Here is the networking side of it:

IsIP(IPAddress as String)
  IPAddress: A String with an IP address in it.
  Returns: True or False

IsSubnet(SubnetMask as String)
  SubnetMask: Takes a string with a valid SubnetMask or CIDR Notation.
  Returns: True or False

CIDRtoSubnet(CIDRNotation as String)
  CIDRNotation: A string with a valid CIDR notation.
  Returns: Returns a SubnetMask, or false if invalid.

GetIPRanges(NetworkAddress as String)
  NetworkAddress: Takes a string with a valid IP address and SubnetMask.
  Returns: An array with the beginning and ending IP address range. Returns false if its invalid.

IsInIPRange(IPAddress as String, SubnetMask as String, IPtoCheck as String)
  IPAddress: String with a valid IP address.
  SubnetMask: String with a valid IP address.
  IPtoCheck: String of the IP address to check.
  Returns: True or False

IPIncrement(IPAddress as String, Increment as Double, Optional SubnetMask as String)
  IPAddress: A String with a valid IP address.
  Increment: A positive numeric value to increase the IP address.
  SubnetMask (optional): To check if the incremented IP address is in a valid network range.
  Returns: Returns a valid IP address. (Returns False if SubnetMask is used and the IP address is out of range.)