Radio Amateurs from Mexico will be active using special call sign 4A90SNL from Ojo de Agua, Montemorelos, Nuevo Leon, Mexico.
They will operate on HF Bands.
QSL via LOTW and QRZ com Log Book only.
QTH Locator - EL05bf.
Information from XE2N.

4A90SNL Montemorelos, Mexico