Qdc.edu.cn 青岛理工大学琴岛学院
Qdc.edu.cn Overview
Qdc.edu.cn belongs to ERX-CERNET-BKB China Education and Research Network Center, CN. Check the list of other websites hosted by ERX-CERNET-BKB China Education and Research Network Center, CN.
In terms of rank-to-traffic ratio, qdc.edu.cn has 1,557 unique users per day, viewing 3,145 pages. The rank based value of qdc.edu.cn is 2,333 USD. Every user makes 2.16 pageviews on average.
Qdc.edu.cn boasts a link base consisting of 233 referring domains and 241 external backlinks, as revealed by the data obtained from web network scanning.
Qdc.edu.cn top-level domain belongs to .CN domain zone. Check other webpages in .CN zone.
According the last verification test in September 10, 2024, qdc.edu.cn has an expired wildcard SSL certificate issued by DigiCert Inc (expired on August 30, 2025). Click button “Update” SSL Information at the Safety Information section. Check the list of websites using SSL by DigiCert Inc.
Based on data from Google Safe Browsing, Google Safe Search and Symantec qdc.edu.cn is a fairly safe domain.
According the Mobile-Friendly test by Google qdc.edu.cn is nice optimized for mobile devices and tablets, however the webpage speed could be improved.
Qdc.edu.cn Website Safety
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 ConnectSafe evaluates qdc.edu.cn for any unsafe and insecure content. The results are critical for families with young children.
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.
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 assesses qdc.edu.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 qdc.edu.cn for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the qdc.edu.cn. This reputation system receives ratings from users and information from third-party sources, assesses the qdc.edu.cn for safety features and confirms, whether qdc.edu.cn is suitable for children.
| Domain | *.qdc.edu.cn |
| Issuer Organization | DigiCert Inc |
| Issuer | DigiCert Basic RSA CN CA G2 |
| Algorithm | RSA-SHA256 |
| Valid form | 08/08/2024 |
| Expiration | 08/30/2025 |
| Signed | Certificate is not self signed |
| Additional Domains |
*.qdc.edu.cn qdc.edu.cn |
Qdc.edu.cn Rank History
Alexa Rank shows how popular qdc.edu.cn is in comparison with other sites. The most popular site has Alexa Rank equals 1. If qdc.edu.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 qdc.edu.cn and pageviews on qdc.edu.cn over the past 3 months.
Qdc.edu.cn Hosting Information
ASN ID: 4538
ASN Title: ERX-CERNET-BKB China Education and Research Network Center, CNLast Update: 09/06/2025
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to 'AS4538'
% Abuse contact for 'AS4538' is 'abuse@net.edu.cn'
aut-num: AS4538
as-name: ERX-CERNET-BKB
descr: China Education and Research Network Center
descr: Tsinghua University
descr: Beijing 100084
country: CN
admin-c: JW410-AP
tech-c: JW410-AP
remarks: This aut-num object created as part of
remarks: the ER-Transfer from ARIN
mnt-by: MAINT-CERNET-AP
mnt-irt: IRT-CERNET-AP
mnt-routes: MAINT-CERNET-AP
last-modified: 2016-10-17T00:30:08Z
source: APNIC
irt: IRT-CERNET-AP
address: Network Research Center,
address: Main Bldg, Tsinghua Univ
address: Beijing 100084, China
phone: +86-10-62784301
fax-no: +86-10-62785933
e-mail: abuse@net.edu.cn
abuse-mailbox: abuse@net.edu.cn
admin-c: CER-AP
tech-c: CER-AP
auth: # Filtered
remarks: timezone GMT+8
remarks: http://www.ccert.edu.cn
mnt-by: MAINT-CERNET-AP
last-modified: 2010-11-26T03:14:01Z
source: APNIC
person: Jianping Wu
address: China Education and Research Network Center
address: Tsinghua University
address: Beijing 100084
country: CN
phone: +86-10-2595931
e-mail: jianping@CERNET.EDU.CN
nic-hdl: JW410-AP
remarks: This person object created as part of the ER-Transfer from ARIN
mnt-by: MAINT-CN-CERNET
last-modified: 2008-09-04T07:29:20Z
source: APNIC
% This query was served by the APNIC Whois Service version 1.88.15-46 (WHOIS-US3)
Qdc.edu.cn Domain Registration and Settings
Out of this registry.
| Host | A Record | TTL |
|---|---|---|
| qdc.edu.cn | 42.247.3.48 | 3600 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| qdc.edu.cn | mxbiz1.qq.com | 5 | 3600 |
| qdc.edu.cn | mxbiz2.qq.com | 10 | 3600 |
| Host | NS Record | TTL |
|---|---|---|
| qdc.edu.cn | ns1.qdc.edu.cn | 3600 |
| Host | TXT Record | TTL |
|---|---|---|
| qdc.edu.cn | v=spf1 include:spf.mail.qq.com ~all | 3600 |
ns1.qdc.edu.cn
TTL: 3600
Email address: dnsadmin.qdc.edu.cn
Serial: 190057
Refresh: 3600
Retry: 1800
Expire: 1209600
Minimum: 3600
Qdc.edu.cn HTML Check
Qdc.edu.cn Desktop Performance
Last tested: 08/06/2018
| Total Resources | 28 |
| Number of Hosts | 3 |
| Static Resources | 22 |
| JavaScript Resources | 5 |
| CSS Resources | 3 |
Qdc.edu.cn Mobile Insights
Last tested: 08/06/2018
| Total Resources | 28 |
| Number of Hosts | 3 |
| Static Resources | 22 |
| JavaScript Resources | 5 |
| CSS Resources | 3 |
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