What IP addresses and User agents are used by Siteimprove?
By Sean Needham
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
- Siteimprove Performance IP Addresses
- Siteimprove Response IP Addresses
- Report and email IP addresses
- Service Hosting IP address
- HTML/CSS validation
- Text file of IP addresses
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:
184.108.40.206* (Global - commonly used)
220.127.116.11* (Global - commonly used)
18.104.22.168 (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.
22.214.171.124 (USA Midwest + Northeast)
126.96.36.199 (USA South)
188.8.131.52 (USA West)
184.108.40.206 (Western Europe)
220.127.116.11 (Great Britain and Ireland)
18.104.22.168 (South America)
22.214.171.124 (Northern Europe)
126.96.36.199 (Hong Kong)
Siteimprove Response IP Addresses
These IP addresses are used for uptime monitoring by the Siteimprove Response Service.
188.8.131.52 (Sydney, Australia)
184.108.40.206 (Sydney, Australia)
220.127.116.11 (Sâo Paulo, Brazil)
18.104.22.168 (Frankfurt, Germany)
22.214.171.124 (Frankfurt, Germany)
126.96.36.199 (Mumbai, India)
188.8.131.52 (South Korea)
184.108.40.206 (South Korea)
220.127.116.11 (Tokyo, Japan)
18.104.22.168 (Virginia, USA)
22.214.171.124 (Virginia, USA)
126.96.36.199 (Oregon, USA)
188.8.131.52 (Oregon, USA)
184.108.40.206 (Northern California)
220.127.116.11 (Northern California)
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.
18.104.22.168 - Receiving emails
22.214.171.124 - Receiving emails
126.96.36.199 - Viewing Dashboard reports linked from email (report.siteimprove.com)
188.8.131.52 - 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.
184.108.40.206 - Receiving Response emails
220.127.116.11 - Receiving Response emails
Service Hosting IP address
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.
The following domains should not be blocked when using the services provided by Siteimprove:
HTML/CSS validation checks are performed from the IP:18.104.22.168
Text file of IP addresses
- Siteimprove_IP_addresses_q3v2_2020.txt (833 Bytes)