---
name: "CURLINFO_LOCAL_PORT"
section: "3"
platform: "linux"
package: "curl"
version: "8.23.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLINFO_LOCAL_PORT"
---

# CURLINFO\_LOCAL\_PORT(3)

latest local port number

## NAME

CURLINFO\_LOCAL\_PORT - latest local port number

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_LOCAL_PORT, long *portp);
```

## DESCRIPTION

Pass a pointer to a long to receive the local port number of the most recent connection done with this **curl** handle.

If the connection was done using QUIC, the port number is a UDP port number, otherwise it is a TCP port number.

If no connection was established or if the protocol does not use ports, -1 is returned.

## PROTOCOLS

This functionality affects quic and tcp

## EXAMPLE

```
int main(void)
{
  CURL *curl;
  CURLcode result;
  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    result = curl_easy_perform(curl);
    if(result == CURLE_OK) {
      long port;
      result = curl_easy_getinfo(curl, CURLINFO_LOCAL_PORT, &port);
      if(result == CURLE_OK) {
        printf("We used local port: %ld\n", port);
      }
    }
    curl_easy_cleanup(curl);
  }
  return 0;
}
```

## AVAILABILITY

Added in curl 7.21.0

## RETURN VALUE

*[curl\_easy\_getinfo(3)](/curl_easy_getinfo/3.md)* returns a CURLcode indicating success or error.

CURLE\_OK (0) means everything was OK, non-zero means an error occurred, see *[libcurl-errors(3)](/libcurl-errors/3.md)*.

## SEE ALSO

[**CURLINFO\_LOCAL\_IP**(3)](/CURLINFO_LOCAL_IP/3.md), [**CURLINFO\_PRIMARY\_PORT**(3)](/CURLINFO_PRIMARY_PORT/3.md), [**curl\_easy\_getinfo**(3)](/curl_easy_getinfo/3.md), [**curl\_easy\_setopt**(3)](/curl_easy_setopt/3.md)