def callsign_to_region(callsign):
    """
    Convert callsign to where the station is located
    """
    return {
        '4U1UN': 'United Nations',
        'VE8AT': 'Canada',
        'W6WX': 'United States',
        'KH6WO': 'Hawaii',
        'KH6RS': 'Hawaii',
        'ZL6B': 'New Zealand',
        'VK6RBP': 'Australia',
        'JA2IGY': 'Japan',
        'RR9O': 'Russia',
        'VR2B': 'Hong Kong',
        '4S7B': 'Sri Lanka',
        'ZS6DN': 'South Africa',
        '5Z4B': 'Kenya',
        '4X6TU': 'Israel',
        'OH2B': 'Finland',
        'CS3B': 'Madeira',
        'LU4AA': 'Argentina',
        'OA4B': 'Peru',
        'YV5B': 'Venezuela'
    }[callsign]