Is Institute of Electrical and Electronics Engineers. Transactions on Information Theory a good journal for coding theory?

I am reading the profile of a faculty working in coding theory. The faculty has 20 publications in this IEEE Transactions on Information Theory journal in ten years, 7 publications in Discrete Mathematics, and 1 publication is European Journal of Combinatorics.

I am not familiar with coding. My feeling is that the DM journal is a good one in combinatorics, and might be the bottom line of a "good" journal in combinatorics. European Journal of Combinaotrics ranks higher than DM. (It coincides with the numbers seven and one, as it is harder to publish in better journal.)

In the faculty's self-introduction, it is claimed that IEEE Transactions on Information Theory is a flagship journal in coding. I am wondering is that true?

My feeling is that if someone publishes 20 papers in "flagship" or "top" journals in combinatorics (like JCTB or Combinatorica), the person must be very well-known.

Perhaps this IEEE Transactions on Information Theory journal in coding theory is even not as good as Discrete Mathematics journal?