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`hduhelp.com`

DNSSEC	⚠️ Not signed
A	121.43.175.130^{🇨🇳 ALIBABA-CN-NET}
NS	`vip1.alidns.com` ⭐
		A	2408:4009:500::1^{🇨🇳 CNNIC-ALIBABA-CN-NET-AP}
		A	8.212.93.1^{🇭🇰 Alibaba_Cloud_SEC}
		A	140.205.1.1^{🇨🇳 CNNIC-ALIBABA-CN-NET-AP}
		A	170.33.32.208^{🇸🇬 Alibaba_Cloud_SEC}
		A	170.33.73.24^{🇸🇬 Alibaba_Cloud_SEC}
		A	170.33.80.8^{🇸🇬 Alibaba_Cloud_SEC}
NS	`vip2.alidns.com`
		A	2408:4009:500::2^{🇨🇳 CNNIC-ALIBABA-CN-NET-AP}
		A	8.212.93.2^{🇭🇰 Alibaba_Cloud_SEC}
		A	140.205.1.2^{🇨🇳 CNNIC-ALIBABA-CN-NET-AP}
		A	170.33.32.209^{🇸🇬 Alibaba_Cloud_SEC}
		A	170.33.73.25^{🇸🇬 Alibaba_Cloud_SEC}
		A	170.33.80.9^{🇸🇬 Alibaba_Cloud_SEC}
MX	`m1.feishu.cn` ⭐
TXT	`v=spf1 +include:_netblocks.m.feishu.cn ~all`
TXT	`MS=ms29767643`
TXT	`MS=ms15689089`
SOA	`vip1.alidns.com`hostmaster@hichina.com 2026-01-07 #16

	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=1770846807

al-hz-3.hduhelp.com

www.hduhelp.com

appdev.hduhelp.com

hduhelp.com

Zone	Nameservers	Glue
com	c.gtld-servers.net, f.gtld-servers.net, e.gtld-servers.net, b.gtld-servers.net...	-
hduhelp.com	vip1.alidns.com, vip2.alidns.com	20 records

Server: 121.40.6.162

NS records: vip1.alidns.com, vip2.alidns.com

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

Total: 871ms | Queries: -

Type	Count	Sample Data
A	1	`121.43.175.130`
NS	2	`vip1.alidns.com, vip2.alidns.com`
MX	1	`m1.feishu.cn (pri: 20)`
TXT	3	`MS=ms29767643, v=spf1 +include:_netblocks.m.feishu.cn ...`
SOA	1	`vip1.alidns.com hostmaster.hichina.com`

Total: 20

Out-of-bailiwick: 20 (vip1.alidns.com, vip1.alidns.com, vip1.alidns.com...)

hduhelp.com has al-hz-3.hduhelp.com, www.hduhelp.com and appdev.hduhelp.com as children.

hduhelp.com points to a single IP address: 121.43.175.130.

Two name servers vip1.alidns.com and vip2.alidns.com handle the delegation for hduhelp.com.

hduhelp.com shares the same name server setup as other domains, for example buleji.com, aladedalu.com, rongyao666.com, studenttool.cn and tigerchan.cn.

hduhelp.com partially shares name servers with other domains, for example lzjoy.com and sts.org.cn.

These name servers are often used together with vip3.alidns.com and vip4.alidns.com.

Host names with six IP numbers:

The m1.feishu.cn mail server handles hduhelp.com.

hduhelp.com shares the same mail server setup as other domains, including qiaoqudian.com, seagine.com, yousails.com, hongsengtech.com and elementsea.com.

hduhelp.com shares at least partially some mail servers with other domains, for instance mijo.cn, depu.cn, yatsenglobal.com, dtbrain.com and xsky.com.