GeoIP updates for owned IP Blocks, how does everyone handle these?

How does everyone manage the GeoIP coordinates for their various IP blocks w/ ARIN/etc?

I have some registered to our corporate office in Canada, but we are using them in the US and its causing some services that do geoip lookup to mess up (being taken to google.ca/etc), I submitted an update w/ MaxMind but not sure if there are other places I should be updating /changing things as well.

I couldnt find any settings in ARIN on a per IP block basis for this but maybe I was missing something.