I can also confirm that this number has a relation to the Peace Corps. A friend of mine serving in South America for the Peace Corps called me from the main Peace Corps office in her country and this is the number that came up when she called me.
This is the number for the Peace Corps swtichboard. It just means you got a call from someone there. Validated (I got the call this morning) and it was my sister who works for the Peace Corps in DC.
I can also confirm that this number has a relation to the Peace Corps. A friend of mine serving in South America for the Peace Corps called me from the main Peace Corps office in her country and this is the number that came up when she called me.
This is the number for the Peace Corps HQ in Washington DC. Any internal caller from Peace Corps HQ, irrespective of their extension, displays this number on your caller ID. It is not spam or anything foreign.