# NAME

mmdblookup - a utility to look up an IP address in a MaxMind DB file

# SYNOPSIS

mmdblookup --file [FILE PATH] --ip [IP ADDRESS] [DATA PATH]

# DESCRIPTION

`mmdblookup` looks up an IP address in the specified MaxMind DB file. The record
for the IP address is displayed with `{}` to denote maps and `[]` to denote
arrays. The values are followed by type annotations. This output is _not_ JSON
and is not intended to be used as such. If you need JSON, please see
[`mmdbinspect`](https://github.com/maxmind/mmdbinspect).

If an IP's data entry resolves to a map or array, you can provide a lookup path
to only show part of that data.

For example, given a JSON structure like this:

```js
{
    "names": {
        "en": "Germany",
        "de": "Deutschland"
    },
    "cities": [ "Berlin", "Frankfurt" ]
}
```

You could look up just the English name by calling mmdblookup with a lookup path
of:

```bash
mmdblookup --file ... --ip ... names en
```

Or you could look up the second city in the list with:

```bash
mmdblookup --file ... --ip ... cities 1
```

Array numbering begins with zero (0).

If you do not provide a path to lookup, all of the information for a given IP
will be shown.

# OPTIONS

This application accepts the following options:

-f, --file

: The path to the MMDB file. Required.

-i, --ip

: The IP address to look up. Required.

-v, --verbose

: Turns on verbose output. Specifically, this causes this application to output
the database metadata.

--version

: Print the program's version number and exit.

-h, -?, --help

: Show usage information.

# BUG REPORTS AND PULL REQUESTS

Please report all issues to
[our GitHub issue tracker](https://github.com/maxmind/libmaxminddb/issues). We
welcome bug reports and pull requests. Please note that pull requests are
greatly preferred over patches.

# AUTHORS

This utility was written by Boris Zentner (bzentner@maxmind.com) and Dave Rolsky
(drolsky@maxmind.com).

# COPYRIGHT AND LICENSE

Copyright 2013-2026 MaxMind, Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use
this file except in compliance with the License. You may obtain a copy of the
License at

    https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed
under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, either express or implied. See the License for the
specific language governing permissions and limitations under the License.

# SEE ALSO

libmaxminddb(3)
