Common query
- Input
- UDP/53
- Expected output
- Consulta DNS tradicional
Most common day-to-day case.
port 53
Port 53 — DNS
DNS is another very objective search. That is why the page opens with the relevant result already isolated.
DNS on 53
- DNS usually uses UDP 53 for fast queries and TCP 53 for zone transfers, large responses and specific scenarios.
- Today complementary protocols like DoT and DoH also appear, but port 53 remains central for traditional DNS.
Practical examples
Zone transfer
- Input
- TCP/53
- Expected output
- Fluxo de zona ou resposta grande
More specific scenario.
Full tool FAQ
Deliberate decision: unauthorized port scanning is an abuse vector and has legal implications in several countries. We prefer a clear, safe reference.
Frequently asked questions
Does DNS use UDP or TCP?
Both. UDP is more common; TCP appears in zone transfers and specific responses.
Does DoH use port 53?
No. DNS over HTTPS usually uses 443.