Black Cat Seen w/ Green Flea Collar 200 Block S

I saw a youger cat, all black, wearing a green flea collar in the 200 block of S Street NW. My cell is 202.276.1313. I did not see a name-tag or phone number on the collar. If I see this cat again and you know who is looking for it give me a call and on next sighting I'll call.