If you receive a lot of spam calls from your own specific area code and prefix, you have the ability to block that in the Hiya app. There is a way to block spoofed calls in the iPhone app. In the Hiya app, tap on options, then scroll down to the Spoofed Calls / Neighbor Scam option and choose block. You can also choose to alert instead of block.
The iPhone currently doesn't give us the ability to block an area code or prefix that is not part of your number. The moment we can, we will add that feature.
The block option for spoofed calls will block all calls with your area code and your prefix. Those in your contact list will be fine if you are sharing your contacts with Hiya and are on the most up to date version of the Hiya app.