Is this considered harassment ?

I received 12 calls back to back, a voicemail and a text message at 2:30 am from my daughters father because he thought I had someone call him from a blocked number. His text said "Keep someone call me with a private number and we gonna have a problem real talk ". Now I had absolutely nothing to do with anyone calling him and I don t know what he s talking about. He told me before that he wanted to keep his distance from me to keep from hurting himself or me. I haven t messaged him or contacted him in any way since June, but at this point I feel like he has become threatening and harrassing and wonder if there s anything I can do to ensure the safety of our child and myself.