I've known about this issue since Lllama 1. Tried it with Llama 2 and Mistral when those models were released. LLMs are not databases.

The test I ran was to ask the LLM about an expired domain of a doctor (obstetrician). I no longer remember the exact domain, but it was similar to annasmithmd.com. One LLM would tell me it used to belong to a doctor named Megan Smith. Another got the name right, Anna Smith, but when I asked it what kind of a doctor, which specialty, it answered pediatrician.

So the LLM had no clue, but from the name of the domain it could infer (I guess that's why they call it inference) that the "md" part was associated with doctors.

By the way, newer LLMs are very good at making domains more human readable by splitting them into words.