curl --request GET 'https://api.apilayer.com/bank_data/iban_validate?iban_number=DE89370400440532013000' \
--header 'apikey: YOUR API KEY'

{"valid":true,"iban":"DE89370400440532013000","iban_data":{"country":"Germany","country_code":"DE","sepa_country":true,"checksum":"89","BBAN":"370400440532013000","bank_code":"37040044","account_number":"0532013000","branch":"","national_checksum":"","country_iban_format_as_swift":"DE2!n8!n10!n","country_iban_format_as_regex":"^DE(\\d{2})(\\d{8})(\\d{10})$"},"bank_data":{"bank_code":"37040044","name":"Commerzbank","zip":"50447","city":"K\u00f6ln","bic":"COBADEFFXXX"},"country_iban_example":"DE89370400440532013000"}