Options trading hours

This seems like a very simple and ignorant question but what are the options trading hours? 9:30am to 4pm? or does it go to 4:15pm? Options in question are the ones for QQQ and similar ETFs. TIA
 
Sorry about the double post. Didn't know the board was moderated and that there is a delay between submission and posting.
 
ALL equity options and ETF/ETN trade from 9:30 am to 4:00 pm est except the following trade until 4:15 pm est.

DIA
EEM
EFA
IWM
IWN
MDY
OEF
QQQ
SPY
UNG
UUP
VIXM
VIXY
XHB
XLB
XLE
XLF
XLI
XLK
XLP
XLU
XLV
XLY
XME
XRT
VIIX
VXX
VXZ
 
I did poke around there yesterday just before my post but I ran out of patience. It was a bit late. Thanks again.
 
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