SWA100 Flight KLAS to KMKE on 4/Divert to DEN - Tail Number?

Southwest Flight 100 from KLAS to KMKE on April 24, 2015 was diverted to KDEN due to pressurization issues. Any idea of the tail number or ICAO code? Does not appear in the detail.

Just curious and would like to track this specific plane going forward.

Thanks.

According to FlightRadar24, it was N8647A.

Aircraft operated DEN-DAL this morning as WN1956 and is now finishing out the day on a DAL-DEN-MDW-RSW trip as WN2620. First two flights today have been at normal cruising altitudes and everything appears normal. Whatever it was, DEN maintenance fixed it pretty quickly overnight.

Matt