curl --request GET \
  --url https://api.brightdata.com/countrieslist \
  --header 'Authorization: Bearer <token>'

{
  "zone_types": {
    "DC_shared": {
      "country_codes": [
        "<string>"
      ]
    },
    "DC_dedicated_ip": {
      "country_codes": [
        "<string>"
      ]
    },
    "DC_dedicated_host": {
      "country_codes": [
        "<string>"
      ]
    },
    "ISP_shared": {
      "country_codes": [
        "<string>"
      ]
    },
    "ISP_dedicated_ip": {
      "country_codes": [
        "<string>"
      ]
    },
    "ISP_dedicated_host": {
      "country_codes": [
        "<string>"
      ]
    }
  }
}