zhongkao.com - 北京学而思网络科技有限公司

Quick Summary

Online Status

Online

Server IP address resolved: Yes
Http response code: 200
Response time: 2.09 sec.
Last Checked: 02/04/2023

Over the time zhongkao.com has been ranked as high as 2,612 in the world, while most of its traffic comes from China, where it reached as high as 4,340 position.

Zhongkao.com receives about 3,248 unique visitors and 14,291 pageviews per day. The estimated value of zhongkao.com is 254,040 USD. Each unique visitor makes about 4.4 pageviews on average.

Zhongkao.com is registered under .COM top-level domain. Check other websites in .COM zone.

At the time of the last check (April 28, 2021) zhongkao.com has an expired wildcard SSL certificate issued by DigiCert Inc (expired on May 02, 2019). Check other websites using SSL certificates issued by DigiCert Inc.

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

Mobile-Friendly test indicates that zhongkao.com is well optimized for mobile and tablet devices, however website page loading time could be improved.

Zhongkao.com General Information

Global Rank

46,056

Average Load Time

1.24sec

Links In Count

241

Website Value

$254,040

Audience Geography. Where are zhongkao.com visitors located?

Country	Rank
China CN	4340
Malaysia MY	22726
United States US	456989

Country	Percent of Pageviews
China CN	98.4%
Malaysia MY	0.7%
United States US	0.5%
Other	0.5%

Country	Percent of Visitors
China CN	97.4%
United States US	0.8%
Malaysia MY	0.6%
Other	1.2%

Where do visitors go on zhongkao.com?

Subdomain	Pageviews
zhongkao.com	67.1%
school.zhongkao.com	4.66%
bj.zhongkao.com	1.96%
other	26.28%

Subdomain	Pageviews per User
zhongkao.com	5.8
school.zhongkao.com	2
bj.zhongkao.com	1

Subdomain	Reach
zhongkao.com	61.33%
school.zhongkao.com	10.67%
bj.zhongkao.com	9.64%

How popular is zhongkao.com?

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	52410	29028	14	-59.819%
30	46823	-16251	16	40%
7	69887	39763	10	-60.95%
1	49972	10275	20	-18.32%

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	38775	19967	17	-56.414%	4.4	9%
30	29038	-37607	24	170%	5.3	90%
7	45808	23175	14	-55.128%	5	10%
1	132941	114871	4	-88.838%	1	-86.31%

Period	Global Rank	Global Rank Delta
past 3 months	46056	25097
past month	39281	-21892
past week	59086	32765
yesterday	66710	36549

Zhongkao.com Alexa Rank History

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

Zhongkao.com Safety Information

Overview

Last Updated: 05/03/2024

Overall result - "zhongkao.com" 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

zhongkao.com is safe.

Norton ConnectSafe evaluates zhongkao.com for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 02/13/2019

zhongkao.com 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 "zhongkao.com".
"zhongkao.com" is not a phishing page.
"zhongkao.com" does not install unwanted software.
"zhongkao.com" 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: 02/22/2021

zhongkao.com is safe.

McAfee assesses zhongkao.com 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 zhongkao.com for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/09/2019

zhongkao.com child safety isvery good.

The WOT calculates reputation of the zhongkao.com. This reputation system receives ratings from users and information from third-party sources, assesses the zhongkao.com for safety features and confirms, whether zhongkao.com is suitable for children.

SSL Information

SSL Checker Tool

Domain	*.aoshu.com
Issuer Organization	DigiCert Inc
Issuer	RapidSSL RSA CA 2018
Algorithm	RSA-SHA256
Valid form	05/02/2018
Expiration	05/02/2019
Signed	Certificate is not self signed
Additional Domains	*.aoshu.com aoshu.com

Zhongkao.com Server Information

Server Location

Geolocation Tool

Beijing

China

ASN Information

ASN Lookup Tool

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

Last Update: 10/04/2023

ASN Whois

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

% Information related to 'AS37888 - AS38911'

as-block: AS37888 - AS38911
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: 2009-09-29T06:04:16Z
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 'AS37936 - AS37970'

as-block: AS37936 - AS37970
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 '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
admin-c: ZM678-AP
tech-c: ZM877-AP
tech-c: ZM876-AP
tech-c: ZM875-AP
import: from AS4837
action pref=100;
accept ANY
import: from AS4134
action pref=100;
accept ANY
export: to AS4837
announce AS37963
export: to AS4134
announce AS37963
mnt-routes: MAINT-CNNIC-AP
mnt-by: MAINT-CNNIC-AP
mnt-irt: IRT-CNNIC-CN
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
address: No.391 Wen'er Road, Hangzhou City
address: Zhejiang, China, 310099
country: CN
phone: +86-0571-85022600
fax-no: +86-0571-85022600
e-mail: shuo.yus@alibaba-inc.com
e-mail: shuo.yus@aliyun-inc.com
nic-hdl: ZM678-AP
mnt-by: MAINT-CNNIC-AP
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
phone: +86-0571-85022600
fax-no: +86-0571-85022600
e-mail: anti-spam@list.alibaba-inc.com
nic-hdl: ZM875-AP
mnt-by: MAINT-CNNIC-AP
last-modified: 2014-07-30T01:56:01Z
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
phone: +86-0571-85022600
country: CN
mnt-by: MAINT-CNNIC-AP
nic-hdl: ZM876-AP
last-modified: 2013-07-08T02:56:02Z
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
fax-no: +86-0571-85022600
e-mail: guowei.pangw@alibaba-inc.com
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)

Zhongkao.com Domain Name Information

WHOIS

WHOIS Lookup Tool

Domain Whois

Domain Name: ZHONGKAO.COM
Registry Domain ID: 97515105_DOMAIN_COM-VRSN
Registrar WHOIS Server: grs-whois.hichina.com
Registrar URL: http://www.net.cn
Updated Date: 2020-10-28T11:14:45Z
Creation Date: 2003-05-04T18:22:45Z
Registry Expiry Date: 2025-05-04T18:22:45Z
Registrar: Alibaba Cloud Computing (Beijing) Co., Ltd.
Registrar IANA ID: 420
Registrar Abuse Contact Email: DomainAbuse@service.aliyun.com
Registrar Abuse Contact Phone: +86.95187
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Name Server: DNS11.HICHINA.COM
Name Server: DNS12.HICHINA.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2021-05-03T05:26:16Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL
zhongkao.com	122.112.13.59	600

Host	MX Record	Priority	TTL
zhongkao.com	mx3.dns-diy.com	10	600
zhongkao.com	mx1.dns-diy.com	10	600

Host	NS Record	TTL
zhongkao.com	dns12.hichina.com	86400
zhongkao.com	dns11.hichina.com	86400

Host	TXT Record	TTL

dns11.hichina.com
TTL: 600
Email address: hostmaster.hichina.com
Serial: 2017082811
Refresh: 3600
Retry: 1200
Expire: 86400
Minimum: 360

Zhongkao.com HTML Validation

HTML Validation Tool

Errors

Malformed byte sequence: “d6”.

Malformed byte sequence: “bc”.

Malformed byte sequence: “cd”.

Malformed byte sequence: “f8”.

Malformed byte sequence: “e4”.

Malformed byte sequence: “b7”.

Malformed byte sequence: “ca”.

Malformed byte sequence: “fd”.

Malformed byte sequence: “cf”.

Malformed byte sequence: “df”.

Malformed byte sequence: “b3”.

Malformed byte sequence: “a8”.

Malformed byte sequence: “b2”.

Malformed byte sequence: “e9”.

Malformed byte sequence: “d5”.

Malformed byte sequence: “fe”.

Malformed byte sequence: “c2”.

Malformed byte sequence: “fa”.

Malformed byte sequence: “d7”.

Malformed byte sequence: “f7”.

Malformed byte sequence: “ce”.

Malformed byte sequence: “c4”.

Malformed byte sequence: “cc”.

Malformed byte sequence: “e5”.

Malformed byte sequence: “d3”.

Malformed byte sequence: “da”.

Malformed byte sequence: “b5”.

Malformed byte sequence: “c3”.

Malformed byte sequence: “a7”.

Malformed byte sequence: “b9”.

Malformed byte sequence: “e3”, “b4”.

Malformed byte sequence: “f3”, “bf”, “bc”.

Malformed byte sequence: “c9”.

Malformed byte sequence: “a1”.

Malformed byte sequence: “a2”.

Malformed byte sequence: “b1”.

Malformed byte sequence: “fb”.

Malformed byte sequence: “d4”.

Malformed byte sequence: “e2”, “b4”.

Malformed byte sequence: “c8”.

Malformed byte sequence: “ea”.

Malformed byte sequence: “b0”.

Malformed byte sequence: “a3”.

Internal encoding declaration “gb2312” disagrees with the actual encoding of the document (“utf-8”).

Bad value “gb2312” for attribute “charset” on element “meta”: “gb2312” is not a preferred encoding name. The preferred label for this encoding is “gbk”.

Bad value “mobile-agent” for attribute “http-equiv” on element “meta”.

A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.

Malformed byte sequence: “c7”.

Malformed byte sequence: “bb”.

Malformed byte sequence: “e6”.

Malformed byte sequence: “e2”.

Malformed byte sequence: “e2”, “b2”.

Malformed byte sequence: “ae”.

Malformed byte sequence: “e3”, “bb”.

Malformed byte sequence: “e4”, “af”.

Malformed byte sequence: “c0”.

Malformed byte sequence: “c1”.

Malformed byte sequence: “bf”.

Attribute “eid” not allowed on element “dt” at this point.

Element “dl” is missing a required instance of child element “dd”.

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

Malformed byte sequence: “b8”.

Malformed byte sequence: “e3”, “b8”.

Malformed byte sequence: “d0”.

Malformed byte sequence: “f5”.

Malformed byte sequence: “ba”.

Malformed byte sequence: “fc”.

Malformed byte sequence: “be”.

Malformed byte sequence: “e2”, “bf”.

Malformed byte sequence: “e3”, “bf”.

Malformed byte sequence: “ef”.

Malformed byte sequence: “ed”.

Malformed byte sequence: “af”.

Malformed byte sequence: “b6”.

Malformed byte sequence: “db”.

Malformed byte sequence: “f1”, “ba”.

Malformed byte sequence: “c6”.

Malformed byte sequence: “ec”.

Malformed byte sequence: “cb”.

Malformed byte sequence: “e1”.

Malformed byte sequence: “ad”.

Malformed byte sequence: “d1”.

Malformed byte sequence: “a4”.

Malformed byte sequence: “d2”.

Malformed byte sequence: “d8”.

Malformed byte sequence: “a9”.

Malformed byte sequence: “e3”.

Malformed byte sequence: “dd”.

Malformed byte sequence: “ee”.

Malformed byte sequence: “ec”, “bd”.

Malformed byte sequence: “f2”.

Malformed byte sequence: “bd”.

Malformed byte sequence: “b4”.

Malformed byte sequence: “e2”, “b5”.

Malformed byte sequence: “e1”, “bc”.

Malformed byte sequence: “e3”, “b7”.

Malformed byte sequence: “f6”.

Malformed byte sequence: “f4”.

Malformed byte sequence: “ef”, “bd”.

Warnings

Text run starts with a composing character.

Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)

NON-DOCUMENT-ERROR

Too many messages.

Zhongkao.com Desktop Insights

Desktop Page Insights Tool

Last tested: 10/11/2016

Desktop

Desktop Speed

Optimize images

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

Leverage browser caching

Minify JavaScript

Minify CSS

Desktop Resource Breakdown

Total Resources	133
Number of Hosts	16
Static Resources	119
JavaScript Resources	27
CSS Resources	3

Zhongkao.com Mobile Insights

Mobile Page Insights Tool

Last tested: 10/11/2016

Mobile

Mobile Usability

98%

Size tap targets appropriately

Mobile Speed

48%

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

Avoid landing page redirects

Optimize images

Leverage browser caching

Prioritize visible content

Minify JavaScript

Minify CSS

Mobile Resource Breakdown

Total Resources	35
Number of Hosts	12
Static Resources	26
JavaScript Resources	11
CSS Resources	1

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Zhongkao.com 北京学而思网络科技有限公司

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Quick Summary

Zhongkao.com General Information

Zhongkao.com Alexa Rank History

Zhongkao.com Safety Information

Zhongkao.com Server Information

Zhongkao.com Domain Name Information

Zhongkao.com HTML Validation

Zhongkao.com Desktop Insights

Zhongkao.com Mobile Insights

Zhongkao.com Nearest Competitors

Zhongkao.com Typos