Tools & Wizards About Us
netnummer.site screenshot

Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

netnummer.site

Area codes the Netherlands, an overview of all area codes in the Netherlands

Page Load Speed

1.5 sec in total

First Response

183 ms

Resources Loaded

1.2 sec

Page Rendered

131 ms

netnummer.site screenshot

About Website

Visit netnummer.site now to see the best up-to-date Netnummer content and also check out these interesting facts you probably never knew about netnummer.site

Find an area code by place or a place by area code online, on netnummer.site, the website about area codes in the Netherlands

Visit netnummer.site

Key Findings

We analyzed Netnummer.site page load time and found that the first response time was 183 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

netnummer.site performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

72/100

10%

LCP (Largest Contentful Paint)

Value6.4 s

10/100

25%

SI (Speed Index)

Value6.8 s

35/100

10%

TBT (Total Blocking Time)

Value3,440 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.179

67/100

15%

TTI (Time to Interactive)

Value17.8 s

4/100

10%

Network Requests Diagram

netnummer.site

183 ms

netnummer.site

382 ms

css

40 ms

min.css

183 ms

adsbygoogle.js

71 ms

Our browser made a total of 16 requests to load all elements on the main page. We found that 44% of them (7 requests) were addressed to the original Netnummer.site, 13% (2 requests) were made to Google-analytics.com and 6% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (530 ms) belongs to the original domain Netnummer.site.

Page Optimization Overview & Recommendations

Page size can be reduced by 132.7 kB (23%)

Content Size

571.4 kB

After Optimization

438.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Netnummer.site main page is 571.4 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. 15% of websites need less resources to load. Javascripts take 366.8 kB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 4.9 kB

  • Original 7.2 kB
  • After minification 7.2 kB
  • After compression 2.3 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 4.9 kB or 68% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 167.7 kB
  • After minification 167.7 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. Netnummer images are well optimized though.

JavaScript Optimization

-35%

Potential reduce by 127.2 kB

  • Original 366.8 kB
  • After minification 366.8 kB
  • After compression 239.6 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 127.2 kB or 35% of the original size.

CSS Optimization

-2%

Potential reduce by 617 B

  • Original 29.6 kB
  • After minification 29.6 kB
  • After compression 29.0 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. Netnummer.site has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 5 (42%)

Requests Now

12

After Optimization

7

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 12 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Netnummer. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

netnummer.site

netnummer.site

183 ms

netnummer.site

netnummer.site

382 ms

css

css

40 ms

min.css

min.css

183 ms

adsbygoogle.js

adsbygoogle.js

71 ms

js

js

132 ms

jsapi

jsapi

32 ms

min.js

min.js

429 ms

netnummerkaart-nederland.jpg

netnummerkaart-nederland.jpg

530 ms

loader.js

loader.js

18 ms

telephone.jpg

telephone.jpg

177 ms

font

font

18 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

304 ms

analytics.js

analytics.js

17 ms

collect

collect

12 ms

js

js

61 ms

Accessibility Review

netnummer.site accessibility score

98

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

netnummer.site best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

netnummer.site SEO score

83

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

Document doesn't have a valid hreflang

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Netnummer.site can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Netnummer.site 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

netnummer.site

Open Graph description is not detected on the main page of Netnummer. 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: