21tb.com Website Review

21tb.com - Basic Information

Domain Age:
15 years 10 months
Archive.org First Cached:
robots.txt:
Unavailable
XML Sitemap:
Unavailable
Alexa Traffic Rank:
Server:
nginx
Country/Region:

21tb.com - Pages Indexed

Baidu:
Bing:
Google:
Yandex:

21tb.com - Site Security

McAfee SiteAdvisor:
Norton Safe Web:

21tb.com - Social (SNS)

Delicious:
Unknown
Stumbleupon:
0
Facebook Likes:
0
Twitter Tweets:
Unknown
Google Plus Likes:
0

21tb.com - Page Information

Title:
时代光华官网-在线学习平台|网络学习平台|elearning平台
Length: 32 character(s); Best length: 10 ~ 60 character(s)
Meta keywords:
在线学习平台,在线学习系统,在线培训平台,e-learning,elearning平台,网络学习平台,云端学习,企业培训课程,在线学习系统,时代光华
Length: 74 character(s)
Meta description:
时代光华是基于网络在线的组织学习方案服务商,以elearning网络学习服务为主业,业务涵盖内容、平台、课件软件定制、移动学习、公开课、内训等。
Length: 72 character(s); Best length: 50 ~ 160 character(s)
H1:
请选择
Length: 3 character(s)
Internal links:
17 (0 nofollow)
External links:
14 (1 nofollow)

21tb.com - Traffic Rank

Alexa Traffic Graphs:
Daily Global Rank Trend
(6 Months)
Daily Global Rank Trend
(2 Years)
Daily Pageview per User Daily Reach Search Visits
Daily Global Rank Trend (6 Months): 21tb.com Daily Global Rank Trend (2 Years): 21tb.com Daily Pageview per User: 21tb.com Daily Reach (per million): 21tb.com Search Visits (percent): 21tb.com
Daily Global Rank Trend (6 Months): 21tb.com
Compete Traffic Graphs: Unique Vistors:
Compete Traffic Graphs: Unique Vistors: 21tb.com

21tb.com - Site Technology

Server:
nginx
SSL Secure:
Unavailable
robots.txt:
Unavailable
XML Sitemap:
Unavailable
Gzip Compress:
Available
Favicon.ico:
Unavailable

21tb.com - HTTP Header Analysis

HTTP header fields are components of the message header of requests and responses in the Hypertext Transfer Protocol (HTTP). They define the operating parameters of an HTTP transaction. The header fields are not directly displayed by normal web browsers like Internet Explorer, Google Chrome, Firefox etc. Below is the HTTP Header information of 21tb.com:
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Thu, 22 Feb 2018 05:31:45 GMT
Content-Type: text/html
Content-Length: 178
Connection: keep-alive
Keep-Alive: timeout=15
Location: http://www.21tb.com/

HTTP/1.1 200 OK
Server: nginx
Date: Thu, 22 Feb 2018 05:31:59 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
FAI-W-FLOW: 1348398046
Set-Cookie: _cliid=uGCvrlgrK5bKiiVy; max-age=31536000; Path=/; Domain=.www.21tb.com; HttpOnly;
P3P: CP=CAO PSA OUR
Vary: Accept-Encoding
Content-Encoding: gzip
Set-Cookie: isXFme=true; domain=www.21tb.com; path=/; expires=Thu, 22-Feb-2018 11:31:59 GMT
Set-Cookie: _lastEnterDay=2018-02-22; domain=www.21tb.com; path=/; expires=Sat, 24-Feb-2018 05:31:59 GMT
Set-Cookie: _loginBeforeFiveMin=true; domain=www.21tb.com; path=/; expires=Thu, 22-Feb-2018 05:34:59 GMT

21tb.com - DNS Record Analysis

Domain Name Systes (DNS) translates easily memorized domain names to the numerical IP addresses needed for the purpose of locating computer services and devices worldwide. There are total 6 DNS record(s) of 21tb.com.
Host Type IP/Target TTL Extra Infomation
21tb.comA3600
21tb.comMX3600pri: 10
21tb.comMX3600pri: 20
21tb.comNS3600
21tb.comSOA3600expire: 1209600
serial: 2015011899
21tb.comTXT
v=spf1 ip4:120.132.46.36 ip4:120.132.46.37 -all
3600