Most people don't think about DNS until something goes wrong. And when it does go wrong, the symptoms are confusing - your site looks fine from your laptop, but half your users can't reach it. Or your email stops arriving. Or your CDN starts serving stale content. All because a record changed somewhere and nobody noticed.
I've seen a few patterns come up repeatedly, so here's what actually happens in practice.
The Hosting Migration Nobody Told You About
You move hosts, update your A record, everything works. Six months later you need to change something and realise the old A record is still hanging around as a secondary. Two DNS providers are returning different IPs. Some users hit the new server, some hit the old one that's been decommissioned. Your site works for you because your ISP cached the correct record.
This is surprisingly common with managed WordPress hosts and agency handovers. The fix is obvious once you know about it - the problem is knowing about it.
The Expired Domain Renewal
Your domain auto-renews every year. Except one year the card on file expires, the renewal emails go to an address nobody checks, and the domain lapses. Your DNS records disappear. Your entire online presence vanishes overnight. Registrars usually have a grace period, but during that window your site is completely unreachable.
MX Records and the Email Black Hole
Someone updates your A record and accidentally deletes the MX record in the process. Your website works fine. Your email silently stops arriving. No bounce messages, no errors - senders get a delayed delivery failure hours later if they're lucky. You don't notice until a client asks why you haven't replied in three days.
The TTL Trap
You set your DNS TTL to 86400 (24 hours) for performance. Then you need to make an emergency change. Even after updating the record, a chunk of the internet is still serving the old value for up to 24 hours. If you'd been monitoring the record, you'd have lowered the TTL in advance.
How Monitoring Helps
DNS monitoring checks your actual records at regular intervals and alerts you when something changes. Not just when your website is down - when the records themselves change. That means you catch:
- Unauthorised changes (someone modifying records you didn't expect)
- Propagation issues (your change hasn't reached all nameservers)
- Disappearing records (accidental deletion during other edits)
- Unexpected additions (a compromised DNS provider adding records)
WebMon checks A, AAAA, MX, CNAME, NS, TXT, and SRV records. You set what the expected value should be, and we alert you if it ever differs. Simple, but it catches problems that uptime monitoring alone misses entirely.
The Boring Truth
DNS issues aren't dramatic. They don't trigger 500 errors or crash your server. They just quietly misdirect traffic until someone figures out what's going on, usually by accident. Monitoring your records takes about 30 seconds to set up and saves you the kind of debugging session where you question your own sanity.
You can add DNS monitors from your dashboard - just select "DNS" as the monitor type and specify the record you want to watch.