Change needed in A record of domain


New Member
I'm with IT for the City of Terrell TX. You appear to the DNS for the domain name TERRELLPL.ORG. This domain name points to the city library.
We recently changed the public IP address that points to the servers resolved by TERRELLPL.ORG
Since this domain was registered in 1999, 20 years ago, no one is left employed by the city that has any idea about this, not to mention any admin credentials.
I need to know how/what is needed for us to be able to change the A record in DNS to point to the correct IP address.
Any help would be appreciated as library patron can't get in to do the things they do.