C/o Wlrk 51 West 52nd Street
New York, NY 10019-0000
Curious where the data comes from. The USPS reserves almost all rights on addresses and only releases them to licensed vendors for certain uses, and I doubt this is one of them.
Even licensed vendors don't get the full list, they get an encrypted database of the address and a C library with which to query it. (Source: I worked for such a vendor and wrote code to interface with said C library.)
Getting a really large list of valid residential addresses in the united states is 100% completely trivial.
For example, all the registered voter databases are for sale or free (though generally only allowed to be used for "political purposes", and not "commercial purposes", if you get them from the state themselves).
Even licensed vendors don't get the full list, they get an encrypted database of the address and a C library with which to query it. (Source: I worked for such a vendor and wrote code to interface with said C library.)