Who called from 2402250988

Anyone knows who this is?

Caller ID: Frederick, MD.  left no message as usual. Lots of calls from this location lately. All blocked.

Called my landline on 11/8/2016 at 6:08 PM and CID displayed Frederick MD 240-225-0988 and as usual, no VM was left. Since no VM was left, the call wasn't important to begin with.
Way too many unwanted calls from that particular area code.
Caller: Frederick MD 240-225-0988
Call type: Nuisance call

Left job message.  Have gotten bogus from that area code in the past.

CID = "Frederick    MD". 2 digits off from the FOP police scam already identified (240-225-0986). They did not choose the option to bypass my phone call blocker so I don't know what they wanted. Presumably a robocall. Now blocked.