what is the IMSI for these SIMs??

Device i’m using is asking for an IMSI, why is this info not readily available in my profile instead of having to create a new login for support?

Each SIM has a different IMSI. Most modems will show it to you in their own interface. If you have terminal access, the common AT command for that is AT+CIMI
The dashboard doesn’t show it at the moment, but it is available via API calls if needed.
GET /devices/<deviceid> (deviceid is shown on the dashboard)
If you need someone to look it up for you, please email support@hologram.io.