Insights & Resources2 min read

New Wireless Feature: Public IP Mapping for IoT SIMs

Our newest Wireless feature will allow our customers to map public IPs to Telnyx SIMs with a few simple clicks via the Telnyx API or Mission Control Portal.

Risa Takenaka
Public IPs - New Wireless fEature
We’re excited to announce that Telnyx Wireless is expanding its feature set! Our newest feature will allow our customers to map public IPs to Telnyx SIMs with a few simple clicks via the Telnyx API or Mission Control Portal. Let’s dive right into what we mean by public IPs and why this feature is beneficial for our customers.

What’s an IP address?

An internet protocol (IP) address is an identifier that is assigned to a specific device connected to a network that uses IP for communication. In short, IP addresses are used to identify and locate devices so that they can communicate with one another. There are four types of IP addresses:
Public IP address - A globally unique address that is given to a device, which allows them to be advertised to the public internet.
Private IP address - Not globally unique, and can be shared by several devices within a single local network, which is not directly accessible from the internet. For example, if I have 4 computers in my house, each one could have a private IP address and can connect to each other, but not to networks outside of it.
Dynamic IP address - A temporary address associated with a device, which changes each time it connects to the web. Dynamic IP addresses are active for a specific period of time, then they expire.
Static IP address - An IP address that is associated with a device and which cannot be changed.

Private IP vs Public Static IP for SIMs

When you buy a Telnyx SIM, it is associated with a dynamic private IP address by default. While private IPs can make requests to the internet, they cannot be reached from other places on the internet -- this means that customers can connect from their SIM but not to their SIM, which limits their usability. If a customer would like to be able to connect to their SIM, and not just from their SIM, they need a public static IP address. Public static IPs give the SIMs an address on the public internet so they can be reached from anywhere else that has internet access.

Telnyx’s Public Static IP Address Feature

Telnyx’s new feature will allow customers to purchase a public static IP address for their SIMs. Specifically, in the Mission Control Portal or through our API, our customers will be able to:
  • Upgrade SIM cards to using a public static IP for $3 per month.
  • Delete public IP addresses on SIMs.
  • View public IP address costs in their invoice.

Public Static IP Use Cases

The main IoT use case for this feature involves pinging the SIM to get information - like for instance, temperature data. For example, a vehicle company transporting COVID-19 vaccines can use IoT SIMs to collect temperature data of refrigeration units during transport, to make sure that the vaccines are in optimal condition while traveling to their destination. IoT SIM cards with public IPs will also provide value to managed service providers (MSPs), who can use their SIMs for LTE failover for their PBX system. When a failure is detected, MSPS can immediately failover to LTE, minimizing downtime on their services.



Getting started with Telnyx Wireless is easy! Simply purchase a SIM on our Mission Control Portal, and follow our Quickstart guides to start using our data.
You’ll find tutorials and product information in our Developer Center, where you can check out our API reference documentation. Finally, if you have any questions along the way, get in touch with our technical experts via our dedicated developer Slack channel.
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