I know you don't care since it's not your phone, but never put ESN #'s online or other private info. For next time, just call Sprint Costumer Service and they can check for you in seconds.
Thanks for the post, and I apology for the delayed response.
I would agree with the previous poster, when it comes to sensitive information such as ESN's I would not encourage you to post publicly.
Therefore, I have sent you a private message with the information requested.
Please let me know if there is anything further I can do for you.
Social Care Team