You've not talk about ATL, are you? Unless things have changed in the last 3 months, 99% of the CR9 flights are all in concourse B with a select number of the gates being configured to support the CR9. I’ve seen a few come out of D (ramp 4) but there is only one DAL spot that has a jet way and can support the 900. All the other spots are too tight for the 900 to squeeze into. If anyone has the above problem it’s ASA seeing they have ops in ever concourse with the majority being out of C & D (Ramps 3, 4 & 5)

As for ATL terminal configuration, there is no terminal 1 or terminal 4. In order there's: T, A, B, C, D and E. So I assume you’re talking about some other airport and then you must be taking about 9E’s NWA contract and not DAL’s.