Common DNS setups: websites, subdomains and services

Most DNS work falls into a handful of recognisable patterns:

• Point a domain at a website — an A record on the root (@) to the server's IPv4, plus www as an A or CNAME to the root. Add AAAA if the host supports IPv6.
• Add a subdomain — an A/AAAA or CNAME for blog, shop, app, etc., pointing wherever that service lives.
• Verify domain ownership — many services (Google, Microsoft, payment providers) ask you to add a TXT record to prove control.
• Set up email — the provider's MX records plus SPF/DKIM/DMARC TXT records.
• VoIP/SIP — SRV records so clients find your voice service.
• Restrict certificate issuance — a CAA record naming your permitted certificate authority.

All of these are point-and-click in the panel, published across the three nameservers, and subject only to the record's TTL before the world sees them. For anything unusual, our UK support team can sanity-check a zone before you commit. See https://transcom.co.uk/domains