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.





| Domain | *.21cnjy.com |
| Issuer Organization | Sectigo Limited |
| Issuer | Sectigo RSA Organization Validation Secure Server CA |
| Algorithm | RSA-SHA256 |
| Valid form | 06/07/2024 |
| Expiration | 07/08/2025 |
| Signed | Certificate is not self signed |
| Additional Domains |
*.21cnjy.com 21cnjy.com |
Alexa Rank shows how popular 21cnjy.com is in comparison with other sites. The most popular site has Alexa Rank equals 1. If 21cnjy.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 21cnjy.com and pageviews on 21cnjy.com over the past 3 months.
ASN ID: 56045
ASN Title: China Mobile Communications CorporationLast Update: 12/16/2025
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
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mnt-lower: APNIC-HM
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source: APNIC
role: APNIC Hostmaster
address: 6 Cordelia Street
address: South Brisbane
address: QLD 4101
country: AU
phone: +61 7 3858 3100
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source: APNIC
% Information related to 'AS56045'
% Abuse contact for 'AS56045' is 'abuse@chinamobile.com'
aut-num: AS56045
as-name: CMNET-Jiangxi-AP
descr: China Mobile communications corporation
descr: the IP core network of China Mobile Group Jiangxi Company
descr: Telecommunication Service Provider
descr: Jiangxi
country: CN
remarks: Please send abuse e-mail to abuse@chinamobile.com
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mnt-irt: IRT-CHINAMOBILE2-CN
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
e-mail: abuse@chinamobile.com
abuse-mailbox: abuse@chinamobile.com
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auth: # Filtered
remarks: abuse@chinamobile.com was validated on 2025-09-15
mnt-by: MAINT-CN-CMCC
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source: APNIC
organisation: ORG-CMCC1-AP
org-name: China Mobile Communications Corporation
org-type: LIR
country: CN
address: 29,Jinrong Ave.,
address: Xicheng District,
phone: +861052686688
fax-no: +861052616187
e-mail: hostmaster@chinamobile.com
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source: APNIC
role: ABUSE CHINAMOBILE2CN
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address: China Mobile Communications Corporation
address: 29, Jinrong Ave., Xicheng District, Beijing, 100032
phone: +000000000
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remarks: abuse@chinamobile.com was validated on 2025-09-15
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mnt-by: APNIC-ABUSE
last-modified: 2025-09-15T02:20:14Z
source: APNIC
person: haijun li
nic-hdl: HL1318-AP
e-mail: hostmaster@chinamobile.com
address: 29,Jinrong Ave, Xicheng district,beijing,100032
phone: +86 1052686688
fax-no: +86 10 52616187
country: CN
mnt-by: MAINT-CN-CMCC
abuse-mailbox: abuse@chinamobile.com
last-modified: 2016-11-29T09:38:38Z
source: APNIC
% This query was served by the APNIC Whois Service version 1.88.34 (WHOIS-US2)
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
| Host | A Record | TTL |
|---|---|---|
| 21cnjy.com | 117.169.66.187 | 600 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| 21cnjy.com | mail.21cnjy.com | 5 | 600 |
| Host | NS Record | TTL |
|---|---|---|
| 21cnjy.com | ns4.dnsv2.com | 86400 |
| 21cnjy.com | ns3.dnsv2.com | 86400 |
| Host | TXT Record | TTL |
|---|---|---|
| 21cnjy.com | v=spf1 a mx ip4:117.169.66.114 ~all | 600 |
ns3.dnsv2.com
TTL: 600
Email address: level3dnsadmin.dnspod.com
Serial: 1564535585
Refresh: 3600
Retry: 180
Expire: 1209600
Minimum: 180
Last tested: 12/11/2019

| Total Resources | 78 |
| Number of Hosts | 6 |
| Static Resources | 51 |
| JavaScript Resources | 11 |
| CSS Resources | 4 |
Last tested: 12/11/2019


| Total Resources | 33 |
| Number of Hosts | 6 |
| Static Resources | 18 |
| JavaScript Resources | 7 |
| CSS Resources | 2 |