# /26 Subnet Mask (255.255.255.192) – Hosts, Range & FAQ > The /26 subnet mask is 255.255.255.192. A /26 block holds 64 addresses with 62 usable hosts — ranges, wildcard, binary math and FAQs. - Page URL: https://itinsighthub.com/subnet/26/ - Markdown variant of this page: append `?format=md` to any URL on this site or send `Accept: text/markdown`. - Full site index for AI assistants: https://itinsighthub.com/llms.txt - Full site export: https://itinsighthub.com/llms-full.txt # /26 Subnet Mask ReferenceIPv4 Four equal pieces per /24: mask 255.255.255.192, sixty-four addresses, sixty-two usable. The /26 is the branch-office staple, big enough for staff, printers, and phones yet cheap enough to hand out freely. The /26 subnet mask is 255.255.255.192, equivalent to 0.0.0.63 as a wildcard. A /26 block contains 64 IP addresses (62 usable hosts). ## /26 facts at a glance - **Subnet mask:** 255.255.255.192 - **Wildcard mask:** 0.0.0.63 - **Binary mask:** 11111111.11111111.11111111.11000000 - **Total addresses:** 64 - **Usable hosts:** 62 (excludes network & broadcast) - **Block size:** 64 addresses (26) - **Typical role:** Subnets, VLANs and WAN links ## Example /26 networks Three consecutive /26 blocks, starting at the /26 boundary that contains 198.51.100.0: | Network | Usable range | Usable hosts | | --- | --- | --- | | 198.51.100.0/26 | 198.51.100.1 – 198.51.100.62 | 62 | | 198.51.100.64/26 | 198.51.100.65 – 198.51.100.126 | 62 | | 198.51.100.128/26 | 198.51.100.129 – 198.51.100.190 | 62 | ## How to calculate a /26 mask A /26 mask sets the first 26 bits of a 32-bit number to 1 and leaves the remaining 6 bits as 0. In binary that reads `11111111.11111111.11111111.11000000`, which converts to dotted decimal `255.255.255.192`. Each block covers a contiguous run of 26 = 64 addresses, and every block starts at a multiple of that size. The wildcard simply flips every bit, giving `0.0.0.63`. ## Where /26 is used - Branch sites carved from a headquarters /16 or /24 pool. - Separate voice and data VLANs on the same floor switch stack. - Small server pods where sixty-two addresses are plenty. Boundaries land at .0, .64, .128, and .192; their host ranges run .1-.62, .65-.126, .129-.190, and .193-.254 respectively. Wildcard mask 0.0.0.63 is what you type into Cisco-style ACLs to match a whole /26. ## Frequently asked questions **How many usable hosts are in a /26?** 62 of 64 total addresses. **What is the subnet mask for a /26?** 255.255.255.192, wildcard 0.0.0.63: two borrowed bits from the fourth octet create four subnets. **How many /26s fit in a /24?** Four, starting at .0, .64, .128, and .192. **What range does 192.168.1.64/26 cover?** Addresses 192.168.1.64 through 192.168.1.127, with .65-.126 available for hosts, .64 as the network, and .127 as broadcast. ## Open this block in a calculator [Open the /26 block in the subnet calculator](https://itinsighthub.com/subnet-calculator/?q=198.51.100.0%2F26) [Get the /26 wildcard mask →](https://itinsighthub.com/wildcard-mask-calculator/?q=%2F26) ### Related prefixes [/24](https://itinsighthub.com/subnet/24/)[/25](https://itinsighthub.com/subnet/25/)[/27](https://itinsighthub.com/subnet/27/)[/28](https://itinsighthub.com/subnet/28/)[/30](https://itinsighthub.com/subnet/30/) ← /25 subnet mask /27 subnet mask → --- © 2026 ITInsightHub · [About](https://itinsighthub.com/about/) · [Contact](https://itinsighthub.com/contact/) · [Privacy](https://itinsighthub.com/privacy/)