IPv4 to IPv6 Converter
Representations only: this does not assign addresses, enable IPv6, query DNS or prove routability. All valid IPv4 values are accepted, including private, reserved, multicast and broadcast values.
Representations only: this does not assign addresses, enable IPv6, query DNS or prove routability. All valid IPv4 values are accepted, including private, reserved, multicast and broadcast values.
Enter one address and convert.
Mapped IPv6 may use a dotted tail or equivalent hexadecimal. Arbitrary IPv6, IPv4-compatible addresses, NAT64 and 6to4 input are not converted back to IPv4. Hex compression removes the longest run of at least two zero groups and uses the first run on a tie.
6to4 is shown for historical representation only, not as a deployment recommendation. RFC 7526 deprecates 6to4 anycast relay operation. Reserved or private IPv4 values may produce a mathematical prefix without any usable route. RFC 7526
Inputs stay in this page; nothing is uploaded or stored. The ip6.arpa output is a name, not an existing PTR record or a DNS lookup.
A QUICK WALKTHROUGH
How to use this tool
- Choose the direction and enter one plain address.
- Convert and review mapped, full hex, compressed hex, historical prefix and reverse-DNS forms.
- Copy the results if needed; consult your actual network configuration before using an address.
RFC 5952 compressed hexadecimal
Mapped IPv6 may use a dotted tail or equivalent hexadecimal. Arbitrary IPv6, IPv4-compatible addresses, NAT64 and 6to4 input are not converted back to IPv4. Hex compression removes the longest run of at least two zero groups and uses the first run on a tie.
Historical 6to4 /48 prefix
6to4 is shown for historical representation only, not as a deployment recommendation. RFC 7526 deprecates 6to4 anycast relay operation. Reserved or private IPv4 values may produce a mathematical prefix without any usable route.
Mapped IPv6 reverse-DNS name (32 nibbles)
Inputs stay in this page; nothing is uploaded or stored. The ip6.arpa output is a name, not an existing PTR record or a DNS lookup.
GOOD TO KNOW
Common questions
Can any IPv6 address be converted to IPv4?
No. Only the IPv4-mapped range ::ffff:0:0/96 can be reversed. No address-class or routability filter is applied to the embedded IPv4.