[Geocoding] Where do house numbers come from for Nominatim in the US?

[Eric Brelsford]

Hi,

I recently experimented using Nominatim in Brooklyn, NY to geocode around
400 addresses with house numbers. For the most part, the results are very
usable. However, some streets don't seem to have any house numbers
associated with them. For example, where

    212 5th Ave, Brooklyn, NY

returns a useful lat/lon near that house number,

    602 Livonia Ave, Brooklyn, NY

does not--it returns a lat/lon near the center of Livonia Ave.


I don't see any house numbers on either of these streets in OSM, so I'm
wondering where they are coming from. Do they come from TIGER data? Either
way, how can I help add house numbers for the streets that seem to be
missing?

thanks,

eric
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