nextclass.com - dns.ninja

`nextclass.com`

DNSSEC	⚠️ Not signed
NS	`ns1.alidns.com` ⭐
		A	2408:4009:501::1^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.45^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.55^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.205^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.215^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.45^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.55^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.115^{🇨🇳 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	139.224.142.125^{🇨🇳 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	`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	`mx1.feishu.cn` ⭐
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
MX	`mx2.feishu.cn`⁽⁵⁾
MX	`mx3.feishu.cn`⁽¹⁰⁾
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
		A	101.126.58.225^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.229.0^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
TXT	`v=spf1 +include:_netblocks.m.feishu.cn -all`
TXT	`verification-code-site-App_feishu=SWlVjwAj2XiuKY36VSnB`
SOA	`ns1.alidns.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=1785493967

Same first word

nextclass.com

nextclass.ro

nextclass.pro

nextclass.club

nextclass.net

Similar names

classnext.com

classxnet.com

classxnet.de

DNS History

14 records (6 active, 8 former)

●NSdns15.hichina.com2026-07-31 → 2026-07-31 · 3 obs

○ 2026-03-02 16:14:50
● 2026-07-31 10:35:54
● 2026-07-31 10:35:56

●NSdns16.hichina.com2026-07-31 → 2026-07-31 · 3 obs

○ 2026-03-02 16:14:50
● 2026-07-31 10:35:54
● 2026-07-31 10:35:56

●NSns1.alidns.com2026-07-31 → 2026-07-31 · 3 obs

○ 2026-03-02 16:14:50
● 2026-07-31 10:35:54
● 2026-07-31 10:35:56

○NSns1.parkingcrew.net2015-06-09 → 2016-01-16 · 4 obs

● 2015-06-09 03:36:38
● 2016-01-16 23:38:18
○ 2026-03-02 12:59:02
○ 2026-07-31 10:35:56

○NSns2.parkingcrew.net2015-06-09 → 2016-01-16 · 4 obs

● 2015-06-09 03:36:38
● 2016-01-16 23:38:18
○ 2026-03-02 12:59:02
○ 2026-07-31 10:35:56

○NSvip3.alidns.com2026-03-02 → 2026-03-02 · 5 obs

○ 2016-01-16 23:38:18
● 2026-03-02 12:59:02
● 2026-03-02 16:14:50
○ 2026-07-31 10:35:54
○ 2026-07-31 10:35:56

○NSvip4.alidns.com2026-03-02 → 2026-03-02 · 5 obs

○ 2016-01-16 23:38:18
● 2026-03-02 12:59:02
● 2026-03-02 16:14:50
○ 2026-07-31 10:35:54
○ 2026-07-31 10:35:56

○MXmail.h-email.net2015-06-09 → 2016-01-16 · 4 obs

● 2015-06-09 03:36:38
● 2016-01-16 23:38:18
○ 2026-03-02 12:59:02
○ 2026-07-31 10:35:56

●MXmx1.feishu.cn2026-03-02 → 2026-07-31 · 3 obs

○ 2016-01-16 23:38:18
● 2026-03-02 12:59:02
● 2026-07-31 10:35:56

●MXmx2.feishu.cn2026-03-02 → 2026-07-31 · 3 obs

○ 2016-01-16 23:38:18
● 2026-03-02 12:59:02
● 2026-07-31 10:35:56

●MXmx3.feishu.cn2026-03-02 → 2026-07-31 · 3 obs

○ 2016-01-16 23:38:18
● 2026-03-02 12:59:02
● 2026-07-31 10:35:56

○A185.53.178.82015-06-09 → 2015-10-31 · 4 obs

● 2015-06-09 03:36:38
● 2015-10-31 19:53:58
○ 2016-01-16 23:38:18
○ 2026-07-31 10:35:56

○A185.53.178.92016-01-16 → 2016-01-16 · 4 obs

○ 2015-10-31 19:53:58
● 2016-01-16 23:38:18
○ 2016-04-05 04:06:48
○ 2026-07-31 10:35:56

○A45.56.111.2412016-04-05 → 2017-04-19 · 5 obs

○ 2016-01-16 23:38:18
● 2016-04-05 04:06:48
● 2017-04-19 18:02:06
○ 2026-03-02 12:59:02
○ 2026-07-31 10:35:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
nextclass.com	dns15.hichina.com, dns16.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.41

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for nextclass.com (unsigned zone)

⏱️ Timing

Total: 515ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`dns16.hichina.com, dns15.hichina.com`
MX	3	`mx3.feishu.cn (pri: 10), mx2.feishu.cn (pri: 5)...`
TXT	2	`v=spf1 +include:_netblocks.m.feishu.cn -, verification-code-site-App_feishu=SWlVjw`
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

Name Servers

nextclass.com has three name servers — ns1.alidns.com, dns15.hichina.com and dns16.hichina.com.

nextclass.com has at least partial name server overlap with other domains, such as hcrd.com.cn, mrray.cn, lc-edi.com and two others.

These name servers tend to appear together with the name servers ns2.alidns.com, ns7.alidns.com and ns8.alidns.com.

Host names resolving to 9 IP numbers:

ns1.alidns.com points to 39.96.153.45, 39.96.153.55, 47.118.199.205 and 6 other IP addresses.

dns15.hichina.com points to 39.96.153.42, 39.96.153.52, 47.118.199.202 and 6 other IP addresses.

dns16.hichina.com points to 39.96.153.41, 39.96.153.51, 47.118.199.201 and 6 other IP addresses.

Mail Servers

nextclass.com has three mail servers: mx1.feishu.cn, mx2.feishu.cn and mx3.feishu.cn.

nextclass.com shares at least some of its mail servers with other domains — for example chengfengerlai.com, sang.cc, queclink.com and two more.

These mail servers tend to appear together with the mail servers mx1.qiye.aliyun.com, mx2.qiye.aliyun.com and mx3.qiye.aliyun.com.

Hosts that resolve to one IP address:

mx1.feishu.cn resolves to 52.220.106.220.

Hosts with three IP address records:

mx3.feishu.cn resolves to 52.220.106.220, 101.126.58.225 and 122.14.229.0.

The host names mx1.feishu.cn and mx3.feishu.cn both resolve to 52.220.106.220 IP addresses.