Networking
Remember it
Never forget the private IP ranges
Never forget the three private IPv4 ranges again.
Quick check · tap an answer to continue
Lesson notes
Key points
- Ten / 10.0.0.0/8: Ten unlocks 10.0.0.0 slash eight, the biggest private block for large enterprises.
- Sixteen / 172.16.0.0/12: Sixteen unlocks 172.16 slash twelve, running from 172.16 up to 172.31.
- Ninety-Two / 192.168.0.0/16: Ninety-two unlocks 192.168 slash sixteen, the range your home router uses.
Takeaway: Private: 10/8, 172.16/12, 192.168/16.
Quick check: What is the highest second octet in the 172 private range?
- 172.255
- 172.31
- 172.16
172.16.0.0/12 spans 172.16.0.0 to 172.31.255.255.
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