You are all correct of course and in an ideal world that would be possible. The link describing how to make use of CPAN is interesting reading but unfortunately there are situations when using code not part of a standard distribution is not viable.
I have coded what I need using nslookup and grep, split and substr.
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I will take a look at doing that. Only been using Perl for 3-4 weeks so not up to speed on how I'd achieve it but I found a decent guide on here.
But would be good to give something back given how much help I got with my first steps from this site.
However I will admit to being slightly cautious of CPAN. I understand and completely appreciate that sharing code is to the benefit of others but excessive duplicate modules or those that overlap in functionality cause huge amounts of grief for newcomers - as I found! I ended up in a CPAN fog rather than focusing on coding what I wanted with Perl.
I addition I feel it can make people lazy. The below code to achieve what I required is trivial and linking in another module wasteful - at least in my eyes. :)
For the moment though here is the code