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 IP Addresses
- Content Suite user agents
- Siteimprove Analytics 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 crawler IP addresses and user-agents
Note: This list includes IP addresses and user agents used for the Siteimprove content suite (i.e. Quality Assurance, Accessibility, Policy, and SEO). Crawls run on ports are 80 for HTTP and 443 for HTTPS.
Content suite IP addresses
These following IP addresses are used to crawl and check your website:
188.8.131.52* (Global - commonly used)
184.108.40.206* (Global - commonly used)
*These IP addresses are Siteimprove's most commonly used outgoing crawler IP addresses.
Content suite user agents
User agents can contain full user agent strings and user agent tokens.
|Full user agent strings||User agent tokens|
|A full user agent string is a full description of the crawler and appears in the request and your website logs. (Note: version changes may occur)||A user agent token is used in the "user agent:" line in robots.txt to match a crawler type when writing crawl rules for your site.|
|Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; Trident/6.0) SiteCheck-sitecrawl by Siteimprove.com||SiteimproveBot-Crawler|
|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 Analytics IP addresses
This IP address is used by the Behavior Map Service in Siteimprove Analytics. In many cases, you will not see this in your website logs as it is often behind one of the crawler IP proxies listed above.
220.127.116.11 (Global - Behavior Map Service)
Siteimprove Performance IP addresses
These IP addresses are used for performance monitoring by the Siteimprove Performance product.
18.104.22.168 (USA Midwest + Northeast)
22.214.171.124 (USA South)
126.96.36.199 (USA West)
188.8.131.52 (Western Europe)
184.108.40.206 (Great Britain and Ireland)
220.127.116.11 (South America)
18.104.22.168 (Northern Europe)
22.214.171.124 (Hong Kong)
Siteimprove Response IP addresses
These IP addresses are used for uptime monitoring by the Siteimprove Response Service.
126.96.36.199 (Sydney, Australia)
188.8.131.52 (Sydney, Australia)
184.108.40.206 (Sâo Paulo, Brazil)
220.127.116.11 (Frankfurt, Germany)
18.104.22.168 (Frankfurt, Germany)
22.214.171.124 (Mumbai, India)
126.96.36.199 (South Korea)
188.8.131.52 (South Korea)
184.108.40.206 (Tokyo, Japan)
220.127.116.11 (Virginia, USA)
18.104.22.168 (Virginia, USA)
22.214.171.124 (Oregon, USA)
126.96.36.199 (Oregon, USA)
188.8.131.52 (Northern California)
184.108.40.206 (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.
220.127.116.11 - Receiving emails
18.104.22.168 - Receiving emails
22.214.171.124 - Viewing Dashboard reports linked from email (report.siteimprove.com)
126.96.36.199 - 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.
188.8.131.52 - Receiving Response emails
184.108.40.206 - 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:220.127.116.11
Text file of IP addresses
- Siteimprove_IP_addresses_q1v1_2021.txt (831 Bytes)