We do not provide IP addresses from the end user interface (GUI) for Signals Notebook. These are passed through a load balancer and are not constrained to useful ranges.
We can provide IP ranges for our back end services if needed. This would commonly be used if you use the External Data Sources, External Chemical Sources, External Lists or External Notifications features and wished to restrict incoming (to you) calls from these services by IIP Address. These addresses are environment specific and available on demand.