IPv6 Cheat Sheet

Need a quick guide for IPv6 subnetting? IP Market’s IPv6 Cheat Sheet covers CIDR sizes, address counts, and more—plus, learn how IPv4 leasing can help during your transition.

CIDR	Mask	Total	Example
/16	ffff::	2^112 (5.2 septillion)	2001::/16
/24	ffff:ff00::	2^104 (20 quadrillion)	2001:db8::/24
/32	ffff:ffff::	2^96 (79 quintillion)	2001:db8::/32
/40	ffff:ffff:ff00::	2^88 (309 quadrillion)	2001:db8:abcd::/40
/48	ffff:ffff:ffff::	2^80 (1.2 quintillion)	2001:db8:abcd::/48
/52	ffff:ffff:ffff:f000::	2^76 (77 trillion)	2001:db8:abcd:1::/52
/56	ffff:ffff:ffff:ff00::	2^72 (4.7 trillion)	2001:db8:abcd:1200::/56
/64	ffff:ffff:ffff:ffff::	2^64 (18 quintillion)	2001:db8:abcd:1234::/64
/96	ffff:ffff:ffff:ffff:ffff:ffff::	2^32 (4.3 billion)	2001:db8:abcd:1234:5678:9abc::/96
/112	ffff:ffff:ffff:ffff:ffff:ffff:ff00::	2^16 (65,536)	2001:db8:abcd:1234:5678:9abc:de00::/112
/128	ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff	1	2001:db8:abcd:1234:5678:9abc:def0:1234/128

About the IPv6 Cheat Sheet

This IPv6 Cheat Sheet is your go-to for understanding CIDR sizes and subnetting in IPv6. It’s perfect for planning networks or transitioning from IPv4, with all the key numbers laid out. And if you’re still bridging the gap, IP Market’s IPv4 leasing can help—let’s get started!

About the IPv6 Cheat Sheet

The IPv6 Cheat Sheet is here for anyone diving into IPv6 networks—whether you’re a network admin, a student, or a business prepping for the future. IPv6 uses a 128-bit address space (think 2001:db8::1), giving you a ton more addresses than IPv4’s 32-bit limit. CIDR (Classless Inter-Domain Routing) in IPv6 helps you split that huge space into manageable subnets, but the numbers can feel wild compared to IPv4. This cheat sheet breaks it down: subnet sizes, address counts, and examples for each CIDR. Plus, we’ll show how IP Market’s IPv4 leasing can ease your transition while you get IPv6 up and running.

How to Use It

Using this IPv6 Cheat Sheet is pretty straightforward. First, figure out your network needs—most setups use a /64 for a LAN, giving you 18 quintillion addresses (plenty for auto-configuration). If you’re an ISP or large org, you might start with a /32 or /48 and subnet down. Check the CIDR to see how many addresses you’re working with, then use the example as a guide for your addressing scheme. IPv6’s big numbers mean you rarely run out, but if you’re still using IPv4 in a dual-stack setup, IP Market can help—more on that next. This cheat sheet is your starting point to plan and transition with confidence.

IPv4 Leasing with IP Market for Transition

Still relying on IPv4 while you roll out IPv6? IP Market’s got your back with easy IPv4 leasing. Our marketplace at ipmarket.io offers prefixes in all sizes—like the /24 or /16 you might already know from IPv4 subnetting—ready to lease with flexible terms. Go short-term for a quick bridge or long-term while you transition to IPv6. Every deal is secure with encrypted transactions and verified sellers, and our pricing is upfront with no hidden fees. Need a /24 to keep your network running? We’ve got plenty. Browse our listings, lease what you need, and make the IPv6 switch on your terms—it’s a smart way to keep things running smoothly.

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