More detailsNeighboring subnets, expanded address, reverse DNS, and hextet breakdown
Neighboring /60 subnets
- Expanded address
- Compressed address
- Network (expanded)
- Last address (expanded)
- Prefix mask
- Total addresses (exact)
- Reverse DNS (PTR)
- Host bits / network bits
Hextet breakdown
Quick facts for IPv6 /60
- Prefix mask: ffff:ffff:ffff:fff0::
- Total addresses: 2⁶⁸
- Approx. count: 2.95 × 10²⁰
- /64 subnets: 2⁴
IPv6 /60 reference guideBit split, overview, key facts, sizing tables, design notes, standards, and FAQ
Network / host bit split
- Network bits
- 60
- Host bits
- 68
- Prefix mask
- ffff:ffff:ffff:fff0::
- Total addresses
- 2⁶⁸
- Approx. count
- 2.95 × 10²⁰
- /64 subnets
- 2⁴
- Addresses formula
- 2^68
- /64 relationship
- 2⁴ × /64 subnets
Overview
A /60 provides exactly 16 /64 subnets (2⁶⁸ addresses). Some ISPs delegate a /60 to home users as a smaller alternative to a /56. It is the smallest delegation that still lets you run several separate /64 LANs.
Common use cases
- Compact home prefix delegation
- Small deployments needing a few VLANs
Key facts
- A /60 fixes 60 network bits and leaves 68 host bits — 2⁶⁸ total addresses.
- In network design terms, /60 is typically a home or small-office prefix delegation.
- You can subnet a /60 into 2⁴ /64 LANs.
- Residential ISPs often delegate /56 or /60; /60 would provide 2⁴ home LANs.
Design guidance
A /60 is a common ISP prefix-delegation size for homes and small offices. Configure your edge router to receive the delegated prefix via DHCPv6-PD, then statically route or assign /64 subnets to each internal interface. Even a /60 provides 2⁴ /64 LANs — far more than most households need.
Practical example
Suppose your ISP delegates 2001:db8:abcd:0012::/60 to your edge router. You could assign 2001:db8:abcd:0012::/64 to your main LAN, 2001:db8:abcd:0013::/64 to guest Wi-Fi, and 2001:db8:abcd:0014::/64 to IoT — using only 3 of the 2⁴ available /64 subnets.
Related RFCs and standards
- RFC 4291IPv6 Addressing Architecture
- RFC 6177IPv6 Address Assignment to End Sites
- RFC 3633IPv6 Prefix Options for DHCPv6 Prefix Delegation
Prefix sizing reference
Frequently asked questions
Common questions about IPv6 /60 blocks, prefix sizes, and use cases.