`51hdc.com`

DNSSEC	⚠️ Not signed
A	120.55.13.16^{🇨🇳 Alibaba-Cloud120.55.0.0/17}
NS	`dns25.hichina.com` ⭐
		A	2408:4009:501::33^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.39^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.59^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.199^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.219^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.39^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.59^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.99^{🇨🇳 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	139.224.142.109^{🇨🇳 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	`dns26.hichina.com`
		A	2408:4009:501::34^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.37^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.62^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.197^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.221^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.37^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.62^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.102^{🇨🇳 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	139.224.142.107^{🇨🇳 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	`dns25.hichina.com`hostmaster@hichina.com 2026-01-09 #13

`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=1774476942

Same first word

51hdc.com

DNS History

14 records (3 active, 11 former)

○NSdns15.hichina.com2017-01-31 → 2017-01-31 · 4 obs

○ 2016-03-26 06:35:20
● 2017-01-31 03:55:16
○ 2018-07-30 10:30:14
○ 2026-03-25 22:38:22

○NSdns16.hichina.com2017-01-31 → 2017-01-31 · 4 obs

○ 2016-03-26 06:35:20
● 2017-01-31 03:55:16
○ 2018-07-30 10:30:14
○ 2026-03-25 22:38:22

○NSdns17.hichina.com2015-05-21 → 2015-05-21 · 3 obs

● 2015-05-21 23:51:00
○ 2015-10-21 15:41:04
○ 2026-03-25 22:38:22

○NSdns18.hichina.com2015-05-21 → 2015-05-21 · 3 obs

● 2015-05-21 23:51:00
○ 2015-10-21 15:41:04
○ 2026-03-25 22:38:22

●NSdns25.hichina.com2026-03-25 → 2026-03-25 · 3 obs

○ 2018-07-30 10:30:14
● 2026-03-25 22:38:20
● 2026-03-25 22:38:22

●NSdns26.hichina.com2026-03-25 → 2026-03-25 · 3 obs

○ 2018-07-30 10:30:14
● 2026-03-25 22:38:20
● 2026-03-25 22:38:22

○NSjuming.dnsdun.com2018-07-30 → 2018-07-30 · 4 obs

○ 2017-01-31 03:55:16
● 2018-07-30 10:30:14
○ 2026-03-25 22:38:20
○ 2026-03-25 22:38:22

○NSjuming.dnsdun.net2018-07-30 → 2018-07-30 · 4 obs

○ 2017-01-31 03:55:16
● 2018-07-30 10:30:14
○ 2026-03-25 22:38:20
○ 2026-03-25 22:38:22

○NSns1.51dns.com2015-12-29 → 2016-03-26 · 5 obs

○ 2015-10-21 15:41:04
● 2015-12-29 13:07:32
● 2016-03-26 06:35:20
○ 2017-01-31 03:55:16
○ 2026-03-25 22:38:22

○NSns2.51dns.com2015-12-29 → 2016-03-26 · 5 obs

○ 2015-10-21 15:41:04
● 2015-12-29 13:07:32
● 2016-03-26 06:35:20
○ 2017-01-31 03:55:16
○ 2026-03-25 22:38:22

○A101.251.112.422015-05-21 → 2015-05-21 · 3 obs

● 2015-05-21 23:51:00
○ 2015-10-21 15:41:04
○ 2026-03-25 22:38:22

○A107.164.39.2422018-07-30 → 2018-07-30 · 4 obs

○ 2017-01-31 03:55:16
● 2018-07-30 10:30:14
○ 2026-03-25 22:38:20
○ 2026-03-25 22:38:22

●A120.55.13.162026-03-25 → 2026-03-25 · 3 obs

○ 2018-07-30 10:30:14
● 2026-03-25 22:38:20
● 2026-03-25 22:38:22

○A23.107.50.1062015-12-29 → 2015-12-29 · 4 obs

○ 2015-10-21 15:41:04
● 2015-12-29 13:07:32
○ 2017-01-31 03:55:16
○ 2026-03-25 22:38:22

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, i.gtld-servers.net, d.gtld-servers.net, g.gtld-servers.net...	-
51hdc.com	dns25.hichina.com, dns26.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.39

NS records: dns25.hichina.com, dns26.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 3647ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`120.55.13.16`
NS	2	`dns26.hichina.com, dns25.hichina.com`
SOA	1	`dns25.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns25.hichina.com, dns25.hichina.com, dns25.hichina.com...)

Analysis

IP Addresses

51hdc.com points to a single IP: 120.55.13.16.

Name Servers

Two name servers dns25.hichina.com and dns26.hichina.com handle delegation for 51hdc.com.

51hdc.com uses the same name server setup as other domains, for example angelshost.com, soole.com.cn, chanceaccountancy.com, honber.com and tkgarden.cn.

51hdc.com shares name servers with other domains at least in part, for instance mspj.cn.

Host names with nine IP numbers:

dns25.hichina.com points to: 2408:4009:501::33, 39.96.153.39, 39.96.153.59, 47.118.199.199, 47.118.199.219, 120.76.107.39, 120.76.107.59, 139.224.142.99 and 139.224.142.109.

dns26.hichina.com points to: 2408:4009:501::34, 39.96.153.37, 39.96.153.62, 47.118.199.197, 47.118.199.221, 120.76.107.37, 120.76.107.62, 139.224.142.102 and 139.224.142.107.

51hdc.com - robtex.com

51hdc.com

com

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

`51hdc.com`

`com`