Status
Online
Server IP address resolved: Yes
Http response code: 200
Response time: 3.97 sec.
Last Checked: 04/25/2024
21tb.com traffic estimate is about 11,110 unique visitors and 44,440 pageviews per day. The approximated value of 21tb.com is 66,960 USD. Every unique visitor makes about 4 pageviews on average.
Alexa Traffic Rank estimates that 21tb.com is ranked number 821 in the world.
21tb.com server is located in China, but, unfortunately, we cannot identify the countries where the visitors come from and thus it’s impossible to define if the distance can potentially affect the page load time. See the list of other websites hosted by CHINA169-BJ China Unicom Beijing Province Network, CN.
21tb.com is registered under .COM top-level domain. Check other websites in .COM zone.
During the last check (November 14, 2019) 21tb.com has an expired wildcard SSL certificate issued by DigiCert Inc (expired on June 08, 2020), please click the “Refresh” button for SSL Information at the Safety Information section. Check other websites using SSL certificates issued by DigiCert Inc.
In accordance with Google Safe Browsing and Symantec 21tb.com is pretty a safe domain.
Relying on Google Mobile-Friendly test 21tb.com is well optimized for mobile and tablet devices, however website page loading time may be improved.
Where are website visitors coming from?
| Country | Visitors |
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| Country | Pageviews |
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| Country | Rank |
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Where do visitors go on 21tb.com?
| Subdomain | Pageviews |
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| Subdomain | Views per User |
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| Subdomain | Reach |
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How popular is 21tb.com?
| Period | Global Rank | Global Rank Delta |
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| Days | Pageviews Rank | Pageviews Rank Delta | Pageviews per Million | Pageviews per Million Delta | Pageviews per User | Pageviews per User Delta |
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| Days | Reach Rank | Reach Rank Delta | Reach per Million | Reach per Million Delta |
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Press rescan to collect fresh statistics for this website...
(Rescan now...)Rankchart Summary
Unknown
Updated: 04/25/2024
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
Safe
Updated: 03/22/2024
Norton ConnectSafe evaluates websites for any unsafe and inapropriate content. The results are important for families with young children.
Google Safe Search
Unknown
Updated: 04/25/2024
SafeSearch works as a parental control tool to filter out any content that might be inappropriate for your children.
Google Safe Browsing
Safe
Malware not found
Phishing not detected
Unwanted software not found
Harmfull applications not found
Updated: 01/09/2019
Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.
McAfee® WebAdvisor
Safe
Updated: 02/22/2021
McAfee assesses 21tb.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 21tb.com for mature or inappropriate content, only security checks are evaluated.
Web of Trust
Not Checked
Updated: 04/25/2024
The WOT calculates reputation of the 21tb.com. This reputation system receives ratings from users and information from third-party sources, assesses the 21tb.com for safety features and confirms, whether 21tb.com is suitable for children.
| Domain | *.21tb.com |
| Issuer Organization | DigiCert Inc |
| Issuer | GeoTrust RSA CA 2018 |
| Algorithm | RSA-SHA256 |
| Valid form | 04/10/2018 |
| Expiration | 06/08/2020 |
| Signed | Certificate is not self signed |
| Additional Domains | *.21tb.com 21tb.com |
ASN ID: 4808
ASN Title: CHINA169-BJ China Unicom Beijing Province Network, CN
Updated: 10/03/2023
% [whois.apnic.net]
% Whois data copyright terms http://www.apnic.net/db/dbcopyright.html
% Information related to 'AS4608 - AS4864'
as-block: AS4608 - AS4864
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: 2008-09-04T06:40:26Z
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 'AS4808'
% Abuse contact for 'AS4808' is 'hqs-ipabuse@chinaunicom.cn'
aut-num: AS4808
as-name: CHINA169-BJ
descr: China Unicom Beijing Province Network
country: CN
member-of: AS4837:AS-CNCGROUP
import: from AS4837
action pref=100;
accept ANY
import: from AS9929
action pref=100;
accept AS4814
export: to AS4837
announce AS4808
export: to AS9929
announce AS4808
admin-c: CH1302-AP
tech-c: CH1302-AP
mnt-by: MAINT-CNCGROUP
mnt-irt: IRT-CU-CN
mnt-routes: MAINT-CNCGROUP-RR
last-modified: 2016-05-18T08:44:24Z
source: APNIC
irt: IRT-CU-CN
address: No.21,Financial Street
address: Beijing,100033
address: P.R.China
e-mail: hqs-ipabuse@chinaunicom.cn
abuse-mailbox: hqs-ipabuse@chinaunicom.cn
admin-c: CH1302-AP
tech-c: CH1302-AP
auth: # Filtered
mnt-by: MAINT-CNCGROUP
last-modified: 2017-10-23T05:59:13Z
source: APNIC
person: ChinaUnicom Hostmaster
nic-hdl: CH1302-AP
e-mail: hqs-ipabuse@chinaunicom.cn
address: No.21,Jin-Rong Street
address: Beijing,100033
address: P.R.China
phone: +86-10-66259764
fax-no: +86-10-66259764
country: CN
mnt-by: MAINT-CNCGROUP
last-modified: 2017-08-17T06:13:16Z
source: APNIC
% This query was served by the APNIC Whois Service version 1.88.15-46 (WHOIS-US4)
Information about registered users or assignees of an Internet resource
Domain Name: 21TB.COM
Registry Domain ID: 89388819_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.paycenter.com.cn
Registrar URL: http://www.xinnet.com
Updated Date: 2020-07-21T08:39:40Z
Creation Date: 2002-08-16T06:06:36Z
Registry Expiry Date: 2023-08-16T06:06:36Z
Registrar: Xin Net Technology Corporation
Registrar IANA ID: 120
Registrar Abuse Contact Email: supervision@xinnet.com
Registrar Abuse Contact Phone: +86.1087127926
Domain Status: ok https://icann.org/epp#ok
Name Server: 21TB-NS1.CNELN.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2021-04-26T18:44:26Z
Website desktop performance and usability tips
Speed
0%
Number and type of the resources loaded from the website:
| Total Resources | 94 |
| Number of Hosts | 14 |
| Static Resources | 80 |
| JavaScript Resources | 19 |
| CSS Resources | 8 |
| CSS | 201.0 KBytes |
| Images | 8.0 MBytes |
| HTML | 54.5 KBytes |
| JavaScript | 477.6 KBytes |
| Other | 1.6 KBytes |
Updated: 06/13/2017
Tips on speeding up mobile site performance
Usability
98%
Speed
25%
Number and type of the resources loaded from the website:
| Total Resources | 91 |
| Number of Hosts | 16 |
| Static Resources | 70 |
| JavaScript Resources | 26 |
| CSS Resources | 9 |
| CSS | 190.6 KBytes |
| Images | 4.4 MBytes |
| HTML | 48.2 KBytes |
| JavaScript | 529.0 KBytes |
| Other | 798.0 Bytes |
Updated: 08/27/2016