OMG, delayed for so many days!!

May 30, 2011 21:26 Szb - SZB Clearance delay - Szb - SZB
May 29, 2011 20:03 Szb - SZB Clearance delay - Szb - SZB
May 28, 2011 20:23 Szb - SZB Clearance delay - Szb - SZB
May 27, 2011 21:56 Szb - SZB Clearance delay - Szb - SZB
May 26, 2011 21:53 Szb - SZB Clearance delay - Szb - SZB
May 25, 2011 21:53 Szb - SZB Clearance delay - Szb - SZB
May 24, 2011 21:41 Szb - SZB Clearance delay - Szb - SZB
May 24, 2011 08:12 Szb - SZB Processed for clearance - Szb - SZB
May 24, 2011 08:12 Szb - SZB Clearance delay - Szb - SZB
May 22, 2011 07:06 Szx - SZX Transport Delay - Szx - SZX
May 22, 2011 04:57 Szx - SZX Departed from facility - Szx - SZX
May 22, 2011 04:56 Szx - SZX Processed - Szx - SZX
May 22, 2011 02:05 Szx - SZX Shipment picked up - Szx - SZX

What is SZB actually?

thanks for the replies