17:56
● 2016-03-13 16:58:48
○ 2016-09-19 08:20:10
○ 2026-03-14 01:14:16
○NSnsg2.namebrightdns.com2015-07-22 → 2016-03-13 · 4 obs
● 2015-07-22 22:17:56
● 2016-03-13 16:58:48
○ 2016-09-19 08:20:10
○ 2026-03-14 01:14:16
○MXanmail.namebrightmail.com2015-07-22 → 2016-03-13 · 4 obs
● 2015-07-22 22:17:56
● 2016-03-13 16:58:48
○ 2016-09-19 08:20:10
○ 2026-03-14 01:14:16
○A107.23.198.2402016-09-19 → 2016-09-19 · 4 obs
○ 2016-03-13 16:58:48
● 2016-09-19 08:20:10
○ 2017-04-18 11:31:22
○ 2026-03-14 01:14:16
○A52.0.96.242016-03-13 → 2016-03-13 · 4 obs
○ 2015-11-25 07:29:36
● 2016-03-13 16:58:48
○ 2016-09-19 08:20:10
○ 2026-03-14 01:14:16
○A52.204.129.222017-04-18 → 2017-04-18 · 4 obs
○ 2016-09-19 08:20:10
● 2017-04-18 11:31:22
○ 2026-03-13 14:07:02
○ 2026-03-14 01:14:16
○A52.206.43.2342016-09-19 → 2016-09-19 · 4 obs
○ 2016-03-13 16:58:48
● 2016-09-19 08:20:10
○ 2017-04-18 11:31:22
○ 2026-03-14 01:14:16
○A52.21.128.1002015-11-25 → 2015-11-25 · 4 obs
○ 2015-07-22 22:17:56
● 2015-11-25 07:29:36
○ 2016-03-13 16:58:48
○ 2026-03-14 01:14:16
○A52.4.72.1372016-09-19 → 2016-09-19 · 4 obs
○ 2016-03-13 16:58:48
● 2016-09-19 08:20:10
○ 2017-04-18 11:31:22
○ 2026-03-14 01:14:16
○A52.71.117.992016-03-13 → 2016-03-13 · 4 obs
○ 2015-11-25 07:29:36
● 2016-03-13 16:58:48
○ 2016-09-19 08:20:10
○ 2026-03-14 01:14:16
○A54.174.31.2542015-07-22 → 2015-07-22 · 3 obs
● 2015-07-22 22:17:56
○ 2026-03-13 14:07:02
○ 2026-03-14 01:14:16
○A54.208.74.2152015-07-22 → 2015-07-22 · 3 obs
● 2015-07-22 22:17:56
○ 2026-03-13 14:07:02
○ 2026-03-14 01:14:16
○A54.210.33.1902016-09-19 → 2016-09-19 · 4 obs
○ 2016-03-13 16:58:48
● 2016-09-19 08:20:10
○ 2017-04-18 11:31:22
○ 2026-03-14 01:14:16
○A54.236.123.2242016-09-19 → 2016-09-19 · 4 obs
○ 2016-03-13 16:58:48
● 2016-09-19 08:20:10
○ 2017-04-18 11:31:22
○ 2026-03-14 01:14:16
○A54.236.156.1892015-11-25 → 2015-11-25 · 4 obs
○ 2015-07-22 22:17:56
● 2015-11-25 07:29:36
○ 2016-03-13 16:58:48
○ 2026-03-14 01:14:16
○A54.85.127.702017-04-18 → 2017-04-18 · 4 obs
○ 2016-09-19 08:20:10
● 2017-04-18 11:31:22
○ 2026-03-13 14:07:02
○ 2026-03-14 01:14:16
●A61.129.48.1472026-03-13 → 2026-03-14 · 3 obs
○ 2017-04-18 11:31:22
● 2026-03-13 14:07:02
● 2026-03-14 01:14:16
○CNAMEhdredirect-lb-399551664.us-east-1.elb.amazonaws.com2015-07-22 → 2016-09-19 · 4 obs
● 2015-07-22 22:17:56
● 2016-09-19 08:20:10
○ 2017-04-18 11:31:22
○ 2026-03-14 01:14:16
○CNAMEhdredirect-lb3-890977680.us-east-1.elb.amazonaws.com2017-04-18 → 2017-04-18 · 4 obs
○ 2016-09-19 08:20:10
● 2017-04-18 11:31:22
○ 2026-03-13 14:07:02
○ 2026-03-14 01:14:16

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
51mdd.comns3.51job.com, dns.51job.com2 records

✅ Authoritative Response

Server: 61.129.48.132

NS records: ns3.51job.com, dns.51job.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 3484ms | Queries: -

📄 Records

TypeCountSample Data
A161.129.48.147
NS2dns.51job.com, ns3.51job.com
TXT1globalsign-domain-verification=C0_QFCp8s
SOA1dns.51job.com root.dns.51job.com

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns3.51job.com, dns.51job.com)

Analysis

Hierarchy

The parent of appdown.51mdd.com is 51mdd.com.

IP Addresses

51mdd.com points to a single IP address: 61.129.48.147.

Other host names, for example shtel-cs.gslb.51jobdns.com, zdtel-cs4.51jobdns.com and xinghua.org.cn share IPs with 51mdd.com.

Name Servers

Two name servers dns.51job.com and ns3.51job.com handle the delegation for 51mdd.com.

51mdd.com shares the same name server setup as other domains, for example 51miduoduo.com, 51jobcdn.com, 51price.com, maketion.com and coolping.net.

51mdd.com at least partially shares name servers with other domains, for example 51job.hk, 51job.com, coolping.com, 51job.com.hk and 51car.com.

These name servers are often used together with ns1.51job.com, ns2.51job.com, ns4.51job.com, ns5.51job.com, ns6.51job.com, ns7.51job.com, ns8.51job.com, ns9.51job.com and ns3.51job.hk.

Host names with one IP number:

dns.51job.com points to 61.129.48.132; ns3.51job.com points to 61.129.48.131.