I can not access our work’s website from work

[zillah]

Now my question if I want to update the works.org.nl forward lookup zone to the actual external IP (that I found from home via ping 202.y.y.y) do I need to update all entries (i.e. www, fto, list) ?

vertices what I did ,,,,at home when I pinged www.works.org.nl (again I made this name up as an example), I got an external ip address (202.y.y.y)

At work under works.org.nl forward lookup zone I updated 3 entries for ftp, list, www from the old ip address to the new one (i.e. 202.y.y.y) and now I can access www.works.org.nl from work and I can ping www.works.org.nl from work as well

Would I have done the right thing or still I need to consider other thing in the DNS configuration ?

Still I am looking for the answer to below :

If the actual external IP for the website is changed in few months later do I need to update works.org.nl forward lookup zone again ?

Thanks