---
sourceDocument: Australia Telecommunications Network Inventory
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/telecom-network-inventory

 Release :

    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia Telecommunications Network Inventory

ft:clusterId :

    - telninv

bundleId :

    - telninv

workflow :

    - Customer and Industry


---

# Create IP subnetwork function

# Create IP subnetwork function {#ariaid-title1}

Release version: Australia  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
<br />

The Create IP Subnetwork function enables you to create an IP subnetwork record in the
Telecommunications Network Inventory application based on the input that you
receive when you instantiate an inventory.
You can use this action as a flow designer action in the Telecommunications Network Inventory workflow. Here, either CIDR or, first IP and last IP, or first IP and total host are required inputs to create a subnetwork. If the parent IP pool is provided in input, then the
function validates and ensures that the subnetwork that is being created is under the provided IP pool.

## Roles and availability {#create_ip_subnetwork__section_ktf_kcv_mxb}

Users with the admin role can add an action to a flow and define the configuration
details of the flow. This function is available as a Flow Designer action in the Telecommunications Network Inventory application so that you can perform
inventory-related data operations.

## Input fields {#create_ip_subnetwork__section_x3s_ncv_mxb}

{#create_ip_subnetwork__table_t4x_qcv_mxb__entry__3}

| Field name | Description | Data type |
|-|-|-|
| Parent IP pool | Provide the name of the parent IP pool to which you want to assign this subnetwork to. | String |
| CIDR | CIDR | String |
| First IP | First IP address in the series | IP Address (Validated IPv4, IPv6) |
| Last IP | Last IP address in the series | IP Address (Validated IPv4, IPv6) |
| Total Host | Number of hosts in the IP subnet | Integer |
| Managed Network | managed network of private IPs | Reference |
[Table 1. Input fields of Create IP subnetwork function]

{#create_ip_subnetwork__table_t4x_qcv_mxb}

## Output {#create_ip_subnetwork__section_gmx_rkb_wxb}

The following table lists the information about the function output.  
{#create_ip_subnetwork__table_trd_glb_wxb__entry__3}

| Name | Description | Data type |
|-|-|-|
| IP subnetwork | Returns a glide a record | Record |
[Table 2. Output of function]

{#create_ip_subnetwork__table_trd_glb_wxb}
**Related concepts**   

* [Allocate Free Number function](https://servicenow-prod.fluidtopics.net/PuuJW2JxrgTywUnIAXcLeg "The Allocate Free Number function enables you to assign free numbers from the Telecommunications Network Inventory number record. You use this function to allocate a quantity of numbers from a specified range to add against the configuration item (CI) in a number element.")
* [Create CI From Template function](https://servicenow-prod.fluidtopics.net/LL~zoSfWRCAzN6vgmL65sw "The TNI Create CI From Template function enables you to create the inventory instance in the designated site or equipment holder in the Telecommunications Network Inventory application. This occurs when you instantiate an inventory with the inventory template. You can automatically create the inventory when you instantiate the network inventory design and assign process.")
* [Cascade Update function](https://servicenow-prod.fluidtopics.net/W97Jp~xw_w8ibvUCGhteRw "The Cascade Update function enables you to update a configuration item (CI) attribute in the Telecommunications Network Inventory application and cascade the change in all related CIs. You can use this function to automatically cascade the field values in related CIs when you use Workflow Studio.")
* [Create and Assign Range/Single Number function](https://servicenow-prod.fluidtopics.net/gjw3tsjWew5ep25EHTlyEA "The Create and Assign Range/Single Number function enables you to create the inventory number records for a number range when you process the network inventory workflow.")
* [Create Logical Interface function](https://servicenow-prod.fluidtopics.net/2nX46P9be0B6QeJSId3OKA "The Create Logical Interface function enables you to create logical interfaces in the Telecommunications Network Inventory application.")
* [Create Logical Connection function](https://servicenow-prod.fluidtopics.net/DgjILFpYXEo~QjRh9KK9ZQ "The Create Logical Connection function enables you to create a logical connection record in the Telecommunications Network Inventory application based on the input (interfaces) that you receive when you instantiate an inventory.")
* [Create Physical Connection function](https://servicenow-prod.fluidtopics.net/7ieQdTkzr9dlznGE7OWaYw "The Create Physical Connection function enables you to create a physical connection record in the Telecommunications Network Inventory application based on the input that you receive when you instantiate an inventory.")
* [CIDR to IP range function](https://servicenow-prod.fluidtopics.net/2zW3eRjGoF3fvMBCMr30Ww "Classless Inter-Domain Range (CIDR) to IP range flow action enables you to create a set of IP addresses using the Classless Inter-Domain Range (CIDR) using Telecommunications Network Inventory application based on the input that you receive when you instantiate an inventory.")
* [Get Interface Summary function](https://servicenow-prod.fluidtopics.net/eBCtV3e6ngo0JOIWyFGiJw "The Get Interface Summary function enables you to retrieve all the network interface records that are associated with the input. You can use this function to automatically get the details of the available interface, connected interface, and the physical connection of the equipment in the Telecommunications Network Inventory application when you use Workflow Studio.")
* [Lookup Next Hub function](https://servicenow-prod.fluidtopics.net/ZzBLvcSLnnYarEgYkudhZQ "The Lookup Next Hub function enables you to take the network interface record as input and return the details of the related physical connection record. You can automatically get the details of the physical connection and interconnected ports of the equipment in the Telecommunications Network Inventory application when you use the Workflow Studio application.")
* [Path Search function](https://servicenow-prod.fluidtopics.net/Y0XR1w7cHadZ_06YQjXcOQ "The Path Search function enables you to execute the path computation function between the starting and ending sites in the Telecommunications Network Inventory application. You can use this function for the path computation when you process the network inventory design and assign.")