Comment: Where in the dickens

How in the world am I supposed to correlate a bunch of apparently random numbers:
6850019 5 $ 2.75
7410003 5 $ 2.75
7510006 5 $ 2.75

to any physical location? I'm in Whittier, Cong. Dist 39:
http://www.lindasanchez.house.gov/templates/lindasanchez/ima... (I'm at the little red arrow-thingie over towards the eastern side)

and if I plunk down five or ten bucks for a mailing, I don't want them winding up in Commerce or something; I'd rather hope that there are enough real citizens in this sanctuary district to make a difference.

Is there maybe a cross-reference of some kind? Like an address book or something?