Optional Fields for the BIN Lookup Service Using the REST API {#bin-lookup-opt-fields}
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Reference guide for optional fields that can be included in BIN Lookup Service requests to provide additional processing information and network specifications.
These fields are optional for a BIN Lookup Service request:

[paymentAccountInformation.network.id](https://developer.cybersource.com/docs/cybs/en-us/api-fields/reference/all/rest/api-fields/payment-account-info-aa/payment-account-info-network-id.md "")
:

[processingInformation.binSource](https://developer.cybersource.com/docs/cybs/en-us/api-fields/reference/all/rest/api-fields/processing-info-aa/processing-info-bin-source.md "")
: