10.0.0.0/16 (Common VPC / LAN Range)
PrivateRFC 1918
10.0.0.0/16 at a glance
| CIDR block | 10.0.0.0/16 |
|---|---|
| First address | 10.0.0.0 |
| Last address | 10.0.255.255 |
| Total addresses | 65,536 |
| Subnet mask | 255.255.0.0 |
| Prefix length | /16 |
| Type | Private |
| Publicly routable | No |
| Defined in | RFC 1918 |
Open in CIDR calculator/16 subnet details
What is 10.0.0.0/16 used for?
10.0.0.0/16 is a popular choice for a cloud VPC or a whole office network, giving 65,536 addresses inside the private 10.0.0.0/8 range. It is usually split into /24 or /20 subnets. Using it everywhere makes VPC peering and VPNs harder, because peered networks cannot overlap.
Common subnets of 10.0.0.0/16
Overlaps and conflicts
- Inside 10.0.0.0/8
- Contains 10.0.0.0/24
FAQ
How many /24 subnets are in 10.0.0.0/16?
256, from 10.0.0.0/24 to 10.0.255.0/24.
Should I use 10.0.0.0/16 for my VPC?
It works, but it is the most common choice, so it often overlaps with other VPCs or on-premises networks you later need to peer or connect by VPN. Picking a less common block, such as 10.42.0.0/16, avoids that.