You can target a specific city within a country by adding a city name to the username, like username-country-country_code-city-city_code. The city_codemust be in lowercase only and have no spaces, for example -city-sanfrancisco

Shell
curl "http://target.site" \
    --proxy brd.superproxy.io:22225 \
    --proxy-user brd-customer-<CUSTOMER_ID>-zone-<ZONE_NAME>-country-us-city-sanfrancisco:<ZONE_PASSWORD>