After releasing the November patch for its Galaxy S7 and S7 Edge a while ago as PK1 update, the same build no. with albeit different software version is available for the Galaxy S6 and S6 Edge at the carrier.
The build no. for the AT&T S6 is G920AUCS5DPK1, which comes at 21.85MB of size. While that for AT&T S6 Edge is G925AUCS5DPK1, at 21.05MB.
Both devices have the PK1 update available as an OTA, and would complete the roll out within next two weeks at the max we assume.
In other news, LG today released the G5 Android 7.0 update (20A) for its international users too, those who have the model no. H850. The Nougat update KDZ is also, making it easy for G5 users to can manually install it without waiting for the OTA.