e.g.
http://www.nasdaqdod.com/NASDAQAnalytics.asmx?op=GetEndOfDayData
where MarketCenters IN ("Q","W","B","M","C","I","D","Z","P","N","A","E","J","K","X","Y","T","U","u")
1 Q The NASDAQ Stock Market LLC NSDQ
2 W CBOE Stock Exchange CBOE
3 B NASDAQ OMX BX, Inc BX
4 M Chicago Stock Exchange...