Borderlands 2 - 5 Free Golden Key Codes

For those who dont know or havnt kept up with the Borderlands 2 keys there is 5 freebies for everyone to get. The codes are as followings:

echo cast
WTWBB-ZJ9Z5-69XJ6-KRTBB-ZHBBH

Facebook
5JWTJ-JCSSC-6S6TX-5RBTJ-9RZBJ

Claptrap web series
5BCJB-WBZS5-XZRTF-CF3BJ-B6BB6
5BC3B-KXFZK-BK5C3-HJW3J-T3KBB

IGN
WTWBJ-HKZ5H-XHFTF-WX3JJ-6HRS6

These codes have no known expiration date, but use them the sooner the better. Not sure how much each is worth but I am pretty sure I had 10 more keys after redeeming the codes.