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IsIPv6
Last update:
May 18, 2026
Description
Determines whether the host supports IPv6.
Returns
True if the host supports IPv6.
Category
Syntax
IsIPv6(hostname)Parameters
| Parameter | Description |
hostname | IP address to check. |
See also
History
ColdFusion 9: Added this function
Usage
When you use this function to verify if the remote host supports IPv6, pass the hostname and not the IP address.This function applies only if the server that places the request is IPv6-enabled.
The following example checks whether the localhost supports IPv6:
Example
<cfset hostname="localhost">
<cfset test=IsIPv6()>
<cfif test>
<cfoutput>localhost supports IPv6</cfoutput>
</cfif>The following example checks whether the remote host supports IPv6:
<cfset hostname="remote hostname">
<cfset test=IsIPv6(hostname)>
<cfif test>
<cfoutput>#hostname# supports IPv6</cfoutput>
</cfif>
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