More detailsNeighboring subnets, wildcard mask, hex, reverse DNS, and binary breakdown
Neighboring /10 subnets
- Wildcard mask
- Used in Cisco ACLs and OSPF
- CIDR notation
- IP in hexadecimal
- IP as 32-bit integer
- Reverse DNS (PTR)
- Host bits / subnet bits
Binary breakdown
IP address
00001010.00000000.00000000.00000000Subnet mask
11111111.11000000.00000000.00000000Network
00001010.00000000.00000000.00000000Broadcast
00001010.00111111.11111111.11111111Quick facts for /10
- Subnet mask: 255.192.0.0
- Wildcard: 0.63.255.255
- Usable hosts: 4,194,302
- Total addresses: 4,194,304
/10 reference guideBit split, overview, sizing tables, notable networks, and FAQ
Binary bit split
11111111·11000000·00000000·00000000
Network bits (10)Host bits (22)
- Network bits
- 10
- Host bits
- 22
- Subnet mask
- 255.192.0.0
- Wildcard mask
- 0.63.255.255
- Total addresses
- 4,194,304
- Usable hosts
- 4,194,302
- Hosts formula
- 2^22 − 2
- /24 relationship
- 16,384 × /24 networks
Overview
A /10 block contains 4,194,304 addresses. Often used when dividing a /8 private range into regional segments for large enterprises or cloud providers.
Common use cases
- Regional division of a large private /8 block
- Cloud provider availability region addressing
- Large university or hospital campus networks
Subnet sizing reference
Notable /10 networks
100.64.0.0/10Carrier-Grade NAT (RFC 6598)
Frequently asked questions
Common questions about /10 networks, subnet masks, and use cases.