Domain registrar
A domain registrar provides registration services that let a registrant register and manage a domain name with the relevant domain registry.
Registration and DNS are different jobs
The registrar handles the domain registration relationship, including operations such as renewal and transfer. The registry maintains registrations for a top-level domain. A DNS provider hosts the records used to find services. One company may provide several of these services, but the responsibilities remain different.
That distinction matters during an urgent change request. Moving a registration to another registrar, changing nameservers, and editing a mail-routing record are different operations. They may involve different accounts and approvers.
Our registrar-change article explains how to identify which operation is actually being requested.
A transfer lock has a specific purpose
ICANN defines clientTransferProhibited as a restriction on transfers to another registrar. It lists update restrictions separately. A transfer lock does not, by itself, establish that nobody can edit records at the DNS provider.
Keep the registration owner, DNS owner, recovery route, and backup approver identifiable. If a request claims that a vendor urgently needs a change, verify it through an established contact route. The callback guide explains why a number supplied in the disputed request is not independent verification.
After a change, confirm the registration state with the registrar and check the affected records with the DNS provider. Those checks answer different questions.