`classroom365.com`

DNSSEC	⚠️ Not signed
A	47.94.6.159^{🇨🇳 Alibaba-Cloud47.94.0.0/15 CT BeiJing IDC}
NS	`dns15.hichina.com` ⭐
		A	2408:4009:501::23^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.42^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.52^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.202^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.212^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.42^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.52^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.112^{🇨🇳 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	139.224.142.122^{🇨🇳 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	`dns16.hichina.com`
		A	2408:4009:501::24^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.41^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.51^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.201^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.211^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.41^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.51^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.111^{🇨🇳 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	139.224.142.121^{🇨🇳 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,}
MX	`mxbiz1.qq.com` ⭐
MX	`mxbiz2.qq.com`⁽¹⁰⁾
SOA	`dns15.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=1774485957

Subdomains

www.classroom365.com

Same first word

classroom365.net

classroom365.com

DNS History

8 records (5 active, 3 former)

●NSdns15.hichina.com2015-06-11 → 2026-03-26 · 2 obs

● 2015-06-11 09:38:40
● 2026-03-26 01:04:12

●NSdns16.hichina.com2015-06-11 → 2026-03-26 · 2 obs

● 2015-06-11 09:38:40
● 2026-03-26 01:04:12

●MXmxbiz1.qq.com2016-11-29 → 2026-03-26 · 2 obs

● 2016-11-29 13:42:36
● 2026-03-26 01:04:12

●MXmxbiz2.qq.com2016-11-29 → 2026-03-26 · 2 obs

● 2016-11-29 13:42:36
● 2026-03-26 01:04:12

○A139.217.28.742016-11-29 → 2016-11-29 · 4 obs

○ 2016-04-12 13:47:56
● 2016-11-29 13:42:36
○ 2017-04-24 00:04:12
○ 2026-03-26 01:04:12

○A139.217.6.462017-04-24 → 2017-04-24 · 4 obs

○ 2016-11-29 13:42:36
● 2017-04-24 00:04:12
○ 2026-02-23 10:51:20
○ 2026-03-26 01:04:12

●A47.94.6.1592026-02-23 → 2026-03-26 · 3 obs

○ 2017-04-24 00:04:12
● 2026-02-23 10:51:20
● 2026-03-26 01:04:12

○A59.151.39.1172015-06-11 → 2016-04-12 · 4 obs

● 2015-06-11 09:38:40
● 2016-04-12 13:47:56
○ 2016-11-29 13:42:36
○ 2026-03-26 01:04:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
classroom365.com	dns15.hichina.com, dns16.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.42

NS records: dns15.hichina.com, dns16.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for classroom365.com (unsigned zone)

⏱️ Timing

Total: 477ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`47.94.6.159`
NS	2	`dns15.hichina.com, dns16.hichina.com`
MX	2	`mxbiz2.qq.com (pri: 10), mxbiz1.qq.com (pri: 5)`
SOA	1	`dns15.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns15.hichina.com, dns15.hichina.com, dns15.hichina.com...)

Analysis

Hierarchy

classroom365.com is the parent of www.classroom365.com.

IP Addresses

classroom365.com resolves to one IP number: 47.94.6.159.

Name Servers

classroom365.com is delegated to two name servers dns15.hichina.com and dns16.hichina.com.

classroom365.com shares the same name server setup as other domains, for instance everprox.com, llgmq.com, irzk.cn, expo-window.com and rhu.cn.

classroom365.com shares name servers with other domains at least partially, for example woomei.com and keruihg.com.

Host names with nine IP numbers:

dns15.hichina.com points to: 2408:4009:501::23, 39.96.153.42, 39.96.153.52, 47.118.199.202, 47.118.199.212, 120.76.107.42, 120.76.107.52, 139.224.142.112 and 139.224.142.122.

dns16.hichina.com points to: 2408:4009:501::24, 39.96.153.41, 39.96.153.51, 47.118.199.201, 47.118.199.211, 120.76.107.41, 120.76.107.51, 139.224.142.111 and 139.224.142.121.

Mail Servers

Two mail servers handle classroom365.com: mxbiz1.qq.com and mxbiz2.qq.com.

classroom365.com shares the same mail server setup as other domains, for instance wishte.com, zhicent.com, ntcchina.net, qtlegou.com and oyacarbon.com.

classroom365.com shares at least partially some mail servers with other domains, including 6137.net, iofirst.com and chorders.com.

classroom365.com - robtex.com