If you don't know anyone in DC. Then chances are it's a spoofed phone number being used by scammers operating out of India. Most likely IRS scam, or maybe loan scam, grant scam or any one of a variety of scams coming out of India.
Caller ID came up as Julie Ellis - she asked for my boss by name and hung up on me when I told her he was busy. You will also find a ton of comments about her BS calls here under the phone number 202-525-1708.
Just received a call from this number. She asked for my boss and said her name was Julie Ellis and it was in regards to Prime Investments. When I told her he was away from his desk she hung up on me.
Same here! She called for my boss. I said he was unavailable and she RUDELY hung up. If you are not going to be courteous, don't expect the return favor.