Fliegergruppe Langenhagen or Hannover?
 

Dear members,

what is the correct name of the Fliegergruppe which I./KG 27 belong to during the prewar and early war period, when based at Hannover-Langenhagen?
Does anyone know its telephone number?

I'm aware of similar affiliations of II./KG 27 and III./KG 27 (and their tel. numbers too), but didn't find any info (or a photo which would clearly show the inscription on a plane) on the I. Gruppe.
Any help appreciated.

Best regards,
Maciej