My domain is findfor.com registered with networksolutions.com,

Now I am trying to change the name server but I have to enter the NIC Handle.

What is this NiC Handle? and how to create or find it?

You did click on help at NetSol, eh?

NIC Handle:
A NIC Handle is a unique identifier, which can be up to 10 alpha-numeric characters, assigned to each domain name record, contact record, and network record in Network Solutions' domain name database. NIC handles should be used on registration forms whenever possible, as they save time and help to ensure accuracy in the records.

The Admin NIC Handle for your domain is: AKI64
The Registrant NIC Handle for your domain is: FINDFOR2-DOM

Are you dealing with your NIC handle or the Domain NIC handle there is a difference? If you are submitting a new DNS there will be no NIC handle yet...I seem to remember that in that case you are directed to leave the NIC handle for the domain blank.

All the best!

To clarify my earlier post...I am talking about if you are establishing and registering for the first time a NEW DNS name and IP not moving to an established DNS name.