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1course.cn checked at 2025-12-24T09:21:21.523Z 540ms 210/210/210 100% R:20 allDone:true timedOut:false

`1course.cn`

NS	`vip3.alidns.com`
		A	2408:4009:500::3^{🇨🇳 CNNIC-ALIBABA-CN-NET-AP}
		A	8.212.93.3^{🇭🇰 Alibaba_Cloud_SEC}
		A	140.205.1.5^{🇨🇳 CNNIC-ALIBABA-CN-NET-AP}
		A	170.33.32.210^{🇸🇬 CNNIC-ALIBABA-CN-NET-AP}
		A	170.33.40.136^{🇸🇬 Alibaba_Cloud_SEC}
		A	170.33.73.26^{🇸🇬 CNNIC-ALIBABA-CN-NET-AP}
		A	170.33.80.10^{🇸🇬 CNNIC-ALIBABA-CN-NET-AP}
NS	`vip4.alidns.com`
		A	2408:4009:500::4^{🇨🇳 CNNIC-ALIBABA-CN-NET-AP}
		A	8.212.93.4^{🇭🇰 Alibaba_Cloud_SEC}
		A	140.205.1.6^{🇨🇳 CNNIC-ALIBABA-CN-NET-AP}
		A	170.33.32.211^{🇸🇬 CNNIC-ALIBABA-CN-NET-AP}
		A	170.33.40.137^{🇸🇬 Alibaba_Cloud_SEC}
		A	170.33.73.27^{🇸🇬 CNNIC-ALIBABA-CN-NET-AP}
		A	170.33.80.11^{🇸🇬 CNNIC-ALIBABA-CN-NET-AP}
NS	`ns3.dnsv4.com`
		A	2402:4e00:1470:2::10^{🇨🇳 TENCENT-NET-AP}
		A	1.12.0.24^{🇨🇳 TENCENT-NET-AP-CN}
		A	1.12.0.25^{🇨🇳 TENCENT-NET-AP-CN}
		A	1.13.76.53^{🇨🇳 TENCENT-NET-AP}
		A	36.155.149.53^{🇨🇳 CMNET-Jiangsu-AP}
		A	43.134.249.54^{🇸🇬 TENCENT-NET-AP-CN}
		A	112.80.181.153^{🇨🇳 CHINA169-Backbone}
		A	124.64.205.153^{🇨🇳 CHINA169-BJ}
		A	125.94.59.153^{🇨🇳 CHINA-TELECOM}
NS	`ns4.dnsv4.com`
		A	2402:4e00:111:fff::d^{🇨🇳 TENCENT-NET-AP}
		A	1.12.0.23^{🇨🇳 TENCENT-NET-AP-CN}
		A	1.12.0.26^{🇨🇳 TENCENT-NET-AP-CN}
		A	43.130.172.54^{🇸🇬 TENCENT-NET-AP-CN}
		A	49.7.107.153^{🇨🇳 CHINA-1}
		A	101.227.168.53^{🇨🇳 CHINANET-SH-AP}
		A	111.13.203.53^{🇨🇳 CHINAMOBILE-CN}
		A	117.135.128.153^{🇨🇳 CHINAMOBILE-CN}
			PTR	`.`
		A	163.177.5.53^{🇨🇳 UNICOM-GuangZhou-IDC}
		A	220.196.136.53^{🇨🇳 UNICOM-SHFT-IDC}
MX	`mx1.qiye.aliyun.com`
		A	47.246.137.47^{🇺🇸 CNNIC-ALIBABA-CN-NET-AP}
MX	`mx2.qiye.aliyun.com`
		A	47.246.136.231^{🇺🇸 CNNIC-ALIBABA-CN-NET-AP}
			PTR	`cz-clare.com`
			PTR	`reachsmartdwell.com`
			PTR	`wevolt.tech`
MX	`mx3.qiye.aliyun.com`
		A	47.246.136.231^{🇺🇸 CNNIC-ALIBABA-CN-NET-AP}
			PTR	`cz-clare.com`
			PTR	`reachsmartdwell.com`
			PTR	`wevolt.tech`
		A	47.246.137.47^{🇺🇸 CNNIC-ALIBABA-CN-NET-AP}
A	121.196.132.74^{🇨🇳 ALIBABA-CN-NET}

`cn`

	NS	`a.dns.cn`
	NS	`b.dns.cn`
	NS	`c.dns.cn`
	NS	`d.dns.cn`
	NS	`e.dns.cn`
	NS	`ns.cernet.net`

Up

www.1course.cn

server.1course.cn

Starts with same word

1course.com

1course.ru

1course.cn

Starts similarily

source1.de

1source.com.my

source1.in

source1.se

1source.co.uk

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source1.com

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1source.global

1course.ru

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1source.com

sou1rce.com

1source.org.au

1source.in

1course.cn

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AI analysis

1course.cn is a parent of www.1course.cn and server.1course.cn.

1course.cn points to a single IP address: 121.196.132.74.

Other host names such as www.1course.cn, yunat.net and shuyun.cn share IP numbers with 1course.cn.

1course.cn is delegated to four name servers: vip3.alidns.com, vip4.alidns.com, ns3.dnsv4.com and ns4.dnsv4.com.

At least part of the name servers for 1course.cn are shared with other domains, for instance speiyou.cn, tongtool.com, szgla.com, wuliangroup.cn and fbrq.com.

Host names with ten IP numbers:

ns4.dnsv4.com points to: 2402:4e00:111:fff::d, 1.12.0.23, 1.12.0.26, 43.130.172.54, 49.7.107.153, 101.227.168.53, 111.13.203.53, 117.135.128.153, 163.177.5.53 and 220.196.136.53.

Host names with nine IP numbers:

ns3.dnsv4.com points to: 2402:4e00:1470:2::10, 1.12.0.24, 1.12.0.25, 1.13.76.53, 36.155.149.53, 43.134.249.54, 112.80.181.153, 124.64.205.153 and 125.94.59.153.

Host names with seven IP numbers:

vip3.alidns.com points to: 2408:4009:500::3, 8.212.93.3, 140.205.1.5, 170.33.32.210, 170.33.40.136, 170.33.73.26 and 170.33.80.10.

vip4.alidns.com points to: 2408:4009:500::4, 8.212.93.4, 140.205.1.6, 170.33.32.211, 170.33.40.137, 170.33.73.27 and 170.33.80.11.

Three mail servers handle 1course.cn: mx1.qiye.aliyun.com, mx2.qiye.aliyun.com and mx3.qiye.aliyun.com.

1course.cn shares at least some mail servers with other domains, for example cctv-ax.com, iaskgene.com, iposport.com, yinqingli.com and antbank.hk.

These mail servers are commonly used alongside mxn.mxhichina.com, mxw.mxhichina.com, mxbiz1.qq.com and mxbiz2.qq.com.

Host names with two IP numbers:

The host name mx3.qiye.aliyun.com points to 47.246.136.231 and 47.246.137.47.

Host names with one IP number:

The host name mx1.qiye.aliyun.com points to 47.246.137.47.

The host name mx2.qiye.aliyun.com points to 47.246.136.231.

Host names pointing to 47.246.136.231:

mx3.qiye.aliyun.com and mx2.qiye.aliyun.com.

Host names pointing to 47.246.137.47:

mx3.qiye.aliyun.com and mx1.qiye.aliyun.com.