The GWC guesses so far:
Ortstock 4444
Madrum 4476
Hans Brix 4465
UNZBUZ 4343
Mrmoshe 4469
Matyd 4532
Tony123 4451
Saltocan 4333
Corporate 4437
Mattrix 4321
Stocktrek 4275
Capre 4333
Epaka 4488
Jazzasax 4450
Staz024 4520
Iam 4420
Patient1 4457
mmlh 4447
DrDaz 4360
Psi4eva 4580
Callent 4468