right after i bought a new domain name from 1&1 internet a few months ago, i started getting flooded with these same types of spam calls from different various (and apparently spoofed) phone numbers. every time i block one number, another new number calls me with the same seo bs offers. i am also being flooded with similar emails. before using 1&1 internet to regiser my new domain name, i got neither robocalls or email spams. i blame 1&1....
I don't recognize this number that calls 2 or 3 times a day so I don't answer; the caller never leaves a message just keeps the line open until the machine asks, "are you still there?" And, the caller number [404-891-5623] shows in duplicate on my ID caller screen.