MODE: Select ALL for no mode restriction (i.e. all modes), or each mode if needed. Here the mode is only estimated on frequency and remarks of that spot, therefore results may be incorrect sometimes. And if you specify a mode (i.e. not ALL), the spots of 2m and up are not included at all in the result.

CALLSIGN: Input full callsign or some part of it for partial matching. For example the string is 'JA', then both JA1RL and W1JA will be matched. Search is not case-sensitive and regular expression is also acceptable here. And if you check 'dx', the callsign of spotted DX station will be searched, otherwise (i.e. 'de' checked) that of the station spotting it to his/her cluster node. All station will be matched when this field is blank.

LAST: Select the maximum quantity of last spots returned as answer. We, JADXC-WG, kindly ask all the users to SELECT AS MINIMUM NUMBER AS YOU NEED in order to avoid the overload of our server and leased line.