CFLib.org – Common Function Library Project

Description:
Converts an IP address to a network class.

Return Values:
Returns a string.

Example:

<cfset varip = "192.168.0.1">
<cfset varclass = ipclass("192.168.0.1")>
<cfoutput>
	IP: #varip#<br />
	Class: #varclass#<br />
</cfoutput>

Parameters:

Full UDF Source:

<cfscript>
/**
 * Converts an IP address to a network class.
 * 
 * @param ip 	 IP address. (Required)
 * @return Returns a string. 
 * @author del usr (&#100;&#101;&#108;&#117;&#115;&#114;&#101;&#120;&#112;&#101;&#114;&#116;&#64;&#104;&#111;&#116;&#109;&#97;&#105;&#108;&#46;&#99;&#111;&#109;) 
 * @version 1, February 14, 2004 
 */
function IPclass(ip) {
	var myint = listFirst(ip, ".");
	if (myint GTE 1 and myint LTE 127) return "Class A";
	if (myint GTE 128 and myint LTE 191) return "Class B";
	if (myint GTE 192 and myint LTE 223) return "Class C";
	if (myint GTE 224 and myint LTE 239) return "Class D";
	if (myint GTE 240 and myint LTE 255) return "Class E";
}
</cfscript>