Probably sold to another CA. I would keep a close eye on my CR and my mailbox. Several CAs will just go ahead and delete when they sell the debt to another CA, that way they don't have the headache of having to deal with disputes and such.
July 2013 score: EQ FICO 819, TU08 778, EX "806 lender pull 07/26/2013
Goal Score: All Scores 760+, Newest goal 800+
Take the myFICO Fitness Challenge
Current scores after adding $81K in CLs and 2 new cars since July 2013
EQ:809 TU 777 EX 790 Now it's just garden time!
June 2017 update: All scores over 820, just pure gardening now.