WiFi extenders

[Nontechy4]

How can I tell if a WiFi extender is on my router?

[plemans]

Not much info here at all. Best bet would be to log into your attached devices page and see whats all connected. 

What router are you using?

Are you concerned someone has hooked one into your network or why are you asking?

[Nontechy4]

Thanks for reply. Learning to navigate this site and choose appropriate forum.

Will keep looking.