I21st.cn 21英语网-21世纪报官方网站

21英语网是极具原创性的英语学习和教学网站，拥有独家的英语学习资料及教育资料，专注于打造最具人气的英语学习交流平台，为全国英语学习者和教育者提供专业服务。


Online Status
Online

Server IP address resolved: Yes
Http response code: 200
Response time: 2.02 sec.
Last Checked: 11/15/2024

I21st.cn traffic volume is 3,481 unique daily visitors and their 9,050 pageviews. The web value rate of i21st.cn is 159,344 USD. Each visitor makes around 2.78 page views on average.

By Alexa's traffic estimates i21st.cn placed at 5,181 position over the world, while the largest amount of its visitors comes from China, where it takes 7,969 place.

Perfect for i21st.cn that their data center (provided by company company China Mobile) 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 China Mobile.

I21st.cn registered under .CN top-level domain. Check other websites in .CN zone.

The last verification results, performed on (August 20, 2024) i21st.cn show that i21st.cn has a valid and up-to-date wildcard SSL certificate issued by GlobalSign nv-sa expiring on February 03, 2025. Click “Refresh” button for SSL Information at the Safety Information section. Check the list of websites using SSL certificates issued by GlobalSign nv-sa.

In accordance with Google Safe Browsing, Google Safe Search, Symantec and Web of Trust i21st.cn is pretty a safe domain.

Relying Google MobileFriendly test i21st.cn is well optimized for mobile and tablet devices.


Global Rank
79,833
Average Load Time
0.68sec
Links In Count
222
Website Value
$148,920

Audience Geography. Where are i21st.cn visitors located?

Country Visitors
China China CN87.2%
United States United States US3%
Hong Kong Hong Kong HK1.8%
Taiwan Taiwan TW1.5%
Other6.4%
Country Pageviews
China China CN96.1%
United States United States US0.9%
Hong Kong Hong Kong HK0.6%
Taiwan Taiwan TW0.5%
Other1.9%

Where do visitors go on i21st.cn?

Subdomain Pageviews
paper.i21st.cn		38.27%
i21st.cn		20.41%
elt.i21st.cn		14.68%
contest.i21st.cn		6.85%
m.i21st.cn		3.08%
other		16.71%
Subdomain Pageviews per User
paper.i21st.cn		5
elt.i21st.cn		4
i21st.cn		1.8
m.i21st.cn		1
contest.i21st.cn		1
Subdomain Reach
i21st.cn		38.82%
paper.i21st.cn		24.62%
contest.i21st.cn		18.15%
elt.i21st.cn		12.28%
m.i21st.cn		10.24%

How popular is i21st.cn?

PeriodGlobal RankGlobal Rank Delta
past 3 months7983323504
past month65134-34537
past week47944-15287
yesterday5376914364
DaysPageviews RankPageviews Rank DeltaPageviews per MillionPageviews per Million DeltaPageviews per UserPageviews per User Delta
90914033872661-48.295%2.6-28.93%
3064812-5669793120%3.350%
738031-153501850%4.910%
191667627147-72.989%1-74.653%
DaysReach RankReach Rank DeltaReach per MillionReach per Million Delta
90800101851088-27.33%
3069759-268571050%
756367-164311330%
145298-2948206%

Overview
Last Updated: 11/15/2024
Overall result - i21st.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: 03/22/2024
i21st.cn is safe.
Norton ConnectSafe evaluates i21st.cn for any unsafe and insecure content. The results are critical for families with young children.
Google Safe Search
Last Updated: 02/09/2019
i21st.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: 01/09/2019
i21st.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: 02/23/2021
i21st.cn is safe.
McAfee assesses i21st.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 i21st.cn for mature or inappropriate content, only security checks are evaluated.
Web of Trust
Last Updated: 01/09/2019
i21st.cn child safety is very good.
The WOT calculates reputation of the i21st.cn. This reputation system receives ratings from users and information from third-party sources, assesses the i21st.cn for safety features and confirms, whether i21st.cn is suitable for children.
SSL Information
SSL Checker Tool
Domain*.i21st.cn
Issuer OrganizationGlobalSign nv-sa
IssuerGlobalSign RSA OV SSL CA 2018
AlgorithmRSA-SHA256
Valid form01/03/2024
Expiration02/03/2025
SignedCertificate is not self signed
Additional Domains *.i21st.cn
owa.i21st.cn
mail.i21st.cn
autodiscover.i21st.cn
www.i21st.cn
i21st.cn
Server Location
Geolocation Tool
ASN Information
ASN Lookup Tool

ASN ID: 9808
ASN Title: China Mobile

Last Update: 07/18/2024

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

% Information related to 'AS9216 - AS10239'

as-block: AS9216 - AS10239
descr: APNIC ASN block
remarks: These AS numbers are further assigned by APNIC
remarks: to APNIC members and end-users in the APNIC region
admin-c: HM20-AP
tech-c: HM20-AP
mnt-by: APNIC-HM
mnt-lower: APNIC-HM
last-modified: 2009-05-19T07:00:23Z
source: APNIC

role: APNIC Hostmaster
address: 6 Cordelia Street
address: South Brisbane
address: QLD 4101
country: AU
phone: +61 7 3858 3100
fax-no: +61 7 3858 3199
e-mail: helpdesk@apnic.net
admin-c: AMS11-AP
tech-c: AH256-AP
nic-hdl: HM20-AP
remarks: Administrator for APNIC
notify: hostmaster@apnic.net
mnt-by: MAINT-APNIC-AP
last-modified: 2013-10-23T04:06:51Z
source: APNIC

% Information related to 'AS9800 - AS9819'

as-block: AS9800 - AS9819
descr: CNNIC ASN block
country: CN
remarks: These AS numbers are further assigned by CNNIC
remarks: to CNNIC members and end-users in China
admin-c: IPAS1-AP
tech-c: IPAS1-AP
mnt-by: APNIC-HM
mnt-lower: MAINT-CNNIC-AP
last-modified: 2008-09-04T06:40:26Z
source: APNIC

role: CNNIC IPAS CONFEDERATION
address: No.4, Zhongguancun No.4 South Street,
address: Haidian District, Beijing
country: CN
phone: +86-010-58813000
fax-no: +86-010-58813075
e-mail: ipas@cnnic.cn
admin-c: IP50-AP
tech-c: IP50-AP
nic-hdl: IPAS1-AP
mnt-by: MAINT-CNNIC-AP
last-modified: 2013-09-12T07:40:01Z
source: APNIC

% Information related to 'AS9808'

% Abuse contact for 'AS9808' is 'abuse@chinamobile.com'

aut-num: AS9808
as-name: CMNET-GD
descr: Guangdong Mobile Communication Co.Ltd.
country: CN
org: ORG-CM1-AP
import: from AS4134
action pref=10;
accept ANY
import: from AS4637
action pref=10;
accept ANY
import: from AS6453
action pref=10;
accept ANY
export: to AS4134
announce AS9808
export: to AS4637
announce AS9808
export: to AS6453
announce AS9808
admin-c: WL113-AP
tech-c: WL113-AP
mnt-by: MAINT-CN-CMCC
mnt-irt: IRT-CHINAMOBILE-CN
last-modified: 2017-10-16T00:26:24Z
source: APNIC

irt: IRT-CHINAMOBILE-CN
address: China Mobile Communications Corporation
address: 29, Jinrong Ave., Xicheng District, Beijing, 100032
e-mail: abuse@chinamobile.com
abuse-mailbox: abuse@chinamobile.com
admin-c: CT74-AP
tech-c: CT74-AP
auth: # Filtered
mnt-by: MAINT-CN-CMCC
last-modified: 2014-11-18T02:41:02Z
source: APNIC

organisation: ORG-CM1-AP
org-name: China Mobile
country: CN
address: 29, Jinrong Ave.
phone: +86-10-5260-6688
fax-no: +86-10-5261-6187
e-mail: hostmaster@chinamobile.com
mnt-ref: APNIC-HM
mnt-by: APNIC-HM
last-modified: 2017-08-23T12:56:36Z
source: APNIC

person: Weijian Li
address: 53A Xibianmennei Ave, Xuanwu Distract, Beijing, China , BJ 100031 CN
country: CN
phone: +86-10-63604841
fax-no: +86-10-63604946
e-mail: lidaiyong@chinamobile.com
nic-hdl: WL113-AP
mnt-by: MAINT-CNNIC-AP
last-modified: 2008-09-04T07:29:19Z
source: APNIC

% This query was served by the APNIC Whois Service version 1.88.15-46 (WHOIS-US4)

WHOIS
WHOIS Lookup Tool

Domain Name: i21st.cn
ROID: 20090224s10001s39958556-cn
Domain Status: clientTransferProhibited
Registrant: 21世纪报社
Registrant Contact Email: wangrujian@21stcentury.com.cn
Sponsoring Registrar: 阿里云计算有限公司（万网）
Name Server: vip3.alidns.com
Name Server: vip4.alidns.com
Registration Time: 2009-02-24 14:39:15
Expiration Time: 2026-02-24 14:39:15
DNSSEC: unsigned

DNS Records
DNS Lookup Tool
HostA RecordTTL
i21st.cn111.13.49.2023600
HostMX RecordPriorityTTL
i21st.cnmail.i21st.cn13600
HostNS RecordTTL
i21st.cndns30.hichina.com86400
i21st.cndns29.hichina.com86400
HostTXT RecordTTL
i21st.cnv=spf1 a mx ~all3600

dns29.hichina.com
TTL: 600
Email address: hostmaster.hichina.com
Serial: 1
Refresh: 3600
Retry: 1200
Expire: 3600
Minimum: 600

HTML Validation Tool
Errors
Warnings

Last tested: 12/12/2019

Desktop
Desktop Speed
68%
Desktop Resource Breakdown
Total Resources61
Number of Hosts5
Static Resources50
JavaScript Resources10
CSS Resources2

Last tested: 12/10/2019

Mobile
Mobile Usability
100%
Mobile Speed
90%
Mobile Resource Breakdown
Total Resources6
Number of Hosts2
Static Resources3
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