Custom Bot/Robot #20 how to ban

How to ban this bot

[silverbytes]

Does someone know about Custom Bot/Robot #20?

Someone told about this:
"I seem to be gathering some info..... anyone ever heard of (+http://www.omni-explorer.com) Internet Categorizer?"

What would be the syntax to .httaccess ban (the #20 and the Bot/Robot confuses me...)

[wilderness]

Custom Bot/Robot #20

If the above is the complete name of the bot?

SetEnvIf User-Agent ^Custom keep_out (or whatever term you use other than keep_out)

or

RewriteCond %{HTTP_USER_AGENT} ^Custom [OR] (Note the [OR] is used only if you have other Rewrite lines following this line.)

There's a recent thread on omni:
[webmasterworld.com...]

[silverbytes]

It seems to be the name yes