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Execu/Tech Systems, Inc. software DOES NOT STORE CREDIT CARD NUMBERS. We only store a token that's returned by Shift4. This is not a credit card number and does not contain the credit card number. Execu/Tech Systems, Inc. does not have access to the credit card numbers of your guests and can't provide them to you. If you need to see a credit card number, you must contact Shift4 for assistance.
https://www.shift4.com/pdf/Shift4-TrueTokenization.pdf
It is highly recommended that you use EMV PIN Pads or encrypted card readers to enter cardholder data.
This information comes from the Shift4 UTG Installation and Configuration Guide
Cloud Hosting EMV Network Data Flow
http://https//www.shift4.com/pdf/Shift4-TrueTokenization.pdf
* The IP addresses in this image are examples. Do not attempt to configure your network / firewall / router with these examples.