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 call was probably from a scammer in a foreign country trying to get you to send the computer to some drop location or other. Or, it just might have been someone with a throwaway prepaid phone calling long distance domestically if the phone was acquired in Mexico.
Figured out what this is.
What's going on is that this is part of a large collection of phone numbers for throwaway phone and rental phone companies that operate internationally. Their system uses the internet to place an IP phone call from country A (say Burkina Faso or Czech Republic) to a location in the USA. That location then makes a call from the first available phone number in the set to your phone in the USA. If you don't pick up, then the call is dropped. Many different international providers use the same service. You will not be likely to ever get the same phone number calling twice from the same person. And of course, you can't call back.