The status of my parcel reads "NULL"? My tracking # is RB841212528CN

I would like to know if someone could help me figure out where my package's destination is? It's being delivered to the U.S but I would like a better idea of where it is, if possible because I it almost 20 days ago.
I am aware it might take longer being shipped from China but it would be great if I could be told a destination.
Tracking # RB841212528CN