If you've ever tried calling 311 from your cell phone with a 240, 301 or other area code when you are outside the city, you know it doesn't work! The solution is dialing (202) 737-4404. This gets you to the Mayor's Citywide Call Center.
As pointed out by DC gov staff, you can call 311 from inside the District from non-202 area codes (though that still doesn't work for me - but then, I am special). and get right through to the call center.
Tuesday, January 18, 2011
"311" only works from 202 area code (update 3:00 pm)
This has been updated from the original post thanks to the diligence and quick actions of some DC government staff