Tools & Wizards About Us

Report Summary

  • 49

    Performance

    Renders faster than
    67% of other websites

  • 60

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

400num.com

400电话|400号码|400电话办理|400电话申请|400电话开通|傲天400电话办理中心|全球800免费电话-全国400电话业务400num.com

Page Load Speed

16.9 sec in total

First Response

1.2 sec

Resources Loaded

14.9 sec

Page Rendered

773 ms

About Website

Click here to check amazing 400 Num content. Otherwise, check out these important facts you probably never knew about 400num.com

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Visit 400num.com

Key Findings

We analyzed 400num.com page load time and found that the first response time was 1.2 sec and then it took 15.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

400num.com performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

89/100

10%

LCP (Largest Contentful Paint)

Value7.6 s

4/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value640 ms

46/100

30%

CLS (Cumulative Layout Shift)

Value0.032

100/100

15%

TTI (Time to Interactive)

Value5.4 s

72/100

10%

Network Requests Diagram

www.400num.com

1235 ms

style.css

258 ms

logo.jpg

1009 ms

free-number.jpg

1012 ms

pa

706 ms

Our browser made a total of 69 requests to load all elements on the main page. We found that 87% of them (60 requests) were addressed to the original 400num.com, 6% (4 requests) were made to Wpa.qq.com and 6% (4 requests) were made to Pub.idqqimg.com. The less responsive or slowest element that took the longest time to load (9.6 sec) relates to the external source Count26.51yes.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 67.8 kB (9%)

Content Size

745.6 kB

After Optimization

677.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 400num.com main page is 745.6 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 30% of websites need less resources to load. Images take 678.4 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 39.6 kB

  • Original 46.7 kB
  • After minification 41.4 kB
  • After compression 7.1 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 5.4 kB, which is 11% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 39.6 kB or 85% of the original size.

Image Optimization

-2%

Potential reduce by 11.8 kB

  • Original 678.4 kB
  • After minification 666.6 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. 400 Num images are well optimized though.

JavaScript Optimization

-79%

Potential reduce by 8.3 kB

  • Original 10.5 kB
  • After minification 8.3 kB
  • After compression 2.2 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 8.3 kB or 79% of the original size.

CSS Optimization

-81%

Potential reduce by 8.2 kB

  • Original 10.0 kB
  • After minification 8.5 kB
  • After compression 1.9 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. 400num.com needs all CSS files to be minified and compressed as it can save up to 8.2 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (14%)

Requests Now

63

After Optimization

54

  • Images
  • JavaScript
  • CSS

The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 400 Num. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

400num.com accessibility score

60

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

400num.com best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

400num.com SEO score

67

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 400num.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that 400num.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of 400 Num. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: