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`hduhelp.com`

DNSSEC	🔒 Signed (DS record present)
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	`MS=ms15689089`
TXT	`v=spf1 +include:_netblocks.m.feishu.cn ~all`
TXT	`MS=ms29767643`
SOA	`vip1.alidns.com`hostmaster@hichina.com 2025-12-10 #11

	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=1770580197

al-hz-3.hduhelp.com

www.hduhelp.com

appdev.hduhelp.com

hduhelp.com

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.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: 741ms | 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	`v=spf1 +include:_netblocks.m.feishu.cn , MS=ms29767643...`
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 children al-hz-3.hduhelp.com, www.hduhelp.com and appdev.hduhelp.com.

hduhelp.com resolves to a single IP: 121.43.175.130.

hduhelp.com has two name servers: vip1.alidns.com and vip2.alidns.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 shares name servers with other domains to some extent, for example lzjoy.com and sts.org.cn.

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

hduhelp.com is handled by a single mail server, m1.feishu.cn.

hduhelp.com shares the mail server setup with other domains, for example qiaoqudian.com, seagine.com, yousails.com, hongsengtech.com and elementsea.com.

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