Block Range of IPs

I'm trying to block a range of IPs from visiting my website

Here is w开发者_如何学JAVAhat I have in my .htaccess file

order allow,deny
Deny from 64.244.0.0/64.245.255.255
Deny from 64.244.0.0/15
allow from all

I'd like to know if anyone can tell (or estimate) me how many IPs have i blocked there?

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I believe the first DENY FROM is just wrong. I've always seen it this way

    64.244.0.0/15
Base Address^  ^Number of bits to use for subnet

This would mean that you have 2^15 addresses in the deny block.

Edit

Using the comments below, what you would want is

ORDER deny,allow
DENY from 64.244.0.0/15
ALLOW from all