Scam artists calling with threats! They picked the right caller area code for DC (202). They use automated calling devices, and keep calling repeatedly. Given that I only pick up my phone for known callers, they all go to voicemail on my phone.
Shockingly, it seems some people do fall for these scams. Just this week in my town, there was a news item about one person being taken in. On receiving a scam call, this person immediately filled a Green Dot card (the favorite device of scammers) with cash and transferred it to the scammer.
Here's is a audio of the voicemail scam as an example of the threats and messages left. This one showed 202-506-9988 as the caller-id, and the message said to call 202-506-8147 immediately. So, these are the currently used number by these scammers.