Number Block

Query the area code at NANPA: https://www.nationalnanpa.com/enas/npa_query.do Also, lookup numbers dirrectly: https://www.twilio.com/lookup

North American Numbering Plan Administration https://www.nationalnanpa.com/area_codes/index.html

Go to your recent caller list. Find the number you want to block and click the 'i' symbol. Scroll all the way to the bottom and click on: Block this Caller