CIDR /10Carrier-Grade NAT (RFC 6598)Carrier-Grade NAT (CGNAT RFC 6598)
100.64.0.0/10 Subnet Calculator & Range | ipcalc.net
Complete subnet breakdown for 100.64.0.0/10 (Carrier-Grade NAT (CGNAT RFC 6598)): Netmask 255.192.0.0, host range 100.64.0.1 - 100.127.255.254, usable hosts: 41,94,302.
Enter any notation: 192.168.1.1/24, 10.0.0.1 255.255.255.0, or plain IP
Subnet Mask Prefix: /10Netmask: 255.192.0.0
Presets:
32-Bit Subnet Boundary Visualizer
Click any bit position to adjust the CIDR prefix boundary
Network (10 bits)
Host (22 bits)
Octet 1100Mask: 255
11111111
Octet 264Mask: 192
11000000
Octet 30Mask: 0
00000000
Octet 40Mask: 0
00000000
Usable Hosts
4,194,302
Total IPs: 4,194,304
Network Address
100.64.0.0
Prefix: /10
Usable Host Range
100.64.0.1
100.127.255.254
Broadcast Address
100.127.255.255
Subnet Broadcast
Detailed Subnet Breakdown
Carrier-Grade NAT (RFC 6598)Subnet Mask
255.192.0.0
Wildcard Mask (Cisco ACL)
0.63.255.255
Hexadecimal IP / Mask
0x64400000 / 0xFFC00000
Integer / Decimal IP
1681915904
IP Class & Routing
Class A • Classless Inter-Domain Routing (CIDR)
Reverse DNS (in-addr.arpa)
0.0.64.100.in-addr.arpa
Cisco IOS Command Templates
ip address 100.64.0.0 255.192.0.0
access-list 1 permit 100.64.0.0 0.63.255.255
Technical Subnet Specifications
Prefix Length/10
Dotted Decimal Subnet Mask255.192.0.0
Wildcard Mask (Inverse)0.63.255.255
Total Available IP Addresses41,94,304
Usable Host Capacity41,94,302 hosts
Network Bits vs Host Bits10 Network / 22 Host
Binary Subnet Mask11111111.11000000.00000000.00000000
Cisco IOS Configuration
Copy-paste templates for Cisco router and switch interface setup:
! Configure Interface
interface GigabitEthernet0/0/1
ip address 100.64.0.1 255.192.0.0
no shutdown
! Access-Control List
access-list 10 permit 100.64.0.0 0.63.255.255
Tip: Wildcard mask is computed by inverting the subnet mask (
~mask).Typical Network Use Cases for /10
A /10 network block provides 41,94,304 total IP addresses with 41,94,302 usable host interfaces.
Designated Role: Subnet block.
Frequently Asked Questions: /10 (255.192.0.0)
Authoritative answers to common /10 subnetting, host capacity, and networking questions.
Q1How many usable hosts are in a /10 subnet?
A /10 subnet provides 41,94,302 usable host IP addresses out of 41,94,304 total addresses. In IPv4 networking, 2 addresses are reserved: the network address (100.64.0.0) and the directed broadcast address (100.127.255.255). Formula: 2^(32 - 10) - 2 = 41,94,302 usable hosts.
Q2What is the subnet mask and wildcard mask for /10?
The dotted-decimal subnet mask for a /10 prefix is 255.192.0.0. The corresponding wildcard mask (used in Cisco ACLs and OSPF network statements) is 0.63.255.255. In binary, the subnet mask consists of 10 network bits (1s) followed by 22 host bits (0s).
Q3What are the network, broadcast, and usable IP ranges for 100.64.0.0/10?
For the 100.64.0.0/10 subnet: the Network Address is 100.64.0.0, the Broadcast Address is 100.127.255.255, and the usable host range extends from 100.64.0.1 through 100.127.255.254. Any host interface configured in this subnet must have an IP within this range and netmask 255.192.0.0.
Q4What is a /10 subnet typically used for in network design?
A /10 subnet is typically deployed for subnet block. In enterprise and cloud environments (such as AWS VPCs or Azure VNets), /10 allocations provide the optimal balance between host capacity and address conservation.
Q5What does /10 mean in CIDR notation?
Classless Inter-Domain Routing (CIDR) notation expresses the subnet mask as a forward slash followed by the prefix length. A /10 prefix indicates that the first 10 bits of the 32-bit IPv4 address are locked for network identification, leaving the remaining 22 bits available for addressing host interfaces.