---
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


---

# IP Address Block form

# IP Address Block form {#ariaid-title1}

Release version: Australia  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
The IP Address Block form defines a top-level IP address range using CIDR notation. Use this reference to understand the available fields and their behavior.

## IP Address Block form fields

{#ip-address-block-form__ip-address-block-form-fields__entry__2}

| Field | Description |
|-|-|
| Name | User-friendly name for the IP Address Block. |
| CIDR | The Classless Inter-Domain Routing (CIDR) notation that defines the address range of this block. Supports IPv4 prefixes /0 to /32 and IPv6 prefixes /0 to /128. |
| Managed Network | The Managed Network this block belongs to. If set, the value propagates to all subnetworks beneath this block and can't be changed at a lower level. For more information, see [Managed Network form](https://servicenow-prod.fluidtopics.net/Tqzf_R_sgc~bMlW8YQUZwQ "The Managed network form enables you to manage a network in the Telecommunications Network Inventory application."). |
| Description | Free-text description. |
| Life Cycle Stage | The current lifecycle stage of the block. Default value: Operational. Used together with Life Cycle Stage Status to determine if the block is active. |
| Life Cycle Stage Status | The current lifecycle stage status. This field is automatically set to In Use. Note: The block is active when Life Cycle Stage is Operational and when Life Cycle Stage Status is In Use. |
| Reported Addresses In Use | The count of addresses currently in use under this block. |
| Reported Free Addresses | The count of addresses available for use under this block. |
| Reported Reserved Addresses | The count of addresses flagged as reserved under this block. |
[Table 1. IP Address Block form fields]

{#ip-address-block-form__ip-address-block-form-fields}
**Related concepts**   

* [Managed Network and IP address allocation](https://servicenow-prod.fluidtopics.net/nf5Kq4mJusXInpmSLduO4w "A Managed Network record defines a network scope that can be assigned to an IP Address Block. After assigned, the Managed Network propagates to every IP Subnetwork beneath that block.")  
**Related tasks**   

* [Create an IP Address Block record](https://servicenow-prod.fluidtopics.net/S7~AWj2an5aZ90dtgd~GTw "Create an IP Address Block record to define a top-level IP address range, expressed in Classless Inter-Domain Routing (CIDR) notation. The block becomes the parent for one or more IP Subnetworks. Supports both IPv4 and IPv6.")  
**Related reference**   

* [CIDR validation rules for IP Address Blocks and IP Subnetworks](https://servicenow-prod.fluidtopics.net/pz42Yup53fGYi9ouI5lr_A "The CIDR value entered on an IP Address Block or IP Subnetwork record is validated when the record is saved. Invalid CIDR values are rejected with an inline error message; the record cannot be saved until the value passes all rules.")
* [Hierarchy rules for IP Subnetworks](https://servicenow-prod.fluidtopics.net/w23g6E9ewprlk5TMK~fNmQ "These rules apply only when creating or updating an IP Subnetwork (which always has a parent — either an IP Address Block or another IP Subnetwork).")
* [Inventory number allocation fields](https://servicenow-prod.fluidtopics.net/aDz1~zcDpFepvPA6bQe_5Q "The inventory number allocation fields enables you to describe the details for LAG, VLAN, IP address, and telephone number records.")