Can I get a taxi in NYC 24/7?

I’m traveling solo for the first time in NYC. I’ll be staying in Midtown Manhattan, but will be going to the UBS Arena for a concert. The concert may end around 11pm. I was wondering if taxis are easy to get around that area and at that time?
Also, I was told to use the Curb App to book a taxi. Is this a reliable service. Thank you!
Can I get a taxi in NYC 24/7?
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