Domain and DNS check
Check the records your domain depends on, the mail authentication attached to it, and how long you actually own it. One domain, no account.
We query public DNS from several resolvers. Nothing is changed and nothing is registered.
What this check actually queries
DNS problems are rare and total. When they happen nothing works, no code changed, and the cause is usually administrative: a record removed, a nameserver that disagrees, a renewal that lapsed. This check looks at the things that fail that way, before they do.
- Nameserver agreement
Every authoritative server returning the same answer.
- Core records
A, AAAA, CNAME and MX, with TTLs low enough to fix a mistake.
- Mail authentication
SPF, DKIM and DMARC — whether anyone can send as you.
- Domain expiry
The registration date, which is not the certificate date.
- DNSSEC
Enabled, and whether the chain actually validates.
What a result looks like
Registrar auto-renew is on; card expires first.
Consistent answers from every resolver queried.
Published, but instructing nobody to reject anything.
Every record is reported as it resolves today, with what a correct value would look like and what breaks if you change it carelessly. No pass or fail badge — a domain with perfect records and 70 days of registration left is not passing.
A check tells you about today. Monitoring tells you at 04:00.
Nothing here changes often, which is exactly the danger: a record edited during an unrelated migration is discovered when mail stops arriving, and a lapsed domain is discovered by a customer. Monitoring watches these records and tells you the day one of them changes.
Common questions
- Is this the same engine as the paid monitoring?
- Yes — the same checks, run the same way. The difference is that monitoring repeats them on a schedule and keeps the history, which is what turns a number into a trend and a trend into an alert.
- Does testing my site slow it down or change anything?
- No. Everything is read from the outside, the way a visitor arrives — no agent, no script on your pages, nothing written. Our requests identify themselves so you can recognise them in your own logs.
- Can you check a domain I do not own?
- The public records, yes — anyone can query those. Monitoring a domain continuously requires proving control of the site, because alerts about someone else infrastructure are not yours to receive.
Related tests
A free test is a snapshot. Monitoring is the product.