I changed the ip address of the glue records at my domain registrar (Moniker). But still the name servers are pointing to the old server. How can I verify that the updation was successful?
I tried dig NS mydomain.com @a.gtld-servers.net.
and it returned the old IP address. All the root name servers are returning the old ip address.
Your check is ok. Moniker did not submit your new record to the TLD. Check with moniker, since .com TLD should update glue records in 5 minutes at most.