Are there 500-700 level credit online sites?

[Johmford]

500-700 level is not the best way to ask - because not all schools have masters courses with those course numbers.  Schools have different numbering systems, so don't make that your search - instead, look at "master's" or "graduate" level work.

Ex: The WGU courses are 200s for the MBA. 200, 202, etc

It might be best to post what program you are thinking of entering and work backwards to determine if there is anything you can do online.