# WHATPORT(1034)

## NAME

port 1034 — activesync — Registered in 2003 for "ActiveSync Notifications" — not the Exchange ActiveSync you sync a phone with.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

IANA assigns 1034 to `activesync`, "ActiveSync Notifications", registered in 2003. It is easy to confuse with Exchange ActiveSync, the mail and calendar sync protocol phones use, but that runs over HTTPS on 443 and never touches this port. There is no public specification for what 1034 carried, and the registration is the only durable record. On scans it behaves like the rest of this band: a dynamically assigned RPC endpoint on legacy Windows, or an unrelated application on a free low port.

## EXPOSURE

**Expose with care.** No documented protocol and no way to reason from the number alone — identify the listener before allowing it through a firewall.

## CHECK

```sh
nmap -Pn -sV -p 1034 TARGET
```

## SEE ALSO

- iana — [IANA Service Name and Transport Protocol Port Number Registry](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml) (iana.org)

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HTML: <https://whatport.net/1034/> · JSON: <https://whatport.net/1034.json> · full dataset: <https://whatport.net/ports.json>