Three codes could be found in the HEARING THE END post on the Investigate Ingress blog.
[1] 374u367775uu00uu7478784z47
[2] rw67io3acdnl89ea
[3] idq32fcl945lj
Code #1
Observations
Split and analyze what’s happening with the passcode format
Code #2
Observations
16 characters with the right amount of numbers for a valid passcode
Code #3
Observations
Passcode format is there, go through your usual cipher routine