Suspicious IP Addresses on Routing Table

I've been using an ONU/router combo from ISP, I feel fishy several IP addresses listed on the routing table.

IP address: [0.0.0.0], [192.168.100.0], [10.0.3.0], [10.126.208.1].

Their gtateway: [0.0.0.0], [255.255.255.0], [255.255.255.0], [255.255.255.255].

Their exit: [_INTER_R_VID_41], [br0], [Ixcbr0], [_INTER_R_VID_41].

Their source: static route, system, system, system.

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I thinks the [0.0.0.0] and [192.168.100.0] is fine which I'm using with. The 192.168.100.0's exit (br0) looks fishy though. (192.168.100.0 is acutally in bridged mode?)

But what does the 10.0.3.0 and 10.126.208.1 affect to my internet traffic?

Anyone share thoughts?