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New Member

Blocking Outbound Calls - Recommended List

Is there a list of phone numbers that are considered non-business related? I know the obvious ones like 900 #'s but I was wondering what other phone numbers we should consider blocking through our Call Manager solution to prevent the company from unnecessary liability.


Nathan Richie

VIP Super Bronze

Re: Blocking Outbound Calls - Recommended List

I typically block:

-9[1-8]11 (Misc. telephone services that users typically don't need. 411 being the most obvious. You may need to make exceptions for visually impaired users or in areas where the city requires access to things like 211/311.)

-91[2-9]5551212 (Long distance directory assistance).

-911010T (Carrier selection codes to override your default long distance operator. You will be charged a much higher "casual calling" rate by whomever they pick. Think "10-10-288".)

-Most of the Caribbean. They participate in the North American Number Plan (NANP) along with the U.S. and Canada. This means they will have normal NPAs that you can block (91242....... for example).

New Member

Re: Blocking Outbound Calls - Recommended List

Thanks Jonathan!

VIP Super Bronze

Re: Blocking Outbound Calls - Recommended List

Correction: The LD DA should look like this: 91[2-9]XX5551212

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