This is NGA. I'm a NGA contractor and I work out of state from the NGA Campus East (NCE) complex and receive calls from this blanket PBX number all the time. This isn't to say there may be wrong numbers being dialed from there (their contact phone numbers are sometimes very hit or miss or old). It's also possible there may be persons in NGA doing things they shouldn't (or maybe they should, like Darryl mentioned in support for veterans), like cold calling, attempting to recruit new employees (some people make a nice side income on referral fees), etc. It is after all a rather large agency.