How do you write 1130 until 230?

To indicate the time from 11:30 to 2:30, you can write it as "11:30 AM to 2:30 PM" for clarity, specifying whether the times are in the morning or afternoon. Alternatively, you could simply write "11:30 - 2:30" if the context is clear. If you're using a 24-hour format, it would be "11:30 - 14:30."