DHL is a bit of a confusing entity. Roughly speaking, there appear to be 3 'segments' to just DHL alone:
1: The core DHL organization (a.k.a. Deutsche Post: German Mail), focusing on enterprise customers; so B2B mostly. Except if you're in Germany, probably, because there Deutsche Post is still the main mail carrier AFAIK.
2: The DHL Express organization, which appears to be mostly consumer-oriented. Maybe they only serve Europe; I don't know.
3: Local subsidiaries that work under the DHL moniker, but are sometimes still organized as the separate entities they once were, and remain somewhat disjunct from the other entities.
I've had packages being handed over from one DHL entity to another and basically none of the DHL group accepting responsibility for them. At one point, I found myself being referred by DHL/Deutsche Post to DHL Express, from them to a local DHL entity and by them back to DHL/Deutsche Post because all entities denied that they were handling the package. The situation was basically that one entity took receipt of the package from the sender, another entity transported it across the border, and the third entity was responsible for delivery to my address. This particular package also had two or three distinct shipping IDs at that point, and in calling around I arrived at the conclusion that the IT systems of those entities are still not integrated: they use their own systems, with only weak interfacing for handover of packages from one entity to another.
So your question "which service" probably has no clear answer. It depends, and what it depends on, is likely not visible from the outside - not for the receiver, nor for the sender. Which is to say, ADOX will also not be aware which part of DHL handles the package once it's handed to them.