Ask HN: Are OpenAI models IP-range restricted?

I oserve that the availability of OpenAI models seems to be tool and/or IP-range restricted. Does anyone else observe something similar?

I have NOT verified my "organisation". So I can not use "llm -m o3", OK. However, at the university, I can use o3 and o3-pro with aider. No errors. Same API key. At home, I can not use o3-pro with aider, error is roughly "chat/completion does not support this model, did you use the wrong endpoint?". However, aider with o3 works at home. "llm -m o3" does not work at home. I sacually checked the aider source code for some magic which would make o3 available while it does not work with "llm -m o3". Didn't find anything. This is rather strange. Does anyone else experience similar things?