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When using Skype, It always shows up as a different number on caller ID. Sometimes it shows up as a weird number i.e.: 123456789 and sometimes it shows up as a correct number with a random area code.

Does anyone know why this happens?

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Sounds like you need to set up your caller ID:

You can use online numbers from Denmark, Estonia, Hong Kong, Japan, Poland, Sweden, United States and the UK. Hopefully we will be adding more countries to the list shortly.

How to set up caller identification:

Caller identification, as we call this feature, is easy to set up. Simply sign in to your account and follow the on-screen instructions.

Please note that if you have previously set up your mobile number to show when sending SMS messages you don't need to verify the number again. Just choose to use the same number to show for SkypeOut calls.

You will see a screen similar to this:

Skype screenshot

In this case you can choose between using your online number or the mobile phone number associated with your Skype account.

If you have not previously associated a mobile number with your Skype account, you will need to verify the mobile number by following the instructions sent to you in an SMS.

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