Yes, Trackdesk can work across subdomains, but it requires additional setup if you want tracking to persist between them.
How does tracking work by default?
By default, the tracking cookie is saved only on the domain where the click script runs.
This means:
A click on
abc.mydomain.comwill store the cookie only for that subdomainIt will not be accessible on other subdomains (e.g.
checkout.mydomain.com) or the root domain
As a result, conversions tracked on a different subdomain may not be attributed correctly.
How to enable tracking across subdomains
To track users across multiple subdomains, the tracking cookie needs to be stored on the parent domain.
This allows the cookie to be shared across:
All subdomains
The main domain
👉 For step-by-step instructions, see article Saving Cookie on Parent Domain.
💡 Example
User lands on:
promo.yourwebsite.comConversion happens on:
checkout.yourwebsite.com
Without additional setup → conversion may not be tracked
With parent domain cookie → conversion is tracked correctly
Summary
By default, tracking works only within a single domain
Cross-subdomain tracking requires additional configuration
Storing the cookie on the parent domain ensures consistent tracking across your site