W3school.com.cn w3school 在线教程

全球最大的中文 Web 技术教程。

Online Status
Online

Server IP address resolved: Yes
Http response code: 200
Response time: 5.47 sec.
Last Checked: 03/09/2021

W3school.com.cn traffic volume is 207,167 unique daily visitors and their 776,876 pageviews. The web value rate of w3school.com.cn is 10,207,415 USD. Each visitor makes around 4.01 page views on average.

By Alexa's traffic estimates w3school.com.cn placed at 348 position over the world, while the largest amount of its visitors comes from China, where it takes 194 place.

Perfect for w3school.com.cn that their data center (provided by company company CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN) is located in China, as that empowers most of the visitors to reduce the page load time. See the list of other web pages hosted by CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN.

W3school.com.cn registered under .CN top-level domain. Check other websites in .CN zone.

The last verification results, performed on (November 28, 2019) w3school.com.cn show that w3school.com.cn has an expired SSL certificate issued by DigiCert Inc (expired on July 27, 2020). Click “Refresh” button for SSL Information at the Safety Information section. Check the list of websites using SSL certificates issued by DigiCert Inc.

In accordance with Google Safe Browsing, Google Safe Search, Symantec and Web of Trust w3school.com.cn is pretty a safe domain.

Relying Google MobileFriendly test w3school.com.cn is well optimized for mobile and tablet devices.

Global Rank
935
Average Load Time
3.82sec
Links In Count
1,366
Website Value
$9.5 M
Overview
Last Updated: 03/09/2021
Overall result - w3school.com.cn is safe.
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 Connect Safe
Last Updated: 08/05/2020
w3school.com.cn is safe.
Norton ConnectSafe evaluates w3school.com.cn for any unsafe and insecure content. The results are critical for families with young children.
Google Safe Search
Last Updated: 02/01/2019
w3school.com.cn is safe.
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.
Google Safe Browsing
Last Updated: 08/11/2020
w3school.com.cn is safe.
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.
Site Advisor
Last Updated: 02/22/2021
w3school.com.cn is safe.
McAfee assesses w3school.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 w3school.com.cn for mature or inappropriate content, only security checks are evaluated.
Web of Trust
Last Updated: 01/09/2019
w3school.com.cn child safety is very good.
The WOT calculates reputation of the w3school.com.cn. This reputation system receives ratings from users and information from third-party sources, assesses the w3school.com.cn for safety features and confirms, whether w3school.com.cn is suitable for children.

SSL Information
Domain www.w3school.com.cn
Issuer Organization DigiCert Inc
Issuer Encryption Everywhere DV TLS CA - G1
Algorithm RSA-SHA256
Valid form 07/28/2019
Expiration 07/27/2020
Signed Certificate is not self signed
Additional Domains www.w3school.com.cn
w3school.com.cn
Server Location

ASN Information

ASN ID: 37963
ASN Title: CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN

Last Update: 10/09/2020

% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS37888 - AS38911'

as-block: AS37888 - AS38911
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tech-c: HM20-AP
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% Information related to 'AS37936 - AS37970'

as-block: AS37936 - AS37970
descr: CNNIC ASN block
country: CN
remarks: These AS numbers are further assigned by CNNIC
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source: APNIC

% Information related to 'AS37963'

% Abuse contact for 'AS37963' is 'ipas@cnnic.cn'

aut-num: AS37963
as-name: CNNIC-ALIBABA-CN-NET-AP
descr: Hangzhou Alibaba Advertising Co.,Ltd.
descr: East Software Park, 99 Huaxing Rd.
descr: Hangzhou, China
country: CN
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last-modified: 2013-07-24T02:44:02Z
source: APNIC

irt: IRT-CNNIC-CN
address: Beijing, China
e-mail: ipas@cnnic.cn
abuse-mailbox: ipas@cnnic.cn
admin-c: IP50-AP
tech-c: IP50-AP
auth: # Filtered
remarks: Please note that CNNIC is not an ISP and is not
remarks: empowered to investigate complaints of network abuse.
remarks: Please contact the tech-c or admin-c of the network.
mnt-by: MAINT-CNNIC-AP
last-modified: 2017-11-01T08:57:39Z
source: APNIC

person: Shuo Yu
address: 5F, Builing D, the West Lake International Plaza of S&T
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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
country: CN
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source: APNIC

person: security trouble
e-mail: cloud-cc-sqcloud@list.alibaba-inc.com
address: 5th,floor,Building D,the West Lake International Plaza of S&T,391#Wen’er Road
address: Hangzhou, Zhejiang, China
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country: CN
mnt-by: MAINT-CNNIC-AP
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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
mnt-by: MAINT-CNNIC-AP
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)

WHOIS

Domain Name: w3school.com.cn
ROID: 20060720s10011s66954821-cn
Domain Status: clientTransferProhibited
Registrant ID: hc9292213483189
Registrant: 杨伟伟
Registrant Contact Email: rgb@qq.com
Sponsoring Registrar: 阿里云计算有限公司(万网)
Name Server: dns7.hichina.com
Name Server: dns8.hichina.com
Registration Time: 2006-07-20 11:05:27
Expiration Time: 2028-07-20 11:05:27
DNSSEC: unsigned


DNS Records
HostA RecordTTL
w3school.com.cn120.55.40.41600
HostMX RecordPriorityTTL
w3school.com.cnmxbiz1.qq.com53600
w3school.com.cnmxbiz2.qq.com103600
HostNS RecordTTL
w3school.com.cndns8.hichina.com86400
w3school.com.cndns7.hichina.com86400
HostTXT RecordTTL

dns7.hichina.com
TTL: 3600
Email address: hostmaster.hichina.com
Serial: 2017070300
Refresh: 3600
Retry: 1200
Expire: 3600
Minimum: 360


Errors

Last tested: 09/12/2018

Desktop
Desktop Speed
88%

Desktop Resource Breakdown
Total Resources20
Number of Hosts5
Static Resources16
JavaScript Resources2
CSS Resources1

Last tested: 02/08/2018

Mobile
Mobile Usability
89%
Mobile Speed
99%

Mobile Resource Breakdown
Total Resources2
Number of Hosts1
Static Resources1
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