How many addresses are in an IPv6 /14?

An IPv6 /14 contains 2¹¹⁴ addresses. The prefix fixes the first 14 bits; the remaining 114 bits identify individual addresses in the block.

How many /64 subnets fit in a /14?

A /14 can be divided into 2⁵⁰ standard /64 LAN subnets. Each /64 holds 2⁶⁴ addresses, so the combined block is effectively inexhaustible for normal use.

How many /48 site allocations are in a /14?

A /14 contains 2³⁴ /48 site allocations. A /48 is the classic size assigned to a business site or campus.

What is the difference between /14 and /15?

A /14 is twice as large as /15. /14 has 2¹¹⁴ addresses; /15 has 2¹¹³. Each step down the prefix number doubles the address count.

How does /14 compare to /13?

A /13 is twice as large as /14. Moving from /14 to /13 adds one more fixed network bit, halving the host portion from 2¹¹⁴ to 2¹¹⁵ addresses.

How do I calculate an IPv6 /14 subnet?

Enter an IPv6 address and select prefix /14 in the calculator above — or paste full CIDR notation like 2001:db8::/14. The tool instantly returns the network address, address range, prefix mask, reverse DNS, and total count of 2¹¹⁴ addresses.

IPv6 /14 Subnet Calculator

Results update as you type

A /14 block fixes the first 14 bits of the address, leaving 114 host bits and 2¹¹⁴ total addresses. It subdivides into about 2⁵⁰ /64 LAN subnets. That is also about 2³⁴ /48 site allocations. At the ISP tier, a /14 holds 2¹⁸ /32 ISP blocks. Prefixes in this range appear in BGP tables and RIR allocation policies as aggregation blocks above the standard ISP /32.

Prefix length

/128

/14 = 2¹¹⁴ addresses (≈ 2.08 × 10³⁴)

Results for 2000::/14

Documentation (RFC 3849)Global scope

Network / prefixThe first address — identifies the subnet itself

First addressSubnet-router anycast; first address in the block

Last addressThe highest address in this block

Prefix maskEquivalent to /14

Total addresses≈ 2.08 × 10³⁴ addresses

Address typeGlobally routable scope

More detailsNeighboring subnets, expanded address, reverse DNS, and hextet breakdown

Neighboring /14 subnets

Expanded address
Compressed address
Network (expanded)
Last address (expanded)
Prefix mask
Total addresses (exact)
Reverse DNS (PTR)
Host bits / network bits

Hextet breakdown

20010db8000000000000000000000000

NetworkSplit groupHost

Quick facts for IPv6 /14

Prefix mask: fffc::
Total addresses: 2¹¹⁴
Approx. count: 2.08 × 10³⁴
/64 subnets: 2⁵⁰

IPv6 /14 reference guideBit split, overview, key facts, sizing tables, design notes, standards, and FAQ

Network / host bit split

mixhosthosthosthosthosthosthost

Network bits (14)Split hextetHost bits (114)

Network bits: 14
Host bits: 114
Prefix mask: fffc::
Total addresses: 2¹¹⁴
Approx. count: 2.08 × 10³⁴
/64 subnets: 2⁵⁰
Addresses formula: 2^114
/64 relationship: 2⁵⁰ × /64 subnets

Overview

Common use cases

Aggregating ISP /32 allocations in routing tables
Regional provider address planning
Large-scale subnetting study and documentation

Key facts

A /14 fixes 14 network bits and leaves 114 host bits — 2¹¹⁴ total addresses.
In network design terms, /14 is typically a RIR-level aggregation block.
You can subnet a /14 into about 2⁵⁰ /64 LANs.
At site scale, /14 equals about 2³⁴ /48 allocations.
At ISP scale, /14 contains 2¹⁸ /32 blocks.

Design guidance

A /14 belongs in BGP aggregation and RIR allocation planning — not on a VLAN interface. If you are subnetting for a real deployment, work downward: carve /48 or /56 site blocks first, then assign one /64 per LAN. Announcing a single aggregated /14 (or larger) upstream keeps global routing tables manageable.

Practical example

An ISP holding 2001:db8::/14 might announce the entire /14 to upstream providers as one BGP route, then delegate /48 blocks such as 2001:db8:0001::/48 and 2001:db8:0002::/48 to business customers. Each customer subnets their /48 into /64 LANs.

Related RFCs and standards

RFC 4291IPv6 Addressing Architecture
RFC 3849IPv6 Documentation Address Prefix (2001:db8::/32)

Prefix sizing reference

Divide /14 into…

Prefix	Subnets	Addresses each
/15	2	2¹¹³
/16	4	2¹¹²
/18	16	2¹¹⁰
/22	256	2¹⁰⁶

/14 fits inside…

Supernet	Addresses	/14s inside
/13	2¹¹⁵	2
/12	2¹¹⁶	4
/10	2¹¹⁸	16
/6	2¹²²	256

Notable /14 networks

2001:db8::/32Documentation prefix (RFC 3849)

Frequently asked questions

Common questions about IPv6 /14 blocks, prefix sizes, and use cases.

Common IPv6 prefix sizes

/3 /12 /16 /20 /24 /28 /32 /36 /40 /44 /48 /52 /56 /60 /64 /80 /96 /112 /120 /124 /126 /127 /128