Several check processing regions have been consolidated, so there's a good chance that if you haven't updated your procedures for awhile, they're probably out of date. The list of routing numbers in each check processing region that remains is here
That's the perfect place to look. I just got through posting an informational update to that page that indicates the Fed plans to complete consolidation of check processing into the Cleveland office by the first quarter of 2010.
One of the offices whose check processing will be moved to Cleveland is Los Angeles, which is a "scan and print" office already. That suggests strongly that, by the end of this year (according to the Fed's 7/31/09 announcement) there will be only two "local" areas -- centered in Cleveland and Atlanta, and by 3/31/10, there will be only one -- centered in Cleveland. That will mean that all checks other than qualifying next-day items will considered local for Reg CC purposes.
It's interesting that the Fed also said that banks will have to make their own check transportation arrangements beginning in 2010, and made some pretty strong suggestions that banks that are still hanging on to paper item exchange had better think about going to image and electronic.