The problem with blocking numbers in bulk is that phone numbers are recycled all the time.
If you block 500 numbers and then you apply for a job and the person who wants to call you back about the job just got a new prepaid phone, you might be blocking their number.
If you block 500 numbers and then you apply for a job and the person who wants to call you back about the job just got a new prepaid phone, you might be blocking their number.