How do i block all calls from an 877 area code on my iphone 11?

The best way I found to do this after extensive searching was an iPhone app called Number Shield. You can block all numbers starting with any sequence, such as an area code. There's a 50 million limit to the total amount of phone numbers you can block, which means you can block 5 area codes. The app works really well. I choose to have a phone number with an area code for a different state from where I live. Spammers usually spoof a number with your area code, or a nearby area code, so that way I can block all the area codes the spammers try to use and still get all the calls I want. The blocked calls go straight to voice mail, so I don't miss anything important. I hardly get any spam calls now.

Hello caglaws,

We'd love to assist you with blocking calls. You can block phone numbers on your iPhone using the steps here: Block phone numbers, contacts, and emails on your iPhone, iPad, or iPod touch.

You can also silence unknown callers using the steps here: Detect and block spam phone calls. This will allow you to turn on Silence Unknown Callers to avoid getting calls from people you don’t know.

Best regards

877 is not a Russian area code, Russia has its own country code. 877, 866, 800 etc are non-geographically assigned toll free codes.

You can also allow Number Shield to allow contacts, so if someone in your contact has a blocked area code the call with still go through normally.