Due to the history of the internet, anything ".com" should be assumed to be a commercial entity.
If you are from the US, the only nation who doesn't frequently use a national TLD, the onus is on you to judge if a site is commercial, US-specific, global, or something else entirely.
If you are from the US, the only nation who doesn't frequently use a national TLD, the onus is on you to judge if a site is commercial, US-specific, global, or something else entirely.