How To Subnet A Class C IP Address Block
|
Mask |
Subnets |
IP Addresses Per Subnet |
Bitwise Designation |
|
255.255.255.128 |
2 |
128 |
/25 |
|
255.255.255.192 |
4 |
64 |
/26 |
|
255.255.255.224 |
8 |
32 |
/27 |
|
255.255.255.240 |
16 |
16 |
/28 |
|
255.255.255.248 |
32 |
8 |
/29 |
|
255.255.255.252 |
64 |
4 |
/30 |
Mask & IP Address Ranges255.255.255.128:
255.255.255.192:
- 0-63, 64-127, 128-191, 192-256
255.255.255.224:
- 0-31, 32-63, 64-95, 96-127, 128-159, 160-191, 192-223, 224-255
255.255.255.240:
- 0-15, 16-31, 32-47, 48-63, 64-79, 80-95, 96-111, 112-127, 128-143, 144-159, 160-175, 176-191, 192-207, 208-223, 224-239, 240-255
255.255.255.248:
- 0-7, 8-15, 16-23, 24-31, 32-39, 40-47, 48-55, 56-63, 64-71, 72-79, 80-87, 88-95, 96-103, 104-111, 112-119, 120-127, 128-135, 136-143, 144-151, 152-159, 160-167, 168-175, 176-183, 184-191, 192-199, 200-207, 208-215, 216-223, 224-231, 232-239, 240-247, 248-255
255.255.255.252:
- 0-3, 4-7, 8-11, 12-15, 16-19, 20-23, 24-27, 28-31, 32-35, 36-39, 40-43, 44-47, 48-51, 52-55, 56-59, 60-63, 64-67, 68-71, 72-75, 76-79, 80-83, 84-87, 88-92, 92-95, 96-99, 100-103, 104-107, 108-111, 112-115, 116-119, 120-123, 124-127, 128-131, 132-135, 136-139, 140-143, 144-147, 148-151, 152-155, 156-159, 160-163, 164-167, 167-171, 172-175, 176-179, 180-183, 184-187, 188-191, 192-195, 196-199, 200-203, 204-207, 208-211, 212-215, 216-219, 220-223, 224-227, 228-231, 232-235, 236-239, 240-243, 244-247, 248-251, 252-255
Private IP Address RangesRFC1918 Ranges:
- Class A: 10.0.0.0 – 10.255.255.255 (10/8 prefix)
- Class B: 172.16.0.0 – 172.31.255.255 (172.16/12 prefix)
- Class C: 192.168.0.0 – 192.168.255.255 (192.168/16 prefix)
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