21ic.com 21IC电子网 - 电子工程师的优选网站

21IC电子网,电子工程师的优选网站(嵌入式,单片机,DSP,EDA,测试测量,元器件,医疗电子,智能电网)


Online Status
Online

Server IP address resolved: Yes
Http response code: 200
Response time: 1.38 sec.
Last Checked: 03/28/2024

21ic.com traffic volume is 25,568 unique daily visitors and their 69,033 pageviews. The web value rate of 21ic.com is 1,209,143 USD. Each visitor makes around 2.89 page views on average.

By Alexa's traffic estimates 21ic.com placed at 1,233 position over the world, while the largest amount of its visitors comes from China, where it takes 1,312 place.

Perfect for 21ic.com that their data center (provided by company company CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN) is located in China, as that empowers most of the visitors to reduce the page load time. See the list of other web pages hosted by CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN.

21ic.com registered under .COM top-level domain. Check other websites in .COM zone.

The last verification results, performed on (August 28, 2018) 21ic.com show that 21ic.com has an invalid SSL certificate. Click “Refresh” button for SSL Information at the Safety Information section.

In accordance with Google Safe Browsing, Google Safe Search, Symantec and Web of Trust 21ic.com is pretty a safe domain.

Relying Google MobileFriendly test 21ic.com is well optimized for mobile and tablet devices, however web page loading speed may be improved.


Global Rank
10,532
Average Load Time
1.11sec
Links In Count
676
Website Value
$1.1 M

Overview
Last Updated: 03/28/2024
Overall result - 21ic.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: 03/21/2024
21ic.com is safe.
Norton ConnectSafe evaluates 21ic.com for any unsafe and insecure content. The results are critical for families with young children.
Google Safe Search
Last Updated: 02/07/2019
21ic.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
21ic.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.
Site Advisor
Last Updated: 02/22/2021
21ic.com is safe.
McAfee assesses 21ic.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 21ic.com for mature or inappropriate content, only security checks are evaluated.
Web of Trust
Last Updated: 01/09/2019
21ic.com child safety is very good.
The WOT calculates reputation of the 21ic.com. This reputation system receives ratings from users and information from third-party sources, assesses the 21ic.com for safety features and confirms, whether 21ic.com is suitable for children.

SSL Information
WARNING!Certificate download error. Previous scan results are shown below.
Domainm.21ic.com
Issuer OrganizationUnknown
IssuerEncryption Everywhere DV TLS CA - G1
AlgorithmRSA-SHA256
Valid form04/23/2018
Expiration04/23/2019
SignedCertificate is not self signed
Additional Domains m.21ic.com
Server Location

ASN Information

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

Last Update: 10/02/2023

% [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)

WHOIS

Domain Name: 21IC.COM
Registry Domain ID: 17040411_DOMAIN_COM-VRSN
Registrar WHOIS Server: grs-whois.hichina.com
Registrar URL: http://www.net.cn
Updated Date: 2018-07-30T07:41:06Z
Creation Date: 2000-01-10T02:41:29Z
Registry Expiry Date: 2022-01-10T02:41:29Z
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: ok https://icann.org/epp#ok
Name Server: DNS1.HICHINA.COM
Name Server: DNS2.HICHINA.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2021-04-25T07:28:49Z


DNS Records
HostA RecordTTL
21ic.com39.107.224.1263600
HostMX RecordPriorityTTL
21ic.commx3.qiye.aliyun.com15600
21ic.commx2.qiye.aliyun.com10600
21ic.commx1.qiye.aliyun.com5600
HostNS RecordTTL
21ic.comdns2.hichina.com86400
21ic.comdns1.hichina.com86400
HostTXT RecordTTL
21ic.comv=spf1 include:spf.qiye.aliyun.com -all600

dns1.hichina.com
TTL: 600
Email address: hostmaster.hichina.com
Serial: 1
Refresh: 3600
Retry: 1200
Expire: 3600
Minimum: 600


Errors
Warnings

Last tested: 02/01/2018

Desktop
Desktop Speed
42%

Desktop Resource Breakdown
Total Resources164
Number of Hosts15
Static Resources125
JavaScript Resources26
CSS Resources4

Last tested: 05/30/2017

Mobile
Mobile Usability
83%
Mobile Speed
53%

Mobile Resource Breakdown
Total Resources43
Number of Hosts13
Static Resources23
JavaScript Resources19
CSS Resources1
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