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What IP addresses and User agents are used by Siteimprove?

Sean Needham avatar


In order to provide additional information for our Siteimprove customers, this page has been created as a reference for IP addresses that are used by Siteimprove to check/crawl your website.

You will also find information on how our crawlers identify themselves when crawling your website. They do this via the so-called user agent string, i.e. an information tag used by web-servers to identify the type of browser or crawler visiting the website.

Below you will find a list of the IP addresses as well as user-agent strings used for each of our services. You can also download a text file containing the IP addresses for use when creating an allow list in your firewall.

Content Suite and Crawler IP addresses

Note: This list includes IP addresses used for Quality Assurance, Accessibility, Policy, SEO and the Behavior Maps feature of Analytics. Crawls run on ports are 80 for HTTP and 443 for HTTPS.

These following IP addresses are used to crawl and check your website:

93.160.60.22* (Global - commonly used)

185.229.144.22* (Global - commonly used)

80.62.246.50 (Global)

52.48.230.149 (Global)

52.57.25.76 (Global)

3.10.81.130 (Global)

35.157.236.87 (Global)

35.157.42.7 (Global)

52.55.30.145 (Global)

52.20.183.91 (Global)

52.60.34.56 (Global)

185.229.144.10 (Global)

52.7.141.1 (USA)

52.4.143.42 (USA)

52.64.209.168 (Australia)

52.47.166.84 (France)

35.204.24.17 (Netherlands)

52.199.41.160 (Japan)

35.156.240.123 (Global - Behavior Map Service)

*These IP addresses are Siteimprove's most commonly used outgoing crawler IP addresses.

Content Suite user-agents

(Primary user-agents. Note: Version changes may occur)

Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0) SiteCheck-sitecrawl by Siteimprove.com

Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0) LinkCheck by Siteimprove.com

Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0) Image size by Siteimprove.com

CSS Validator: Jigsaw/2.3.0 W3C_CSS_Validator_JFouffa/2.0

Siteimprove Performance IP Addresses

These IP addresses are used for performance monitoring by the Siteimprove Performance product.

18.223.89.15 (USA Midwest + Northeast)

3.209.121.100 (USA South)

52.8.130.130 (USA West)

3.123.96.88 (Western Europe)

3.10.81.130 (Great Britain and Ireland)

52.63.157.211 (Australia)

3.113.133.88 (Japan)

18.230.72.87 (South America)

13.48.47.239 (Northern Europe)

35.182.100.126 (Canada)

18.162.92.10 (Hong Kong)

Siteimprove Response IP Addresses

These IP addresses are used for uptime monitoring by the Siteimprove Response Service.

52.62.119.24 (Sydney, Australia)

52.62.147.245 (Sydney, Australia)

54.233.93.223 (Sâo Paulo, Brazil)

52.29.157.54 (Frankfurt, Germany)

52.29.165.98 (Frankfurt, Germany)

35.154.71.109 (Mumbai, India)

52.78.201.227 (South Korea)

52.79.109.89 (South Korea)

52.49.22.75 (Ireland)

52.17.221.188 (Ireland)

52.192.200.212 (Tokyo, Japan)

52.77.4.220 (Singapore)

52.76.24.207 (Singapore)

52.71.233.116 (Virginia, USA)

52.70.218.116 (Virginia, USA)

52.89.228.115 (Oregon, USA)

52.33.171.213 (Oregon, USA)

52.8.142.166 (Northern California)

52.8.3.121 (Northern California)

Response user-agents

Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0) Response by Siteimprove.com

Report and email IP addresses

Note: Emails are sent from the domain @siteimprove.com

General email IPs

The following IP addresses are used to send out Siteimprove emails (e.g. welcome emails, forgot password emails, report emails, etc.) but not including the Response alert email IPs.

149.72.248.150 - Receiving emails

168.245.125.127 - Receiving emails

185.229.144.61 - Viewing Dashboard reports linked from email (report.siteimprove.com)

80.62.246.46 - Viewing reports module data linked from emails (reports.siteimprove.com)

Response alert email IPs

The following IP addresses are used to send out Siteimprove Response alert emails only.

52.29.157.54 - Receiving Response emails

52.29.165.98 - Receiving Response emails

Service Hosting IP address

185.229.144.61

This is the hosting IP address for the Siteimprove Service on the following domains:

  • my2.siteimprove.com - Siteimprove Platform 
  • id.siteimprove.com - Siteimprove login
  • sso2.siteimprove.com - Single Sign-On version 2

Note: Crawling is not carried out from this IP address however this IP address may be required, for example, in a restricted CMS environment when a customer wishes to use the Siteimprove CMS Plugin. 

Domains

The following domains should not be blocked when using the services provided by Siteimprove:

  • *.siteimprove.com
  • *.siteimproveanalytics.com
  • *.siteimprove.net
  • *.siteimproveanalytics.io

HTML/CSS validation

HTML/CSS validation checks are performed from the IP:52.58.124.116

Text file of IP addresses

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