Postal Service Address

Contact Information

Postal Address

The U.S. Postal Service (USPS) address for Arecibo Observatory is:

Arecibo Observatory
HC3 Box 53995
Arecibo, Puerto Rico, PR 00612-8346

However, letters and parcels sent via ``courier services'' such as Fed-Ex, USPS, Airborne, etc., must use the physical address of the Observatory:

Arecibo Observatory
Route 625
Bo. Esperanza
Arecibo, Puerto Rico, PR00612

All telephones at the Observatory have extensions to the basic observatory number (787) 878-2612. The extension should be dialed when prompted by the introductory message. FAXes to the Observatory should be sent to (787)-878-1861.