---
name: "rpcinfo"
section: "8"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["linux", "freebsd", "openbsd"]
url: "https://new.carta.tech/rpcinfo"
---

# rpcinfo(8)

report RPC information

## NAME

**rpcinfo** – report RPC information

## SYNOPSIS

**rpcinfo** **-b** *program* *version*

**rpcinfo** **-d** *program* *version*

**rpcinfo** **-p** \[*host*\]

**rpcinfo** **-s** *program* *version* *port*

**rpcinfo** \[**-n** *portnum*\] **-t** *host* *program* \[*version*\]

**rpcinfo** \[**-n** *portnum*\] **-u** *host* *program* \[*version*\]

## DESCRIPTION

**rpcinfo** makes an RPC call to an RPC server and reports what it finds.

The options are as follows:

- **-b**

  Make an RPC broadcast to procedure 0 of the specified *program* and *version* using UDP and report all hosts that respond.

- **-d**

  Delete registration for the RPC service of the specified *program* and *version*. Registrations which point at ports numbered below 1024 can only be deleted by the superuser.

- **-n** *portnum*

  Use *portnum* as the port number for the **-t** and **-u** options instead of the port number given by the portmapper.

- **-p**

  Probe the portmapper on *host*, and print a list of all registered RPC programs. If *host* is not specified, it defaults to the value returned by [hostname(1)](/hostname/1.md).

- **-s**

  Create a registration for the RPC service of the specified *program* and *version*, located at port *port*. Registrations which point at ports numbered below 1024 can only be created (or changed) by the superuser.

- **-t**

  Make an RPC call to procedure 0 of *program* on the specified *host* using TCP, and report whether a response was received.

- **-u**

  Make an RPC call to procedure 0 of *program* on the specified *host* using UDP, and report whether a response was received.

The *program* argument can be either a name or a number.

If a *version* is specified, **rpcinfo** attempts to call that version of the specified *program*. Otherwise, **rpcinfo** attempts to find all the registered version numbers for the specified *program* by calling version 0 (which is presumed not to exist; if it does exist, **rpcinfo** attempts to obtain this information by calling an extremely high version number instead) and attempts to call each registered version. Note: the version number is required for **-b** and **-d** options.

## EXAMPLES

To show all of the RPC services registered on the local machine use:

```
$ rpcinfo -p
```

To show all of the RPC services registered on the machine named *klaxon* use:

```
$ rpcinfo -p klaxon
```

To show all machines on the local net that are running the Yellow Pages service use:

```
$ rpcinfo -b ypserv 'version' | uniq
```

where 'version' is the current Yellow Pages version obtained from the results of the **-p** switch above.

To delete the registration for version 1 of the **walld** service use:

```
$ rpcinfo -d walld 1
```

## SEE ALSO

[rpc(5)](/rpc/5.md), [portmap(8)](/portmap/8.md) *RPC Programming Guide*.