Diners Club EnRoute doesn't have IIN ranges on Wikipedia, but we can consider that they are missing. An thread is open on the "talk" section to add them:
Add missing Diners Club enRoute IIN ranges
Currently there is none. I looked online and found four tertiary sources mentioning that enRoute cards start with 2014 or 2149:
http://www.iinbase.com/
https://baymard.com/checkout-usability/credit-card-patterns
https://business.mapsofindia.com/finance/credit-cards/credit-card-number.html
https://binlists.com/
This match the number on the picture from enRoute's page: https://en.wikipedia.org/wiki/EnRoute_(credit_card)
Diners Club EnRoute doesn't have IIN ranges on Wikipedia, but we can consider that they are missing. An thread is open on the "talk" section to add them: