How can I narrow it down to the accurate and lower range of CIDR using reverse IP

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Question:

How can I narrow it down to the accurate and lower range of CIDR using reverse IP lookup (or if any other method pls suggest)

Please give a sample too, for clearer instructions,

thank you!

10.0.0.0/8 - corporate_network-1

192.168.0.0/16 - corporate_network-7 192.109.0.0/16 - corporate_network-8 170.34.0.0/16 - corporate_network-5 160.46.0.0/15 - corporate_network-2 172.16.0.0/12 - corporate_network-6 160.52.0.0/16 - corporate_network-4 160.48.0.0/14 - corporate_network-3