---
title: "Hosts"
slug: "assets-2"
updated: 2025-05-15T05:58:25Z
published: 2025-05-15T05:58:25Z
canonical: "help.nucleussec.com/assets-2"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.nucleussec.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Hosts

### Fields

The following fields are specific to Host type asset:

| Name | Description | Accepted Values or Format |
| --- | --- | --- |
| host_name | ***Special*.*** The primary host name or FQDN for this host. | N/A |
| ip_address | ***Special*.*** The primary IP address for this host. | IPv4 or IPv6 addresses. |
| host_name_secondary | ***Optional.*** A list of hostnames and FQDNs distinct from the primary host_name field that this Host asset is associated with. | List of hostnames. |
| host_ip_secondary | ***Optional.*** A list of IP addresses distinct from the primary IP address that this Host asset is associated with. | List of IPv4 and/or IPv6 addresses. |
| mac_address | ***Optional.*** The MAC address for this host. | A 12-digit hexadecimal number represented by a colon-hexadecimal notation. E.g. 00:11:22:33:44:55 |
| operating_system_name | ***Optional.*** The name of the operating system running on this host. | N/A |
| operating_system_version | ***Optional.*** The version of the operating system running on this host. | N/A |
| host_location | ***Optional.*** The location of this host. | N/A |

<editor360-custom-block data-preprocessing="true" data-sanitizationtags="em"><section class="warningBox"><div class="remove-callout" contenteditable="false"><span class="fal fa-trash-alt"></span></div><div class="title fr-deletable">Fields Marked <em>Special</em><em>*</em></div><div class="content fr-inner">At least one of host_name or ip_address is required for a host to be valid.</div></section></editor360-custom-block>

#### Host Asset Field Examples

**JSON Schema**

```plaintext
{
    "nucleus_import_version": "1",
    "scan_tool": "Asset",
    "scan_type": "Host",
    "assets": [
        {
            "host_name": "mysecretserver",
            "ip_address": "10.0.0.1",
            "host_name_secondary": [
                "2.my.secret.server.com",
                "3.my.secret.server.com"
            ],
            "host_ip_secondary": [
                "10.0.1.1",
                "10.0.2.1"
            ],
            "host_fqdn": "my.secret.server.com",
            "mac_address": "00:11:22:33:44:55",
            "operating_system_name": "Microsoft Windows 10 Enterprise",
            "operating_system_version": "12345",
            "host_location": "Data Center 1"
        }
    ]
}
```

**Example XML**

Markup

```plaintext
<nucleusCustomScan>
    <nucleus_import_version>1</nucleus_import_version>
    <scan_tool>Asset</scan_tool>
    <scan_type>Host</scan_type>
    <assets>
        <asset>
            <host_name>mysecretserver</host_name>
            <ip_address>1.0.0.1</ip_address>
            <host_name_secondary>
                <host_name>2.my.secret.server.com</host_name>
                <host_name>3.my.secret.server.com</host_name>
            </host_name_secondary>
            <host_ip_secondary>
                <ip_address>10.0.1.1</ip_address>
                <ip_address>10.0.2.1</ip_address>
            </host_ip_secondary>
            <host_fqdn>my.secret.server.com</host_fqdn>
            <mac_address>00:11:22:33:44:55</mac_address>
            <operating_system_name>Microsoft Windows 10 Enterprise</operating_system_name>
            <operating_system_version>12345</operating_system_version>
            <host_location>Data Center 1</host_location>
        </asset>
    </assets>
</nucleusCustomScan>
```

**Example CSV**

Markup

```plaintext
nucleus_import_version,scan_tool,scan_type,host_name,ip_address,host_name_secondary,host_ip_secondary,host_fqdn,mac_address,operating_system_name,operating_system_version,host_location
1,Asset,Host,mysecretserver,10.0.0.1,2.my.secret.server.com;3.my.secret.server.com,10.0.1.1;10.0.2.1,my.secret.server.com,00:11:22:
```

###