What DNS Actually Does
The Domain Name System, or DNS, is often described as the internet's phone book. It's the system that translates a human-readable domain name into the technical information computers need to find and connect to that domain — which mail server handles its email, which server hosts its website, and so on. A domain's DNS settings are organized into "records," and different record types hold different kinds of information.
Most business owners never think about DNS records directly — a web developer or hosting provider typically sets up the records that make a website and email work, and they're left alone from then on. But DNS settings live at your domain registrar or DNS host, under whatever account controls that domain, and they can be viewed and edited by anyone with access to that account.
What a TXT Record Is, and Why It's Used for Verification
A TXT record is simply a DNS record type that holds a piece of free-form text. Unlike the records that actually route your website traffic or email, a TXT record doesn't change how your domain functions — it just stores text that other systems can look up. Because TXT records are easy to add and don't risk breaking a live website or mailbox, they became a convenient, low-risk place for outside services to ask you to park a one-time "proof" string.
A verification TXT record typically looks like a long, randomly generated code provided by the service asking you to prove ownership — tools such as Google Search Console publish their own documentation describing exactly this process.
How the Verification Mechanism Works, Step by Step
- You sign up for a service that needs to confirm you control a domain — for example, Google Search Console, Google Workspace, or a similar web tool.
- The service generates a unique verification code and asks you to add it as a TXT record in your domain's DNS settings, usually through your domain registrar's or DNS host's control panel.
- The service's systems then look up the public DNS records for your domain, searching for that exact code.
- If the code is found, the service treats this as proof of control: only someone with the ability to edit your domain's DNS settings could have placed that exact text there, so a match is treated as evidence of ownership.
This same TXT record "slot" is also used for other, related purposes — most notably SPF and DKIM records, which are TXT records that help receiving mail servers verify that email claiming to be from your domain is legitimate. Those serve a different purpose from ownership verification, but they're set up the same way: as text added to your domain's DNS.
Why This Matters for a Small Business
Whoever can edit your domain's DNS settings can add or remove verification records on your behalf — which means they effectively control what new tools and platforms your domain can be "proven" to own. If you don't know who currently has login access to your domain registrar or DNS host, you may not know who is able to verify new services under your business's name, or whether a past web developer, agency, or former employee still retains that access.
A simple, practical step is to know — and periodically confirm — who holds the login credentials to your domain registrar and DNS hosting, and to review what DNS records currently exist. It's a small amount of housekeeping that keeps control of your domain's identity where it belongs: with your business.