81.28.236.0 is the Network Address in 81.28.236.0/23
CIDR block	81.28.236.0/23 !cidr !bgp
Valid CIDR block	81.28.236.0/23
Range: Network - Broadcast	81.28.236.0 - 81.28.237.255
Netmask	255.255.254.0
Number of IP addresses in the block	512
Network Address: 81.28.236.0   !ip !rdap !whois !bl !ptr24 !scan !tr !dnstr !g !gsec
Broadcast Address: 81.28.237.255   !ip !rdap !whois !bl !ptr24 !scan !tr !dnstr !g !gsec
!g 81.28.236.0/23

  
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