Huh ... I would have guessed that it was a temoprary Boeing registration. However, Southwest is switching to four-digit ship/fin/nose/skrillex numbers as part of the AirTran integration, and Boeing temporary registrations usually end in a 'B'. (I.e., IDKWTFLOLBBQ)
 
Because I'm also part of the liberal nerdfest, the planned deliveries of 737-800 to LUVHQ all have 83xx-series registrations (except for the last):
- 36980 N8301J
 
- 36983 N8306H
 
- 36985 N8309C
 
- 36987 N8307K
 
- 36990 N8314L
 
- 36992 N8317M
 
- 36994 N8319F
 
- 38807 N8310C
 
- 38808 N8311Q
 
- 38809 N8312C
 
- 38810 N8313F
 
- 38811 N8315C
 
- 39882 N8600F