In my area, frequency 2387 Mhz and below is used, also with 2502 Mhz and upper. So I think it's safe to use a frequency range between channels 12 and 14.
Different channel lists exist for Indonesia inside ROS:
[u@d] /interface/wireless/info> country-info indonesia
ranges: 2402-2482/b,g,gn20,gn40(20dBm)
2417-2457/g-turbo(20dBm)
5735-5835/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(30dBm)/outdoor
5740-5820/a-turbo(30dBm)/outdoor
5745-5825/a-turbo(30dBm)/outdoor
902-927/b,g,g-turbo,gn20,gn40(30dBm)
[u@d] /interface/wireless/info> country-info indonesia2
ranges: 2402-2472/b,g,gn20,gn40(20dBm)
5735-5835/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(30dBm)/outdoor
5740-5820/a-turbo(30dBm)/outdoor
5745-5825/a-turbo(30dBm)/outdoor
u@d] /interface/wireless/info> country-info indonesia3
ranges: 2402-2472/b,g,gn20,gn40(27dBm)
5735-5835/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(27dBm)/outdoor
5740-5820/a-turbo(27dBm)/outdoor
5745-5825/a-turbo(27dBm)/outdoor
[u@d] /interface/wireless/info> country-info indonesia4
ranges: 2402-2472/b,g,gn20,gn40(20dBm)
5170-5320/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(20dBm)
5735-5815/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(20dBm)
[u@d] /interface/wireless/info> country-info indonesia5
ranges: 2402-2472/b,g,gn20,gn40(20dBm)
5735-5815/a,an20,an40,ac20,ac40,ac80,ac160,ac80+80(30dBm)
Except for the
indonesia (without digit suffix) they all limit up to 2472 MHz, which is channel 13. The first one has upper limit of 2482 which is not channel 14 (proper channel 14 center frequency is 248
4 MHz) and IMO it would be safe to assume it's actualy a typo.
Which all means that channel 14 is off limits in Indonesia. If you use it, you may risk some consequences from your friendly local telecomms regulator.
It is also highly probable that quite a few client devices won't work with channel 14 (AFAIK channel 14 is only really allowed in Japan and only for 802.11b), many client devices figure out their whereabouts (e.g. from the MCC of mobile network they're using) and only allow using wifi channels permitted in that country.