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

Decimal IP Address:	2886728512	( http://2886728512 )
IP Address:	172.15.251.64/30	( 0xAC0FFB40 )
Subnet Mask:	255.255.255.252	( 0xFFFFFFFC )
Wildcard (Inverse) Mask:	0.0.0.3	( 0x00000003 )
Network Address:	172.15.251.64	( 0xAC0FFB40 )
Broadcast Address:	172.15.251.67	( 0xAC0FFB43 )
Binary IP Address:	10101100.00001111.11111011.01000000
Binary Subnet Mask:	11111111.11111111.11111111.11111100
AND
Binary Network Address:	10101100.00001111.11111011.01000000
Binary Broadcast Address:	10101100.00001111.11111011.01000011
Class of Address:	B
Number of Subnets:	16384
Number of IP:	4
Number of Useable Hosts:	2
in-addr.arpa format:	64.251.15.172.in-addr.arpa
Hostname:	172-15-251-64.lightspeed.irvnca.sbcglobal.net
GEOIP Location:	US - United States
NAT64 Address:	64:FF9B::AC0F:FB40
ISATAP Address:	FE80::0200:5EFE:AC0F:FB40
mapped IPV4:	::ffff:AC0F:FB40::/48
6to4:	2002:AC0F:FB40::/48

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Subnet  Network             First Usable IP     Last Usable IP      Broadcast
0       172.15.251.0        172.15.251.1        172.15.251.2        172.15.251.3        
1       172.15.251.4        172.15.251.5        172.15.251.6        172.15.251.7        
2       172.15.251.8        172.15.251.9        172.15.251.10       172.15.251.11       
3       172.15.251.12       172.15.251.13       172.15.251.14       172.15.251.15       
4       172.15.251.16       172.15.251.17       172.15.251.18       172.15.251.19       
5       172.15.251.20       172.15.251.21       172.15.251.22       172.15.251.23       
6       172.15.251.24       172.15.251.25       172.15.251.26       172.15.251.27       
7       172.15.251.28       172.15.251.29       172.15.251.30       172.15.251.31       
8       172.15.251.32       172.15.251.33       172.15.251.34       172.15.251.35       
9       172.15.251.36       172.15.251.37       172.15.251.38       172.15.251.39       
10      172.15.251.40       172.15.251.41       172.15.251.42       172.15.251.43       
11      172.15.251.44       172.15.251.45       172.15.251.46       172.15.251.47       
12      172.15.251.48       172.15.251.49       172.15.251.50       172.15.251.51       
13      172.15.251.52       172.15.251.53       172.15.251.54       172.15.251.55       
14      172.15.251.56       172.15.251.57       172.15.251.58       172.15.251.59       
15      172.15.251.60       172.15.251.61       172.15.251.62       172.15.251.63       
16      172.15.251.64       172.15.251.65       172.15.251.66       172.15.251.67       
17      172.15.251.68       172.15.251.69       172.15.251.70       172.15.251.71       
18      172.15.251.72       172.15.251.73       172.15.251.74       172.15.251.75       
19      172.15.251.76       172.15.251.77       172.15.251.78       172.15.251.79       
20      172.15.251.80       172.15.251.81       172.15.251.82       172.15.251.83       
21      172.15.251.84       172.15.251.85       172.15.251.86       172.15.251.87       
22      172.15.251.88       172.15.251.89       172.15.251.90       172.15.251.91       
23      172.15.251.92       172.15.251.93       172.15.251.94       172.15.251.95       
24      172.15.251.96       172.15.251.97       172.15.251.98       172.15.251.99       
25      172.15.251.100      172.15.251.101      172.15.251.102      172.15.251.103      
26      172.15.251.104      172.15.251.105      172.15.251.106      172.15.251.107      
27      172.15.251.108      172.15.251.109      172.15.251.110      172.15.251.111      
28      172.15.251.112      172.15.251.113      172.15.251.114      172.15.251.115      
29      172.15.251.116      172.15.251.117      172.15.251.118      172.15.251.119      
30      172.15.251.120      172.15.251.121      172.15.251.122      172.15.251.123      
31      172.15.251.124      172.15.251.125      172.15.251.126      172.15.251.127      
32      172.15.251.128      172.15.251.129      172.15.251.130      172.15.251.131      
33      172.15.251.132      172.15.251.133      172.15.251.134      172.15.251.135      
34      172.15.251.136      172.15.251.137      172.15.251.138      172.15.251.139      
35      172.15.251.140      172.15.251.141      172.15.251.142      172.15.251.143      
36      172.15.251.144      172.15.251.145      172.15.251.146      172.15.251.147      
37      172.15.251.148      172.15.251.149      172.15.251.150      172.15.251.151      
38      172.15.251.152      172.15.251.153      172.15.251.154      172.15.251.155      
39      172.15.251.156      172.15.251.157      172.15.251.158      172.15.251.159      
40      172.15.251.160      172.15.251.161      172.15.251.162      172.15.251.163      
41      172.15.251.164      172.15.251.165      172.15.251.166      172.15.251.167      
42      172.15.251.168      172.15.251.169      172.15.251.170      172.15.251.171      
43      172.15.251.172      172.15.251.173      172.15.251.174      172.15.251.175      
44      172.15.251.176      172.15.251.177      172.15.251.178      172.15.251.179      
45      172.15.251.180      172.15.251.181      172.15.251.182      172.15.251.183      
46      172.15.251.184      172.15.251.185      172.15.251.186      172.15.251.187      
47      172.15.251.188      172.15.251.189      172.15.251.190      172.15.251.191      
48      172.15.251.192      172.15.251.193      172.15.251.194      172.15.251.195      
49      172.15.251.196      172.15.251.197      172.15.251.198      172.15.251.199      
50      172.15.251.200      172.15.251.201      172.15.251.202      172.15.251.203      
51      172.15.251.204      172.15.251.205      172.15.251.206      172.15.251.207      
52      172.15.251.208      172.15.251.209      172.15.251.210      172.15.251.211      
53      172.15.251.212      172.15.251.213      172.15.251.214      172.15.251.215      
54      172.15.251.216      172.15.251.217      172.15.251.218      172.15.251.219      
55      172.15.251.220      172.15.251.221      172.15.251.222      172.15.251.223      
56      172.15.251.224      172.15.251.225      172.15.251.226      172.15.251.227      
57      172.15.251.228      172.15.251.229      172.15.251.230      172.15.251.231      
58      172.15.251.232      172.15.251.233      172.15.251.234      172.15.251.235      
59      172.15.251.236      172.15.251.237      172.15.251.238      172.15.251.239      
60      172.15.251.240      172.15.251.241      172.15.251.242      172.15.251.243      
61      172.15.251.244      172.15.251.245      172.15.251.246      172.15.251.247      
62      172.15.251.248      172.15.251.249      172.15.251.250      172.15.251.251      
63      172.15.251.252      172.15.251.253      172.15.251.254      172.15.251.255      


Next>


        CIDR Block          Network             Broadcast           Subnet Mask         No. IP's
        172.15.251.64/32    172.15.251.64    -  172.15.251.64       255.255.255.255     1              
        172.15.251.64/31    172.15.251.64    -  172.15.251.65       255.255.255.254     2              
        172.15.251.64/30    172.15.251.64    -  172.15.251.67       255.255.255.252     4              
        172.15.251.64/29    172.15.251.64    -  172.15.251.71       255.255.255.248     8              
        172.15.251.64/28    172.15.251.64    -  172.15.251.79       255.255.255.240     16             
        172.15.251.64/27    172.15.251.64    -  172.15.251.95       255.255.255.224     32             
        172.15.251.64/26    172.15.251.64    -  172.15.251.127      255.255.255.192     64             
        172.15.251.0/25     172.15.251.0     -  172.15.251.127      255.255.255.128     128            
        172.15.251.0/24     172.15.251.0     -  172.15.251.255      255.255.255.0       256            
        172.15.250.0/23     172.15.250.0     -  172.15.251.255      255.255.254.0       512            
        172.15.248.0/22     172.15.248.0     -  172.15.251.255      255.255.252.0       1024           
        172.15.248.0/21     172.15.248.0     -  172.15.255.255      255.255.248.0       2048           
        172.15.240.0/20     172.15.240.0     -  172.15.255.255      255.255.240.0       4096           
        172.15.224.0/19     172.15.224.0     -  172.15.255.255      255.255.224.0       8192           
        172.15.192.0/18     172.15.192.0     -  172.15.255.255      255.255.192.0       16384          
        172.15.128.0/17     172.15.128.0     -  172.15.255.255      255.255.128.0       32768          
        172.15.0.0/16       172.15.0.0       -  172.15.255.255      255.255.0.0         65536          
        172.14.0.0/15       172.14.0.0       -  172.15.255.255      255.254.0.0         131072         
        172.12.0.0/14       172.12.0.0       -  172.15.255.255      255.252.0.0         262144         
        172.8.0.0/13        172.8.0.0        -  172.15.255.255      255.248.0.0         524288         
        172.0.0.0/12        172.0.0.0        -  172.15.255.255      255.240.0.0         1048576        
        172.0.0.0/11        172.0.0.0        -  172.31.255.255      255.224.0.0         2097152        
        172.0.0.0/10        172.0.0.0        -  172.63.255.255      255.192.0.0         4194304        
        172.0.0.0/9         172.0.0.0        -  172.127.255.255     255.128.0.0         8388608        
        172.0.0.0/8         172.0.0.0        -  172.255.255.255     255.0.0.0           16777216       
        172.0.0.0/7         172.0.0.0        -  173.255.255.255     254.0.0.0           33554432       
        172.0.0.0/6         172.0.0.0        -  175.255.255.255     252.0.0.0           67108864       
        168.0.0.0/5         168.0.0.0        -  175.255.255.255     248.0.0.0           134217728      
        160.0.0.0/4         160.0.0.0        -  175.255.255.255     240.0.0.0           268435456      
        160.0.0.0/3         160.0.0.0        -  191.255.255.255     224.0.0.0           536870912      
        128.0.0.0/2         128.0.0.0        -  191.255.255.255     192.0.0.0           1073741824     
        128.0.0.0/1         128.0.0.0        -  255.255.255.255     128.0.0.0           2147483648