Monday, October 19, 2015:

Tuesday, October 20, 2015 - 5:00 AM to 7:00 AM ET - Server Maintenance: CDX Web and the Exchange Network may experience intermittent outages due to monthly patching.

Wednesday, August 26, 2015:

Friday, August 28, 2015 - 7:00 PM to Saturday, August 29 2015 - 6:00 AM ET – Network Maintenance: The CDX Pre-Production Environment may experience intermittent outages due to network maintenance.

Wednesday, August 19, 2015:

Sunday, August 23, 2015 - 6:00 AM to 12:00 PM ET - Database Upgrades: CDX Web and the Exchange Network may experience intermittent outages due to database maintenance.

Wednesday, August 5, 2015:

Sunday, August 9, 2015 – 7:30 AM to 12:00 PM ET – Database Maintenance: The CDX Pre-Production Environment may experience intermittent outages due to database maintenance.

Tuesday, July 21, 2015:

Friday, July 24, 2015 - 7:00 PM to Saturday, July 25 2015 - 6:00 AM ET – Network Maintenance: The CDX Pre-Production Environment may experience intermittent outages due to network maintenance.

Wednesday, July 15, 2015:

Friday, July 24, 2015 - 9:00 PM to 12:00 AM ET - Network Maintenance: CDX Web and the Exchange Network may experience intermittent outages due to network maintenance.

Wednesday, July 8, 2015:

Thursday, July 9, 2015 - 9:00 PM to 10:00 PM ET - Server Maintenance: CDX and the Exchange Network may experience intermittent outages due to server maintenance.