Hubspot API IP Address Range

I’m currently working behind a corporate proxy. We are trying to add a firewall rule request that will allow us to bypass the corporate proxy and make direct request to the Hubspot API. To do so we require the IP address and subnet mask for the destination (Hubspot API) that will be receiving the connection / session (destination) as well as the protocol (TCP / UDP) and port number that will be used for the connection / session.
I am wondering if the Hubspot API has a dedicated IP range?

@T_M

There is no guarantee that the IP range will stay the same. You should consider the IP addresses to be dynamic.