You lost fairly quickly, which implies that you still have a relatively strong metabolism, so you have some work to do. As a very rough approximation of where you should be, take the average of your last couple months' loss; for every 5 lb (2.3-ish kg), that's about a 500 calorie per day deficit that you need to make up. For instance, I was losing at 10lb per month the last three months of serious weight loss, which works out to around 1000 calories per day deficit; I was averaging 1100 calories per day, and am now maintaining (for the past 6-7 years) in the 2100-2200 range. This will at least give you an idea of how large the steps up that you should be making to ease into your maintenance range.
I started working toward maintenance at the six month mark when I was 10 lb from my goal (or about a month away) so I started increasing things then to slow things down; as this was early November, I in part just let the holidays happen and it took another two months to lose that final 10 lb, and I had minimal overshoot; I still needed to fine tune things from there, but I was pretty close by then.