{"area_code":"603","is_legitimate_code":true,"explanation":"Area code 603 is a legitimate New Hampshire area code. The code itself is not a scam, but scammers can spoof any number — including 603 — so individual calls can still be fraudulent.","spoofing_note":"An area code only shows where a number is registered, not who is calling. Caller ID can be spoofed, so the code alone is not proof a call is local, safe, or fraudulent.","ftc_complaints":{"numbers_with_complaints":89,"total_complaints":469,"top_subjects":["Other","Dropped call or no message","No Subject Provided"],"most_complained":[{"number":"(603) 633-5042","complaints":19,"url":"https://areacode.fyi/number/6036335042"},{"number":"(603) 570-4474","complaints":16,"url":"https://areacode.fyi/number/6035704474"},{"number":"(603) 207-4386","complaints":14,"url":"https://areacode.fyi/number/6032074386"},{"number":"(603) 202-3699","complaints":13,"url":"https://areacode.fyi/number/6032023699"},{"number":"(603) 704-3119","complaints":13,"url":"https://areacode.fyi/number/6037043119"}],"note":"These are FTC Do Not Call complaints filed about specific numbers shown with this area code — frequently spoofed. The area code itself is not a scam.","source":"FTC Do Not Call Reported Calls"},"advice":"Judge the call by what it asks for (urgency, gift cards/crypto, confirming codes or SSN), not by the area code. When unsure, hang up and call back on an official number.","canonical_url":"https://areacode.fyi/603/scam","source":"North American Numbering Plan Administrator via areacode.fyi","data_date":"2026-08-02"}