Is it considered good practice for a phone provider to strip the 64 off CID's and present them with an '0' in front instead.

Just came across someone on the Voyager VoIP platform and everything gets sent through with 64 in front. And to add to that they couldn't make calls out to numbers within their LICA without sending their CID with 64 in front of it. Really weird.

On 2Talk CID gets sent with the 0 in front but I know they have not always 'done the right thing' in terms of standard. Just wondering if Voyager are doing the right thing or if I should bring it up as being a bit out of the ordinary.