Pathfinder Online to Discover QSL Info :

Pathfinder Online lets you type a callsign once and search more than 80 different sites for QSL information with a few mouse clicks.

The Web site also has a link for calculating postage to get QSLs delivered between here and there, as well as between there and there. A link for International Reply Coupons (IRCs) provides the lowdown on the current status of IRCs.

Pathfinder Online also has links less related to QSLing, but more related to making actual contacts that result in QSLs, including a trio of DX-related links and a quintet of propagation-related links.

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.

Actual Link: http://www.dxlabsuite.com/pathfinder/WebClient/

Source: DXlabsuite