import arcpy
fc = 'C:\........\Einzelpunkt.shp'
fields = ['Identifika']
#setting up the max value variables
Zone1=0
Zone2=0

# For each row in the attribute table, use if statements
# to determine which category it is in and if it is bigger
# than the current max value for that category, update the
# max value variable
with arcpy.da.SearchCursor(fc, fields) as cursor:
	for row in cursor:
		if row[0]<20000 and row[0]>Zone1:
			Zone1=row[0]
		elif row[0]<30000 and row[0]>Zone2:
			Zone2=row[0]

#keep adding elif statements to cover the rest of the Zones
#this will print out the last number used in the Zone category
		print "Zone1="+str(Zone1)
		print "Zone2="+str(Zone2)
		break