certdown.com - dns.ninja

`certdown.com`

DNSSEC	⚠️ Not signed
A	121.199.13.233^{🇨🇳 Alibaba-Cloud121.199.0.0/16}
NS	`dns29.hichina.com` ⭐
		A	2408:4009:501::37^{🇨🇳 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	`dns30.hichina.com`
		A	2408:4009:501::38^{🇨🇳 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	`dns29.hichina.com`hostmaster@hichina.com 2026-01-12 #9

`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=1786088649

Previously MX for

certdown.com

Same first word

certdown.com

Similar names

DNS History

7 records (3 active, 4 former)

●NSdns29.hichina.com2026-02-19 → 2026-08-07 · 3 obs

○ 2018-10-26 03:58:56
● 2026-02-19 01:21:10
● 2026-08-07 07:49:52

●NSdns30.hichina.com2026-02-19 → 2026-08-07 · 3 obs

○ 2018-10-26 03:58:56
● 2026-02-19 01:21:10
● 2026-08-07 07:49:52

○NSns1.4cert.com2015-07-12 → 2018-10-26 · 4 obs

● 2015-07-12 21:24:22
● 2018-10-26 03:58:56
○ 2026-02-19 01:21:10
○ 2026-08-07 07:49:52

○NSns2.4cert.com2015-07-12 → 2018-10-26 · 4 obs

● 2015-07-12 21:24:22
● 2018-10-26 03:58:56
○ 2026-02-19 01:21:10
○ 2026-08-07 07:49:52

○MXcertdown.com2015-07-12 → 2018-10-26 · 4 obs

● 2015-07-12 21:24:22
● 2018-10-26 03:58:56
○ 2026-02-19 01:21:10
○ 2026-08-07 07:49:52

●A121.199.13.2332026-02-19 → 2026-08-07 · 3 obs

○ 2018-10-26 03:58:56
● 2026-02-19 01:21:10
● 2026-08-07 07:49:52

○A192.121.0.392015-07-12 → 2018-10-26 · 4 obs

● 2015-07-12 21:24:22
● 2018-10-26 03:58:56
○ 2026-02-19 01:21:10
○ 2026-08-07 07:49:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, d.gtld-servers.net, c.gtld-servers.net...	-
certdown.com	dns29.hichina.com, dns30.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.39

NS records: dns29.hichina.com, dns30.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for certdown.com (unsigned zone)

⏱️ Timing

Total: 535ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`121.199.13.233`
NS	2	`dns30.hichina.com, dns29.hichina.com`
SOA	1	`dns29.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns29.hichina.com, dns29.hichina.com, dns29.hichina.com...)

Analysis

IP Addresses

certdown.com resolves to one IP address: 121.199.13.233.

Name Servers

Two name servers handle the delegation for certdown.com: dns29.hichina.com and dns30.hichina.com.

certdown.com uses the same name servers as several other domains — among them dotak.top, mada29.com, dfalv.cn and two more.

certdown.com has at least partial name server overlap with other domains, such as oowmo.com, szbmjx.com, xpgq.cn and two others.

It is common to see these name servers used together with name servers expirens3.hichina.com and expirens4.hichina.com.

Hostnames that resolve to 9 IP addresses:

dns29.hichina.com resolves to 39.96.153.39, 39.96.153.59 and 47.118.199.199 among others, with 6 other IP addresses in total.

dns30.hichina.com resolves to 39.96.153.37, 39.96.153.62 and 47.118.199.197 among others, with 6 other IP addresses in total.