ip firewall address list proplem

hi every one
i have rb433 .i use it as pppoe server ..i can controll in the youtube speed for each client useres
my question is /
if i put ip firewall address list like this = /ip firewall address-list
add address=109.224.0.0/16 list=“YOUTUBE ADDRESS LIST”
add address=172.217.0.0/16 list=“YOUTUBE ADDRESS LIST”
my server can limit the youtube speed of my users

if i put the ip firewall address list like this = ip firewall address-list
add address=109.224.206.0/24 list=“YOUTUBE ADDRESS LIST”
add address=172.217.18.0/24 list=“YOUTUBE ADDRESS LIST”
my server can not limit the youtube speed of my users

any one can put an explanation for this issue ,what is the wrong ??!!
what does the value X.X.0.0/16 mean and = ??

.0.0 = /16 which mean all addresses between .0.0 and .255.255 are matced
.0 = /24 which mean all addresses between .0 and .255 are matched

When you limit it with .206.0/24 you can match between .206.0 and .206.255

thank you ..do you mean the the ip= 109.224.0.0/16
= 109.224.(0-255).(0.255)
do you mean that ?
with thanks

Yes with this small correction 109.224.(0-255).(0-255)

Used notation in RouterOS. 109.224.0.0/16 or 109.224.0.0-109.224.255.255

last question please and i will be very thankfull to you
what is number that if we put instead of (16) ,the ip addresses number wil increase more and more .
i mean if we put the ip address list like 109.224.0.0/32 , we get more ip addresses ??
thank you very much

No, 109.224.206.4/32 = 109.224.206.(4-4) so a /32 is unique. 109.224.0.1/32 is a valid address and 109.224.206.0.0 is always a /16 range

.0.0.0/8 .0.0/16 .0/24 /32

Think, less is more.

thank you …
i forgot this site http://jodies.de/ipcalc?host=109.224.0.0&mask1=12&mask2=