I have 4 servers with theplanet and around 6 servers with other server companies

I have a question that i want to make single domain Name Server for all servers

like

ns1.mydomain.com and ns2.mydomain.com for server 1
ns3.mydomain.com and ns4.mydomain.com for server 2
ns5.mydomain.com and ns6.mydomain.com for server 3
ns7.mydomain.com and ns8.mydomain.com for server 4

mydomain.com is my single domain name

Now i have to reserve 10 domain names to run nameservers for 10 dedicated servers

Please provide me solution

anyone to answer this

Are you wanting to do the hosting from one of your servers or an existing service, such as ours?

Subdomains are fairly standard and should cover what you're wanting to do. Almost any DNS service, including ours, will allow you to setup subdomains.

As Tomy said, that's quite simple.
You can create your domain name in Orbit (or move it to Orbit) then create the sub-domain A records and register those as name-servers within orbit.

Also consider whether you want to run separate nameservers for each server, as you've outlined above, or whether you want to create a nameserver cluster. Cpanel for example makes this super-easy.

So
server1 runs ns1.mydomain.com
server2 runs ns2.mydomain.com
server3 runs ns3.mydomain.com

Optimally you want at least one other server running as a second dns server so that if one server goes down the dns is still up (so things like email will be retried instead of dropped, etc. Depending on the control panel, or no control panel, it can take a bit more time to set up a dns cluster, but it can be much easier in the longterm to manage if all your domains hosted at those servers just have to use ns1., ns2., and ns3. rather than having to have specific domains pointed to specific nameservers.