There are the following Steps to check Active Member :
1. Login Employer ESI Portal
link- http://esic.gov.in
2. Service-Employer- Employer Portal
3. New Page will be Open like below :
4. Enter Id and Password of Employer and after Login New Page will be Open like below :
5. Click on "List of Employees" Option in Employee side list.
6. New Page will be Open Like Below :
7. Hare You can show all Active Member List with his/her ESI Number.