The OpenCage Geocoder returns three digit UN M49 codes in the UNM_49 annotation. These codes map to different regions of the world
Possible regions and their corresponding codes are:
'AFRICA' : '002'
'AMERICAS' : '019'
'ASIA' : '142'
'AUSTRALASIA' : '053'
'CARIBBEAN' : '029'
'CENTRAL_AMERICA' : '013'
'CENTRAL_ASIA' : '143'
'CHANNEL_ISLANDS' : '830'
'EASTERN_AFRICA' : '014'
'EASTERN_ASIA' : '030'
'EASTERN_EUROPE' : '151'
'EUROPE' : '150'
'LATIN_AMERICA' : '419'
'MELANESIA' : '054'
'MICRONESIAN_REGION' : '057'
'MIDDLE_AFRICA' : '017'
'NORTHERN_AFRICA' : '015'
'NORTHERN_AMERICA' : '021'
'NORTHERN_EUROPE' : '154'
'NORTH_AMERICA' : '003'
'OCEANIA' : '009'
'POLYNESIA' : '061'
'SOUTHEAST_ASIA' : '035'
'SOUTHERN_AFRICA' : '018'
'SOUTHERN_ASIA' : '034'
'SOUTHERN_EUROPE' : '039'
'SOUTH_AMERICA' : '005'
'SUB-SAHARAN_AFRICA' : '202'
'WESTERN_AFRICA' : '011'
'WESTERN_ASIA' : '145'
'WESTERN_EUROPE' : '155'
'WORLD' : '001'