i21st.cn - 21英语网-21世纪报官方网站

Quick Summary

Online Status

Online

Server IP address resolved: Yes
Http response code: 200
Response time: 2.02 sec.
Last Checked: 06/14/2024

Over the time i21st.cn has been ranked as high as 5,181 in the world, while most of its traffic comes from China, where it reached as high as 7,969 position.

I21st.cn receives about 3,253 unique visitors and 8,458 pageviews per day. The estimated value of i21st.cn is 148,920 USD. Each unique visitor makes about 2.6 pageviews on average.

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

At the time of the last check (August 20, 2024) i21st.cn has a valid and up-to-date wildcard SSL certificate issued by GlobalSign nv-sa that expires on February 03, 2025. Check other websites using SSL certificates issued by GlobalSign nv-sa.

According to Google Safe Browsing, Google Safe Search, Symantec and Web of Trust i21st.cn is quite a safe domain.

Mobile-Friendly test indicates that i21st.cn is well optimized for mobile and tablet devices.

I21st.cn General Information

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	Rank
China CN	7969
Hong Kong HK	25815
Taiwan TW	42438
United States US	310976

Country	Percent of Pageviews
China CN	96.1%
United States US	0.9%
Hong Kong HK	0.6%
Taiwan TW	0.5%
Other	1.9%

Country	Percent of Visitors
China CN	87.2%
United States US	3%
Hong Kong HK	1.8%
Taiwan TW	1.5%
Other	6.4%

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?

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	80010	18510	88	-27.33%
30	69759	-26857	10	50%
7	56367	-16431	13	30%
1	45298	-2948	20	6%

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	91403	38726	61	-48.295%	2.6	-28.93%
30	64812	-56697	93	120%	3.3	50%
7	38031	-15350	18	50%	4.9	10%
1	91667	62714	7	-72.989%	1	-74.653%

Period	Global Rank	Global Rank Delta
past 3 months	79833	23504
past month	65134	-34537
past week	47944	-15287
yesterday	53769	14364

I21st.cn Alexa Rank History

Alexa Rank shows how popular i21st.cn is in comparison with other sites. The most popular site has Alexa Rank equals 1. If i21st.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 i21st.cn and pageviews on i21st.cn over the past 3 months.

I21st.cn Safety Information

Overview

Last Updated: 11/05/2024

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

Malware not found at "i21st.cn".
"i21st.cn" is not a phishing page.
"i21st.cn" does not install unwanted software.
"i21st.cn" does not contain harmfull applications.
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 isvery 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 Organization	GlobalSign nv-sa
Issuer	GlobalSign RSA OV SSL CA 2018
Algorithm	RSA-SHA256
Valid form	01/03/2024
Expiration	02/03/2025
Signed	Certificate is not self signed
Additional Domains	*.i21st.cn owa.i21st.cn mail.i21st.cn autodiscover.i21st.cn www.i21st.cn i21st.cn

I21st.cn Server Information

Server Location

Geolocation Tool

Beijing

China

ASN Information

ASN Lookup Tool

ASN ID: 9808
ASN Title: China Mobile

Last Update: 07/18/2024

ASN Whois

% [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)

I21st.cn Domain Name Information

WHOIS

WHOIS Lookup Tool

Domain Whois

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

Host	A Record	TTL
i21st.cn	111.13.49.202	3600

Host	MX Record	Priority	TTL
i21st.cn	mail.i21st.cn	1	3600

Host	NS Record	TTL
i21st.cn	dns30.hichina.com	86400
i21st.cn	dns29.hichina.com	86400

Host	TXT Record	TTL
i21st.cn	v=spf1 a mx ~all	3600

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

I21st.cn HTML Validation

HTML Validation Tool

Errors

Obsolete doctype. Expected “<!DOCTYPE html>”.

The “center” element is obsolete. Use CSS instead.

The “width” attribute on the “table” element is obsolete. Use CSS instead.

The “width” attribute on the “td” element is obsolete. Use CSS instead.

No space between attributes.

Quote “'” in attribute name. Probable cause: Matching quote missing somewhere earlier.

Attribute “0'” not allowed on element “img” at this point.

The “align” attribute on the “img” element is obsolete. Use CSS instead.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

The “font” element is obsolete. Use CSS instead.

Stray end tag “font”.

Element “div” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)

Stray end tag “span”.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “clear” attribute on the “br” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

Attribute “name” not allowed on element “div” at this point.

The “summary” attribute on the “table” element is obsolete. Consider describing the structure of the “table” in a “caption” element or in a “figure” element containing the “table”; or, simplify the structure of the “table” so that no description is needed.

Attribute “name” not allowed on element “td” at this point.

Warnings

The “type” attribute is unnecessary for JavaScript resources.

The “language” attribute on the “script” element is obsolete. You can safely omit it.

Attribute “0'” is not serializable as XML 1.0.

The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.

I21st.cn Desktop Insights

Desktop Page Insights Tool

Last tested: 12/12/2019

Desktop

Desktop Speed

68%

Optimize images

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Enable compression

Leverage browser caching

Minify JavaScript

Minify CSS

Desktop Resource Breakdown

Total Resources	61
Number of Hosts	5
Static Resources	50
JavaScript Resources	10
CSS Resources	2

I21st.cn Mobile Insights

Mobile Page Insights Tool

Last tested: 12/10/2019

Mobile

Mobile Usability

100%

Mobile Speed

90%

Avoid landing page redirects

Optimize images

Mobile Resource Breakdown

Total Resources	6
Number of Hosts	2
Static Resources	3

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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。

Quick Summary

I21st.cn General Information

I21st.cn Alexa Rank History

I21st.cn Safety Information

I21st.cn Server Information

I21st.cn Domain Name Information

I21st.cn HTML Validation

I21st.cn Desktop Insights

I21st.cn Mobile Insights

I21st.cn Nearest Competitors

I21st.cn Typos