"172.24.43.226/27" means "the subnet starting at 172.24.43.226 with a mask of 27 bits (255.255.255.224)". It doesn't mean "172.24.43.226 or 172.24.43.227". There error means that given a mask of 27 bits, 172.24.43.226 is not the start of a subnet.

In reply to Re^2: Net::IP Invalid Prefix? by ikegami
in thread Net::IP Invalid Prefix? by true_atlantis

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