How Do I Find an Inmate ID Number After a Recent Transfer?

Ok so .. My bf was just transferred 2 days ago to Bledsoe county correctional complex in TN . I called the facility to make sure I had the correct address and was told he probably won't get my letter without his prison ID number..I can't put money on the phone acct or his commissary until Friday and he has tried to call me 3 times already and I don't want him thinking I don't want to talk to him or write to him. We talked 2 times a day and I write at least 3 times a week. Is there any way to get his prison ID number asap? And one more question.do you know if I Can send 3 of my own 4x6 pics to this prison? Thank you so much for your time.