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C21.com.cn Overview
C21.com.cn belongs to CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN. Check the list of other websites hosted by CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN.
In terms of rank-to-traffic ratio, c21.com.cn has 2,884 unique users per day, viewing 5,767 pages. The rank based value of c21.com.cn is 4,411 USD. Every user makes 2.14 pageviews on average.
C21.com.cn boasts a link base consisting of 367 referring domains and 446 external backlinks, as revealed by the data obtained from web network scanning.
C21.com.cn top-level domain belongs to .CN domain zone. Check other webpages in .CN zone.
According the last verification test in March 27, 2023, c21.com.cn has an expired wildcard SSL certificate issued by DigiCert, Inc. (expired on August 31, 2023). Click button “Update” SSL Information at the Safety Information section. Check the list of websites using SSL by DigiCert, Inc..
Based on data from Google Safe Browsing and Symantec c21.com.cn is a fairly safe domain.
Based on Mobile-Friendly test by Google c21.com.cn is poorly optimized for mobile phones and tablets. Remember that optimizing your website design for mobile devices ensures that all of your web pages perform well on all devices, page loading speed can also be accelerated.
C21.com.cn Website Safety
We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.
Norton ConnectSafe evaluates c21.com.cn for any unsafe and insecure content. The results are critical for families with young children.
SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.
Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.
McAfee assesses c21.com.cn for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze c21.com.cn for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the c21.com.cn. This reputation system receives ratings from users and information from third-party sources, assesses the c21.com.cn for safety features and confirms, whether c21.com.cn is suitable for children.
| Domain | *.c21.com.cn |
| Issuer Organization | DigiCert, Inc. |
| Issuer | RapidSSL Global TLS RSA4096 SHA256 2022 CA1 |
| Algorithm | RSA-SHA256 |
| Valid form | 08/30/2022 |
| Expiration | 08/31/2023 |
| Signed | Certificate is not self signed |
| Additional Domains |
*.c21.com.cn c21.com.cn |
C21.com.cn Rank History
Alexa Rank shows how popular c21.com.cn is in comparison with other sites. The most popular site has Alexa Rank equals 1. If c21.com.cn has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to c21.com.cn and pageviews on c21.com.cn over the past 3 months.
C21.com.cn Hosting Information
ASN ID: 37963
ASN Title: CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CNLast Update: 01/23/2026
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aut-num: AS37963
as-name: CNNIC-ALIBABA-CN-NET-AP
descr: Hangzhou Alibaba Advertising Co.,Ltd.
descr: East Software Park, 99 Huaxing Rd.
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source: APNIC
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tech-c: IP50-AP
auth: # Filtered
remarks: Please note that CNNIC is not an ISP and is not
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remarks: Please contact the tech-c or admin-c of the network.
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last-modified: 2017-11-01T08:57:39Z
source: APNIC
person: Shuo Yu
address: 5F, Builing D, the West Lake International Plaza of S&T
address: No.391 Wen'er Road, Hangzhou City
address: Zhejiang, China, 310099
country: CN
phone: +86-0571-85022600
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last-modified: 2011-11-02T03:36:02Z
source: APNIC
person: Guoxin Gao
address: 5F, Builing D, the West Lake International Plaza of S&T
address: No.391 Wen'er Road, Hangzhou City
address: Zhejiang, China, 310099
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source: APNIC
person: security trouble
e-mail: cloud-cc-sqcloud@list.alibaba-inc.com
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source: APNIC
person: Guowei Pan
address: 5F, Builing D, the West Lake International Plaza of S&T
address: No.391 Wen'er Road, Hangzhou City
address: Zhejiang, China, 310099
country: CN
phone: +86-0571-85022088-30763
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nic-hdl: ZM877-AP
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last-modified: 2013-07-09T01:34:02Z
source: APNIC
% This query was served by the APNIC Whois Service version 1.88.15-46 (WHOIS-US4)
C21.com.cn Domain Registration and Settings
Domain Name: c21.com.cn
ROID: 20021209s10011s00060342-cn
Domain Status: ok
Registrant: 北京埃菲特国际特许经营咨询服务有限公司
Registrant Contact Email: paulyang@century21cn.com
Sponsoring Registrar: 阿里云计算有限公司（万网）
Name Server: dns21.hichina.com
Name Server: dns22.hichina.com
Registration Time: 1999-10-09 00:00:00
Expiration Time: 2025-10-09 00:00:00
DNSSEC: unsigned
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C21.com.cn HTML Check
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