Please register the main line with "Web Billing."

Then you can check the total amount of charges, each charge of lines (per phone number) and breakdowns for all lines under the "Omatome Seikyu Service (combined billing method)."

It is possible to register the sub-line of "Omatome Seikyu Service" with "Web Billing."

However, If the contract holder of sub-lines is the same as that of the main line, you can "add the sub-line" to the main line of "Omatome Seikyu Service."

Then you can use "Web Billing" for the sub-lines.

If the contract holder of the sub-lines is not the same as that of the main line, please make the application to register the sub-lines with "Web Billing" from the contract holder of the sub-lines of "Omatome Seikyu Service."