We thought we had all of the Illinois area codes blocked - but I guessed wrong.
But I'm not wrong now!
They are ALL blocked!!!
Received the call and answered just to eff with them - something about Primex telecom????  "CLICK!"
Whatever - they are blocked forever - just added the 874 area code to our D**it**e call blocker.
Please purchase a call blocking phone or a blocking device that can block ENTIRE AREA CODES.
The work and they are inexpensive.
We have at least 150 area codes blocked - and room for more!
When you block an entire area code potentially, you block 6,000,000 - 8,000,000 phone numbers.