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The carrier always prefers to have the called number and the calling number in E164 format. 

If the called number is not in E164 format and the ANI is not a valid ANI, call termination is not guaranteed. 

Customer should always write the called number in E164 format (without a + sign as Cyara adds it automatically.)

For example the correct called number for US is:

18558434662 where 1 is country code and 8558434662 is the called number.

Similarly, the ANI that you are using should be a valid ANI and the format should be E164.

For the ANI field, you can add a + sign

Example:

18558434662;From:+16508256802

In this example, +16508256802 is the ANI used.