Examples disclosed herein relate to automatically updating of zoning information in a SAN. In an example, a network switching device in a SAN may automatically detect a new HBA port at a port where a prior HBA port was coupled. In response to detecting, network switching device may automatically determine a zone that the prior HBA port belonged to, from a map database on network switching device that stores mapping information comprising an ID of the prior HBA port, an ID of the port, a zone name associated with the ID of the port, and a status of the zone. In response to determining, network switching device may automatically update zoning information on network switching device to replace the ID of the prior HBA port with an ID of the new HBA port, for the zone that the prior HBA port belonged to.