Ive Block 1900 and 976 but what else should I block?

[JeffG1]

I have block 1900 and 1976 from my callmanager to prevent abuse, are there other codes that I should block. What about 809? How about the 20 other splits of 809? I just got some spam about 809 area codes being used to scam people like 1900 numbers. But Im not 100% sure I should block 809.

[rickb]

I've never heard of the 809 area code being a problem so I did some research and came up with this link:

http://urbanlegends.about.com/library/blnote11.htm

Basically, it says that everything regarding the 809 is basically true. With that in mind, as with any good access list, block it. Once all the changes have been made (and as a good practice) I would let your users know what you have blocked, that way if they have a legitimate 809 (there are some) number then you can fix it for them as opposed to them getting frustrated at the phone system.

Rick

[eric.burgy]

Take a look at the following site. It list all of the area codes controlled by the North American Numbering Plan Administration.

http://www.nanpa.com/

Hope this helps.

[tringwelski_2]

Here is a list from the Cisco web site:

Country Area Code Blocked CM Pattern

Bahamas 242 9.1242xxxxxxx

Anguilla 264 9.1264xxxxxxx

Antigua & Barbuda 268 9.1268xxxxxxx

Barbados 246 9.1246xxxxxxx

Bermuda 441 9.1441xxxxxxx

British Virgin Islands 284 9.1284xxxxxxx

Cayman Islands 345 9.1345xxxxxxx

Dominica 767 9.1767xxxxxxx

Dominican Republic 809 9.1809xxxxxxx

Grenada 473 9.1473xxxxxxx

Jamaica 876 9.1876xxxxxxx

Montserrat 664 9.1664xxxxxxx

Puerto Rico 787 9.1787xxxxxxx

St. Kitts & Nevis 869 9.1869xxxxxxx

St. Lucia 758 9.1758xxxxxxx

St. Vincent & the Grenadines 784 9.1784xxxxxxx

Toll Charge Area Code 900 9.1900xxxxxxx

Trinidad & Tobago 868 9.1868xxxxxxx

Turks & Caicos Islands 649 9.1649xxxxxxx

U.S. Virgin Islands 340 9.1242xxxxxxx