400.cn - SEO Checker - Website Review

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Web Frameworks

19 400.cn Last Updated: 2 years

Success 62% of passed verification steps

Warning 15% of total warning

Errors 23% of total errors, require fast action

Mobile

Performance Desktop Score 80%

Best Practices Desktop Score 69%

SEO Desktop Score 80%

Progressive Web App Desktop Score 50%

Performance Mobile Score 50%

Best Practices Mobile Score 62%

SEO Mobile Score 89%

Progressive Web App Mobile Score 52%

Page Authority Authority 41%

Domain Authority Domain Authority 1%

Moz Rank 4.1/10

Bounce Rate Rate 0%

Charset Encoding

Great, language/character encoding is specified: UTF-8

Title Tag 30 Characters

易号网_400电话申请_400电话办理_WWW.400.CN

Meta Description 88 Characters

400电话首选易号网（www.400.cn），目前国内大的企业400电话申请办理中心，正规渠道专业受理，确保400电话服务完善，开通快速。全国受理热线：400-900-7888

Effective URL 18 Characters

https://www.400.cn

Excerpt Page content

易号网_400电话申请_400电话办理_www.400.cn 用户登陆 400选号 4001 ...

Meta Keywords 4 Detected

400电话 400电话申请 400电话办理易号网

Keywords Cloud Density

5折抢购30 千元功能礼包30 今日办理即送30 300元8 送全套基础功能5 可绑定中继号4 呼叫中心等引示号4 中国400电话网3 常见问题3 联系我们2

Keyword Consistency Keyword density is one of the main terms in SEO

Keyword	Freq	Title	Desc	Domain	H1	H2
5折抢购	30
千元功能礼包	30
今日办理即送	30
300元	8
送全套基础功能	5
可绑定中继号	4
呼叫中心等引示号	4
中国400电话网	3
常见问题	3
联系我们	2

Google Preview Your look like this in google search result

易号网_400电话申请_400电话办理_WWW.400.CN

https://www.400.cn

Robots.txt File Detected

http://400.cn/robots.txt

Sitemap.xml File Detected

http://400.cn/sitemap.xml

Whois Is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system

Updated: 1970-01-01 / 51 years

Create on: 1970-01-01 / 51 years

Expires on: 1970-01-01 / 626 months 17 days

Nameservers

ns4.dns.com

ns3.dns.com

Page Size Code & Text Ratio

Document Size: ~81.91 KB

Code Size: ~32.43 KB

Text Size: ~49.47 KB Ratio: 60.40%

Estimation Traffic and Earnings

Only Registered Users

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Technologies

PWA - Manifest

Manifest is not valid

Your site don't have valid manifest.json, read more in Web App Manifest

Desktop

Reduce server response times (TTFB) Root document took 1,830 ms

Time To First Byte identifies the time at which your server sends a response

Eliminate render-blocking resources Potential savings of 140 ms

Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles

Efficiently encode images Potential savings of 137 KB

Optimized images load faster and consume less cellular data

Enable text compression Potential savings of 191 KB

Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes

Minimize third-party usage Third-party code blocked the main thread for 0 ms

Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading

Total Blocking Time 10 ms

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.

JavaScript execution time 0.3 s

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this

Defer offscreen images Potential savings of 10 KB

Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive

Server Backend Latencies 0 ms

Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance

Properly size images Potential savings of 5 KB

Serve images that are appropriately-sized to save cellular data and improve load time

Speed Index 3.1 s

Speed Index shows how quickly the contents of a page are visibly populated

First CPU Idle 0.8 s

First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).

Avoids enormous network payloads Total size was 717 KB

Large network payloads cost users real money and are highly correlated with long load times

Minimizes main-thread work 1.1 s

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this

First Contentful Paint 0.5 s

First Contentful Paint marks the time at which the first text or image is painted

Includes front-end JavaScript libraries with known security vulnerabilities 3 vulnerabilities detected

Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers

Avoid chaining critical requests 11 chains found

The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load

Avoid an excessive DOM size 986 elements

A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)

Minify JavaScript Potential savings of 24 KB

Minifying JavaScript files can reduce payload sizes and script parse time

First Meaningful Paint 0.7 s

First Meaningful Paint measures when the primary content of a page is visible

Keep request counts low and transfer sizes small 39 requests • 717 KB

To set budgets for the quantity and size of page resources, add a budget.json file

Serve static assets with an efficient cache policy 29 resources found

A long cache lifetime can speed up repeat visits to your page

Max Potential First Input Delay 120 ms

The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task

Time to Interactive 0.8 s

Time to interactive is the amount of time it takes for the page to become fully interactive

Network Round Trip Times 0 ms

Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance

Estimated Input Latency 10 ms

Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy

Minify CSS Potential savings of 4 KB

Minifying CSS files can reduce network payload sizes

Remove unused CSS Potential savings of 28 KB

Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity

Serve images in next-gen formats Potential savings of 222 KB

Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption

Mobile

Serve images in next-gen formats Potential savings of 159 KB

Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption

Does not use HTTPS 1 insecure request found

All sites should be protected with HTTPS, even ones that don't handle sensitive data. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs

Server response times are low (TTFB) Root document took 240 ms

Time To First Byte identifies the time at which your server sends a response

Eliminate render-blocking resources Potential savings of 780 ms

Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles

Enable text compression Potential savings of 113 KB

Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes

Minimize third-party usage Third-party code blocked the main thread for 80 ms

Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading

Total Blocking Time 170 ms

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.

JavaScript execution time 0.8 s

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this

Server Backend Latencies 0 ms

Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance

Defer offscreen images Potential savings of 16 KB

Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive

Speed Index 9.0 s

Speed Index shows how quickly the contents of a page are visibly populated

First CPU Idle 5.2 s

First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).

Avoids enormous network payloads Total size was 761 KB

Large network payloads cost users real money and are highly correlated with long load times

Minimize main-thread work 2.6 s

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this

First Contentful Paint 4.1 s

First Contentful Paint marks the time at which the first text or image is painted

Includes front-end JavaScript libraries with known security vulnerabilities 2 vulnerabilities detected

Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers

Avoid chaining critical requests 15 chains found

Avoids an excessive DOM size 555 elements

Preload key requests Potential savings of 1,680 ms

Consider using `<link rel=preload>` to prioritize fetching resources that are currently requested later in page load

Minify JavaScript Potential savings of 5 KB

Minifying JavaScript files can reduce payload sizes and script parse time

First Meaningful Paint 4.1 s

First Meaningful Paint measures when the primary content of a page is visible

Keep request counts low and transfer sizes small 40 requests • 761 KB

To set budgets for the quantity and size of page resources, add a budget.json file

Serve static assets with an efficient cache policy 31 resources found

A long cache lifetime can speed up repeat visits to your page

Max Potential First Input Delay 240 ms

The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task

Time to Interactive 5.4 s

Time to interactive is the amount of time it takes for the page to become fully interactive

Network Round Trip Times 0 ms

Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance

Estimated Input Latency 20 ms

First Contentful Paint (3G) 8580 ms

First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network

Minify CSS Potential savings of 5 KB

Minifying CSS files can reduce network payload sizes

Tap targets are not sized appropriately 90% appropriately sized tap targets

Interactive elements like buttons and links should be large enough (48x48px), and have enough space around them, to be easy enough to tap without overlapping onto other elements

Document uses legible font sizes 100% legible text

Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px

Remove unused CSS Potential savings of 12 KB

Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity

Speed And Optimization Tips

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Alexa Rank

0

Local Rank: / Users: / PageViews:

Global Rank

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server

HTTP/1.1 200 OK
Cache-Control: private
Content-Length: 77375
Content-Type: text/html; Charset=utf-8
Server: Microsoft-IIS/8.5
Set-Cookie: ASPSESSIONIDCWCCQBSS=EHFEEBEDLPDIAOALNAMJFNAL; secure; path=/
X-Powered-By: ASP.NET
Date: Thu, 28 Nov 2019 07:30:11 GMT

DNS Records DNS Resource Records associated with a hostname

View DNS Records

Type	Name	Value	Class	TTL
A	400.cn	106.14.29.229	IN	3513
NS	400.cn	ns4.dns.com	IN	7198
NS	400.cn	ns3.dns.com	IN	7198
MX	400.cn	mxdomain.qq.com	IN	3598
TXT	400.cn	v=spf1 include:spf.mail.qq.com ~all	IN	3598

Your Website Score is

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19 400.cn Last Updated: 2 years

Desktop

Mobile

Estimation Traffic and Earnings

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Technologies

IIS

Microsoft ASP NET

Windows Server

PWA - Manifest

Desktop

Mobile

Speed And Optimization Tips

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Alexa Rank

0

Information Server

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