(800) 999-9999 is Covenant House's NineLine for youth in crisis. They will not be calling you. A call from this number will be an impostor that has a system to override their caller id  making it look like this number. Just hang up or don't bother to answer.

I get calls from this # repeatedly, No message and if I answer no one is there.

Yes, companies use numbers like 800-999-9999 and 800-111-1111 to mask who they are so you won't know.

This is Covenant House a suicide hotline according to Google. I called it once and asked them why they were calling but they said it wasn't them. They said companies use this number to mask who they are.