I saw something interesting the other day. This company called me twice within a few minutes. The first call came from "+1 844-###-####", but it was automatical

I saw something interesting the other day. This company called me twice within a few minutes. The first call came from "+1 844-###-####", but it was automatically blocked as spam by Android. The second call was from the same number, but it was formatted as "+844#######". That one wasn't blocked. I wonder if formatting the number this way allows them to circumvent spam lists, but doesn't trip anti-caller ID spoofing mechanisms?