The database extracts are colon-delimited ASCII in the following format: 

Identifier:Callsign:User/Organization:Location:Frequencies(USB or LSB):Mode triggered by ALE

(U or L after the listed frequency indicates Upper or Lower Single Sideband) 

Select identifiers:  

0-9 , A , B , C , D , E , F , G , H , I , J , K , L , M , N , O , P , Q , R , S , T , U , V , W , X , Y , Z  
 
Sources: WUN Postings, ALE Database, Personal Monitoring