How to check an IP address is blocked by IP Route?

My server is constantly getting attacked by Amazon India servers.

I added 35.154.0.0/16 range to the route for IP address 35.154.252.15

ip route add blackhole 35.154.0.0/16

But when I check if the IP address is blocked, it does not output anything.

ip route show 35.154.252.15

How can I make sure 35.154.252.15 is blocked by ip route?

man ip-route:

   ip route get
          get a single route
          this command gets a single route to a destination and prints its
          contents exactly as the kernel sees it.

So try:

ip route get 35.154.252.15

How to check an IP address is blocked by IP Route?

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