account.windowsazure.com/Subscriptions should show SubscriptionId on the list
If I have same subscription name, in example, "Microsoft Azure Sponsorship" or "Visual Studio MSDN", they listed in same name.
I hovered one of items and the link shows "https://account.windowsazure.com/Subscriptions/Statement?subscriptionId=d2e9f440-9357-430e-a1bc-6d" but I found some SubscriptionID strings are completely different in real.
Thanks for your suggestion. We’re in the process of moving functionality into the Azure portal in order to consolidate billing and service management into a single place. I recommend visiting https://portal.azure.com/#blade/Microsoft_Azure_Billing/SubscriptionsBlade to see your subscriptions. You’ll find the ID in that list.