docs: def find(self, ip):
          '''
          Find the abuse contact for a IP address
  
          :param ip: IPv4 or IPv6 address to check
          :type ip: string
  
          :returns: emails associated with IP
          :rtype: list
          :returns: none if no contact could be found
          :rtype: None
  
          :raises: :py:class:`ValueError`: if ip is not properly formatted
          '''
          ip = ipaddr.IPAddress(ip)
          rev = reversename(ip.exploded)
          revip, _ = rev.split(3)
          lookup = revip.concatenate(self.provider).to_text()
  
          contacts = self._get_txt_record(lookup)
          if contacts:
              return contacts.split(',')