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Server IP address resolved: No
Http response code: None
Last Checked: 11/02/2026
C21.com.cn attracts 4,939 unique visitors daily, generating 14,817 pageviews. The estimated value of c21.com.cn is 16,178 USD. Each visitor views approximately 3.21 pages on average.
C21.com.cn is hosted by CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN. Check out other websites hosted by CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN.
See the list of other websites hosted by CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN.
C21.com.cn is registered with the .CN top-level domain. Explore additional websites within the .CN zone.
A recent examination on (March 27, 2023), indicates that c21.com.cn has an expired wildcard SSL certificate issued by DigiCert, Inc. (expired on August 31, 2023). Click the "Refresh" button in the Safety Information section for updated SSL details. See the list of websites using SSL certificates issued by DigiCert, Inc..
According to Google Safe Browsing and Symantec c21.com.cn appears to be a safe domain.
Based on Google's Mobile-Friendly test, c21.com.cn is not well optimized for mobile and tablet devices. Ensuring your site is mobile-friendly guarantees better performance across all devices, and improving the web page loading time could further enhance user experience.
not found
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 |
ASN ID: 37963
ASN Title: CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN
Last Update: 01/23/2026
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last-modified: 2017-11-01T08:57:39Z
source: APNIC
person: Shuo Yu
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person: security trouble
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source: APNIC
% This query was served by the APNIC Whois Service version 1.88.15-46 (WHOIS-US4)
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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