Why your DNS needs a backup

DNS is the most critical layer of your infrastructure and the least likely to be backed up. Here's why that's a problem.

DNS is the foundation everything else sits on. Your website, your email, your APIs, your SaaS integrations — all of it resolves through DNS. If your records are wrong or missing, nothing works.

And yet almost nobody backs them up.

The asymmetry

You back up your database. You back up your code. You probably back up your server configs. But DNS? Most teams treat it as “set and forget” — a few records configured years ago by someone who’s since left the company.

The asymmetry is stark: DNS is the most critical layer, and the least likely to have a backup.

How DNS records get lost

There are three common failure modes, and none of them are dramatic enough to trigger alarms until the damage is done.

Accidental deletion. Someone cleans up old records and removes one that’s still in use. A wildcard record gets deleted. An MX priority gets changed. The zone panel doesn’t warn you, and there’s no undo button.

Migration data loss. You move domains from one provider to another. The zone export looks complete, but it quietly drops SRV records, or truncates long TXT values, or misses DKIM entries. You don’t discover this until Microsoft 365 authentication fails or email stops arriving.

Account expiry. A provider account lapses. The credit card expired, nobody updated it, and the provider purges the zone data. By the time you notice, the records are gone.

In all three cases, the fix is simple — if you have the old records. Without them, you’re reconstructing your DNS from memory, from Slack messages, from old screenshots, from whatever you can find.

Why manual exports don’t work

“I’ll just export my zone file and keep it somewhere.”

You do it once. You put it in a Google Doc or a text file in Dropbox. Then you change three records over the next six months and never re-export. The backup is stale. When you need it, it’s worse than useless — it’s confidently wrong.

Manual exports decay because they depend on discipline. And discipline doesn’t scale across 40 domains and three providers.

What a proper DNS backup looks like

A proper backup is:

  • Automatic. It happens without anyone remembering to do it.
  • Change-aware. It captures the state before and after every modification, not just a periodic dump.
  • Complete. Every record type: A, AAAA, CNAME, MX, TXT, SRV, NS, SOA, CAA.
  • Portable. Standard BIND zone file format. No proprietary lock-in. Works with any provider.
  • Diffable. You can compare any two snapshots to see exactly what changed and when.

This is what we built BackupMyDNS to do. Connect your providers with read-only API access, and every DNS change across all your domains is captured automatically. When something breaks, you have the full history to restore from.

Your first domain is free. Set it up before you need it.