KLM Cityhopper is the regional arm of KLM Royal Dutch Airlines. The code KLc is used for the Cityhopper operations, which fly from Schipol International Airport.
KLM uk and KLM Cityhopper were once separate entities, but KL Cityhopper has now swallowed the operations of KLM uk.
KLM Cityhopper flies a fleet of Fokker F50's and Fokker F70's.