Pathfinder Online lets you type a callsign once and search more than 80 different sites for QSL information with a few mouse clicks. To use Pathfinder Online, navigate tohttp://www.dxlabsuite.com/pathfinder/WebClient
type a callsign into the Target Callsign box in the upper-left corner, and then click on one of the search buttons along the top; the results of this search will be displayed in the frame below the horizontal divider. If the search fails to yield a QSL route, click on one of the other search buttons. User ratings are provided for the major QSL information sites.
The country-specific callbook search button, labeled CBA, is special. As you type a callsign into the Target Callsign box, Pathfinder Online identifies the callsign's DXCC entity. If a country-specific callbook is available for the callsign's DXCC entity, the box to the right of the CBA button will display the callsign's country's DXCC prefix. If you type OH2BH into the Target Callsign box, for example, the box to the right of the CBA button will display OH ; if you then click the CBA button, Pathfinder Online will search the Finnish online callbook and display Martti's address.
Pathfinder Online provides access to the following 76 country-specific callbooks:
3A, 4S, 4X, 5Z, 9A, 9M2, 9M6, A9, BV, BY, C3, CE, CE9, CX, DL, DU, E7, EI, EP, ER, ES, EW, EY, F, FR, GU, HC, HL, HS, I, J7, JT, K, LA, LX, LY, LZ, OA, OD, OE, OH, OL, OM, ON, OZ, P2, P4, PY, R1F, R1M, S2, S5, S7, SM, SP, SU, SV, SV9, T7, TA, TF, TR, UA, UA0, UA2, VE, VK, VP9, VU, YB, YL, YN, YO, Z3, ZL, and ZS.
Some of these are automatically searched for the Target Callsign (like the Finnish callbook), some will display an entry with a hyperlink you must follow to get an address (e.g. the Australian callbook), and others are lists of callsigns that you must manually peruse (like the Bangladeshi callbook).
When the Target Callsign specifies a US callsign, the CBA button queries the FCC database for QSL information.