This spoofed invalid number calls almost every day, despite being blocked. It is an invalid number because number prefixes cannot end with "11", like 911, 711, etc, so it is almost certainly a scammer making these calls.
Some days the phone rings so many times and all are telemarketers. I rarely make the mistake of answering and once a week I report them all as unwanted phone calls. If so many people report this how do they manage to stay in business.