A custom domain is connected to one HeySummit event at a time. You cannot use the same custom domain, such as summit.example.com, for multiple active events at the same time.

Each event always has its own HeySummit subdomain, and each event can have its own custom domain if custom domains are available on your plan.

HeySummit uses the custom domain on the event record to decide which event should load when someone visits that address. If the same custom domain is already assigned to another event, HeySummit will block it and ask you to choose a different domain or remove it from the other event first.

For example, summit.example.com can point to one event. A different event would need a different subdomain, such as summit2026.example.com, live.example.com, or replays.example.com.

If an event has finished and you want a new event to use the same custom domain, first remove the custom domain from the old event.

Then open the dashboard for the new event, go to Event Setup > Settings, open Event Domain, choose Custom Domain, and enter the custom domain you want to reuse.

If the domain is not already registered for that event, you may need to register it and complete the DNS verification steps shown in the Event Domain panel. HeySummit will email you once the custom domain has been activated.

Remember that any old links using that custom domain will now send people to the new event after the switch. If attendees, speakers, or partners still need access to the old event, share the old event's HeySummit subdomain with them before you reuse the custom domain.

If you want one event to stay open long term instead of creating a new event each time, consider using an evergreen event setup. That can be a better fit for ongoing webinar series, content libraries, or events that should remain open for registration over time.