Last Updated: Monday, 26 May 2025 By: Steve Warner

Decimal IP Address:	4294967121	( http://4294967121 )
IP Address:	255.255.255.81/28	( 0xFFFFFF51 )
Subnet Mask:	255.255.255.240	( 0xFFFFFFF0 )
Wildcard (Inverse) Mask:	0.0.0.15	( 0x0000000F )
Network Address:	255.255.255.80	( 0xFFFFFF50 )
Broadcast Address:	255.255.255.95	( 0xFFFFFF5F )
Binary IP Address:	11111111.11111111.11111111.01010001
Binary Subnet Mask:	11111111.11111111.11111111.11110000
AND
Binary Network Address:	11111111.11111111.11111111.01010000
Binary Broadcast Address:	11111111.11111111.11111111.01011111
Class of Address:	Limited broadcast, ( RFC0919 )
Number of Subnets:	16
Number of IP:	16
Number of Useable Hosts:	14
in-addr.arpa format:	81.255.255.255.in-addr.arpa
Hostname:	Not Resolvable
GEOIP Location:	-
NAT64 Address:	64:FF9B::FFFF:FF51
ISATAP Address:	FE80::0200:5EFE:FFFF:FF51
mapped IPV4:	::ffff:FFFF:FF51::/48
6to4:	2002:FFFF:FF51::/48

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Subnet  Network             First Usable IP     Last Usable IP      Broadcast
0       255.255.255.0       255.255.255.1       255.255.255.14      255.255.255.15      
1       255.255.255.16      255.255.255.17      255.255.255.30      255.255.255.31      
2       255.255.255.32      255.255.255.33      255.255.255.46      255.255.255.47      
3       255.255.255.48      255.255.255.49      255.255.255.62      255.255.255.63      
4       255.255.255.64      255.255.255.65      255.255.255.78      255.255.255.79      
5       255.255.255.80      255.255.255.81      255.255.255.94      255.255.255.95      
6       255.255.255.96      255.255.255.97      255.255.255.110     255.255.255.111     
7       255.255.255.112     255.255.255.113     255.255.255.126     255.255.255.127     
8       255.255.255.128     255.255.255.129     255.255.255.142     255.255.255.143     
9       255.255.255.144     255.255.255.145     255.255.255.158     255.255.255.159     
10      255.255.255.160     255.255.255.161     255.255.255.174     255.255.255.175     
11      255.255.255.176     255.255.255.177     255.255.255.190     255.255.255.191     
12      255.255.255.192     255.255.255.193     255.255.255.206     255.255.255.207     
13      255.255.255.208     255.255.255.209     255.255.255.222     255.255.255.223     
14      255.255.255.224     255.255.255.225     255.255.255.238     255.255.255.239     
15      255.255.255.240     255.255.255.241     255.255.255.254     255.255.255.255     


Next>


        CIDR Block          Network             Broadcast           Subnet Mask         No. IP's
        255.255.255.81/32   255.255.255.81   -  255.255.255.81      255.255.255.255     1              
        255.255.255.80/31   255.255.255.80   -  255.255.255.81      255.255.255.254     2              
        255.255.255.80/30   255.255.255.80   -  255.255.255.83      255.255.255.252     4              
        255.255.255.80/29   255.255.255.80   -  255.255.255.87      255.255.255.248     8              
        255.255.255.80/28   255.255.255.80   -  255.255.255.95      255.255.255.240     16             
        255.255.255.64/27   255.255.255.64   -  255.255.255.95      255.255.255.224     32             
        255.255.255.64/26   255.255.255.64   -  255.255.255.127     255.255.255.192     64             
        255.255.255.0/25    255.255.255.0    -  255.255.255.127     255.255.255.128     128            
        255.255.255.0/24    255.255.255.0    -  255.255.255.255     255.255.255.0       256            
        255.255.254.0/23    255.255.254.0    -  255.255.255.255     255.255.254.0       512            
        255.255.252.0/22    255.255.252.0    -  255.255.255.255     255.255.252.0       1024           
        255.255.248.0/21    255.255.248.0    -  255.255.255.255     255.255.248.0       2048           
        255.255.240.0/20    255.255.240.0    -  255.255.255.255     255.255.240.0       4096           
        255.255.224.0/19    255.255.224.0    -  255.255.255.255     255.255.224.0       8192           
        255.255.192.0/18    255.255.192.0    -  255.255.255.255     255.255.192.0       16384          
        255.255.128.0/17    255.255.128.0    -  255.255.255.255     255.255.128.0       32768          
        255.255.0.0/16      255.255.0.0      -  255.255.255.255     255.255.0.0         65536          
        255.254.0.0/15      255.254.0.0      -  255.255.255.255     255.254.0.0         131072         
        255.252.0.0/14      255.252.0.0      -  255.255.255.255     255.252.0.0         262144         
        255.248.0.0/13      255.248.0.0      -  255.255.255.255     255.248.0.0         524288         
        255.240.0.0/12      255.240.0.0      -  255.255.255.255     255.240.0.0         1048576        
        255.224.0.0/11      255.224.0.0      -  255.255.255.255     255.224.0.0         2097152        
        255.192.0.0/10      255.192.0.0      -  255.255.255.255     255.192.0.0         4194304        
        255.128.0.0/9       255.128.0.0      -  255.255.255.255     255.128.0.0         8388608        
        255.0.0.0/8         255.0.0.0        -  255.255.255.255     255.0.0.0           16777216       
        254.0.0.0/7         254.0.0.0        -  255.255.255.255     254.0.0.0           33554432       
        252.0.0.0/6         252.0.0.0        -  255.255.255.255     252.0.0.0           67108864       
        248.0.0.0/5         248.0.0.0        -  255.255.255.255     248.0.0.0           134217728      
        240.0.0.0/4         240.0.0.0        -  255.255.255.255     240.0.0.0           268435456      
        224.0.0.0/3         224.0.0.0        -  255.255.255.255     224.0.0.0           536870912      
        192.0.0.0/2         192.0.0.0        -  255.255.255.255     192.0.0.0           1073741824     
        128.0.0.0/1         128.0.0.0        -  255.255.255.255     128.0.0.0           2147483648