21cnjy.com 21世纪教育网(二一教育)-试题,课件,教案,学案、高中考资源下载

国内排名前列的中小学教育资源网,提供全国中小学各版本教材的课件教案学案备课素材试卷练习等资源下载。资源多、时效强、质量高,是中小学老师学生们的最佳选择

21cnjy.com Overview

21cnjy.com is an educational website that provides resources for primary and secondary school teachers and students in China. The website has a simple and user-friendly structure, with a clear menu and search function that allow users to easily access the content they need.

The homepage of the website provides information about the various resources available, including test questions, lesson plans, and teaching materials. The website also has sections dedicated to different subjects, such as Chinese, English, and mathematics, making it easy for users to find specific materials related to their area of study.

The website offers a wide range of resources, including downloadable materials such as test papers, teaching aids, and audiovisual materials. These materials are organized by grade level and subject matter, making it easy for users to find appropriate resources for their needs.

One of the strengths of 21cnjy.com is the high quality of its resources. The website has a team of experienced educators who create and curate the materials available on the site. In addition, the website has a strong focus on providing up-to-date resources that reflect the latest changes to the national curriculum.

Another key feature of the website is its user community. Users can create accounts on the website and contribute their own materials, as well as share their experiences and insights with other users. The website also has a forum where users can ask questions and exchange ideas.

Overall, 21cnjy.com is a valuable resource for teachers and students in China. Its vast collection of high-quality educational materials and strong user community make it an excellent choice for anyone looking to enhance their teaching or learning experience. Although the website's PageSpeed Insights score is only 41, which is a fairly low score, it is still a reliable and trustworthy source for educational resources. Moreover, the fact that the site is hosted by China Mobile hosting and has a .COM Top Level Domain adds to its credibility. Lastly, with its family-friendly resources, the site is a safe and appropriate choice for children and young students.

21cnjy.com Rank Summary

Global Rank
36,018
Average Load Time
2.28sec
Links In Count
286
Website Value
$324,444

21cnjy.com Website Safety

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Overview
Last Updated: 01/09/2026
Overall result - 21cnjy.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 logo
Norton Connect Safe
Last Updated: 03/22/2025
21cnjy.com is safe.
Norton ConnectSafe evaluates 21cnjy.com for any unsafe and insecure content. The results are critical for families with young children.
Google logo
Google Safe Search
Last Updated: 10/16/2016
21cnjy.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 brwosing logo
Google Safe Browsing
Last Updated: 01/09/2019
21cnjy.com 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.
McAfee logo
Site Advisor
Last Updated: 02/22/2021
21cnjy.com is safe.
McAfee assesses 21cnjy.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 21cnjy.com for mature or inappropriate content, only security checks are evaluated.
Web of trust logo
Web of Trust
Last Updated: 01/09/2019
21cnjy.com child safety is very good.
The WOT calculates reputation of the 21cnjy.com. This reputation system receives ratings from users and information from third-party sources, assesses the 21cnjy.com for safety features and confirms, whether 21cnjy.com is suitable for children.

SSL Information
Domain*.21cnjy.com
Issuer OrganizationSectigo Limited
IssuerSectigo RSA Organization Validation Secure Server CA
AlgorithmRSA-SHA256
Valid form06/07/2024
Expiration07/08/2025
SignedCertificate is not self signed
Additional Domains *.21cnjy.com
21cnjy.com

21cnjy.com Rank History

21cnjy.com Hosting Information

Server Location

ASN Information

Last Update: 12/16/2025

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

% Information related to 'AS55296 - AS56319'

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source: APNIC

% Information related to 'AS56045'

% Abuse contact for 'AS56045' is 'abuse@chinamobile.com'

aut-num: AS56045
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descr: China Mobile communications corporation
descr: the IP core network of China Mobile Group Jiangxi Company
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last-modified: 2020-07-15T13:09:54Z
source: APNIC

irt: IRT-CHINAMOBILE2-CN
address: China Mobile Communications Corporation
address: 29, Jinrong Ave., Xicheng District, Beijing, 100032
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source: APNIC

organisation: ORG-CMCC1-AP
org-name: China Mobile Communications Corporation
org-type: LIR
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role: ABUSE CHINAMOBILE2CN
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last-modified: 2025-09-15T02:20:14Z
source: APNIC

person: haijun li
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e-mail: hostmaster@chinamobile.com
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last-modified: 2016-11-29T09:38:38Z
source: APNIC

% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-US2)

21cnjy.com Domain Registration and Settings

WHOIS

Domain Name: 21CNJY.COM
Registry Domain ID: 555396524_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.bizcn.com
Registrar URL: http://www.bizcn.com
Updated Date: 2024-07-16T03:00:02Z
Creation Date: 2006-08-15T13:57:21Z
Registry Expiry Date: 2027-08-15T13:57:21Z
Registrar: Bizcn.com, Inc.
Registrar IANA ID: 471
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS3.DNSV2.COM
Name Server: NS4.DNSV2.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-09-13T07:24:26Z


DNS Records
HostA RecordTTL
21cnjy.com117.169.66.187600
HostMX RecordPriorityTTL
21cnjy.commail.21cnjy.com5600
HostNS RecordTTL
21cnjy.comns4.dnsv2.com86400
21cnjy.comns3.dnsv2.com86400
HostTXT RecordTTL
21cnjy.comv=spf1 a mx ip4:117.169.66.114 ~all600

ns3.dnsv2.com
TTL: 600
Email address: level3dnsadmin.dnspod.com
Serial: 1564535585
Refresh: 3600
Retry: 180
Expire: 1209600
Minimum: 180

21cnjy.com HTML Check

NON-DOCUMENT-ERROR

21cnjy.com Desktop Performance

Last tested: 12/11/2019

Speedometer image
Desktop Speed
19%

Desktop Resource Breakdown
Total Resources78
Number of Hosts6
Static Resources51
JavaScript Resources11
CSS Resources4

21cnjy.com Mobile Insights

Last tested: 12/11/2019

Speedometer image
Mobile Usability
100%
Speedometer image
Mobile Speed
41%

Mobile Resource Breakdown
Total Resources33
Number of Hosts6
Static Resources18
JavaScript Resources7
CSS Resources2

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