Constellation from SAO number?

Hello,

how can I tell the constellation where a star is, from its SAO number?
I mean: are there catalogs or lists or whatever that tell this?
I have a full SAO file but I can't see this information.

Of course, I may find out this information from the coordinates (RA
and Decl), but this would be very long (if I have hundreds of stars).

One question: due to precession, coordinates change, but I understand
that the boundaries (of constellations) change either, so all the
stars remain in their constellation (if proper motion is not
considered - I am talking about precession only). Is it correct?

By the way, the only source where I can find the constellation of a
SAO star is a "star name seller":
http://www.starcatalog.com/catalog.html
However, not all SAO stars are listed, so this is not useful to me.
And I don't need to name a star in their database :-)

Thanks,
Giancarlo