Who called from 2345425115

Same as above...hung up.  No message.

It's the American Red Cross. If you've donated blood, and given that number, they're calling asking you to donate again.

confirmed it's the red cross. definitely worth answering and trying to donate blood.

If this is the Red Cross, maybe instead of calling me 19 times in the past 8 weeks and then hanging up when my voicemail answered, they could have left a message one of those times (because I just blocked them).