Fixed IP SIM Cards for IoT & M2M Applications
Secure, reliable, and remotely accessible Fixed IP SIM Cards providing mobile connectivity for industrial M2M / IoT and business-critical devices.
What Is a Fixed IP SIM Card?
Fixed IP SIM cards provide a consistent, static IP address every time a device connects to the mobile network. This is essential for remotely accessing or managing IoT and M2M devices such as routers, CCTV cameras, industrial gateways, payment terminals, and telemetry units. Unlike consumer SIMs with dynamic IPs that change on every connection, Fixed IP SIMs allow predictable, stable communications and enhanced control.
Fixed IP SIMs can be provisioned with either a public IP address or a private IP address, depending on how the device should be accessed and secured.
To explore our broader portfolio of M2M-ready SIMs and connectivity options, visit our IoT Connectivity Solutions page.
Fixed Public IP SIM Cards vs Fixed Private IP SIM Cards
🔓 Fixed Public IP SIM Cards
A public IP address is directly reachable from the internet. When a SIM is configured with a fixed public IP, you can access the device from any external network, making it ideal for scenarios where ease of access is essential.
Important Note: While your device can be accessed using a public IP, many mobile networks assign a private internal IP (often starting with 10.xxx.xxx.xxx) to the router, and use carrier-grade NAT (CGNAT) to expose a public IP address. In these cases, the router cannot receive the true, non-NATed public IP internally. This is important for applications requiring full IP passthrough or bridge mode (e.g. office firewalls or enterprise routers), where a non-NATed public IP (also known as a real routed public IP) must be assigned directly to the device. Always check with your provider if your application requires public IP address routing rather than NAT-based access.
Benefits of Public Fixed IP:
- Direct access via public internet (no VPN required)
- Easier to integrate with cloud platforms and web applications
- Ideal for NAT forwarding, remote GUI access, VPN servers, and inbound control
Use Cases:
- Remote access to 4G/5G routers in commercial buildings
- CCTV installations requiring direct access to camera feeds
- IoT environmental sensors with live telemetry
- Smart kiosks and digital signage platforms with backend monitoring
🔐 Fixed Private IP SIM Cards
Private IP SIMs are assigned an IP address within a closed mobile operator network. These addresses are not visible on the public internet and must be accessed through a secure VPN tunnel (IPsec, GRE, or OpenVPN) connected to the mobile network core.
Benefits of Private Fixed IP:
- Enhanced security via full network isolation
- Hidden from public internet scans and threats
- Better suited for centralised, controlled deployments with VPN access
Use Cases:
- Smart metering and energy monitoring (gas, electric, water)
- Vehicle tracking and fleet telematics
- SCADA systems in industrial plants
- Retail terminals or payment gateways in PCI-DSS-compliant networks
Fixed IP with eSIM, eUICC and IoT SIMs
Whether using:
- A traditional 2FF/3FF/4FF plastic SIM
- A removable eUICC SIM (over-the-air profile switching)
- Or a true embedded eSIM module (as in the Teltonika RUT241 eSIM-enabled version)
the assignment of a fixed IP address remains independent of the SIM form factor. The IP configuration is managed via the mobile operator’s core network, allowing consistent device reachability regardless of whether you’re using a local or roaming profile.
This capability is especially valuable when combining fixed IP services with eSIM & eUICC, as profiles can be updated remotely while maintaining IP routing integrity.
Roaming SIMs with Fixed IP: Multi-Network Compatibility
Fixed IP services are compatible with both:
- Single-Network SIMs from operators like Vodafone, O2, or EE
- Multi-Network / Roaming SIMs, which automatically switch between multiple carriers
With roaming SIMs:
- Devices retain their fixed IP regardless of the active network (when correctly provisioned)
- Network failover does not affect IP address assignments
- They can be used in industrial-grade routers, vending machines, and logistics terminals for global deployments
Whether it’s a plastic SIM or an embedded eSIM solution, these services remain consistent and reliable for mission-critical use cases.
Real-World Use Case Scenarios
🏢 Enterprise Router with Public IP for IP Passthrough
A business installs a Teltonika RUTX09 in bridge mode to feed a firewall. A non-NATed public IP is required to assign directly to the firewall’s WAN port. A fixed public IP SIM with full IP passthrough (not CGNAT) is essential.
📷 Security Firm Deploying Remote CCTV
A mobile surveillance trailer needs 24/7 remote video access. Using a Fixed Public IP SIM, operators can connect to the DVR interface without requiring a VPN client.
🛒 Retail Kiosks With Fixed Private IP and VPN
A national retailer uses a private fixed IP SIM in each in-store POS device, connected via secure VPN tunnel to the HQ. Centralised logging and PCI compliance are maintained.
🚛 Fleet Management Company
Tracking units in thousands of vehicles use roaming SIMs with fixed private IPs. VPN tunnels allow secure two-way communication with all units from a single static endpoint.
Public vs Private Fixed IP: Pros & Cons
| Feature | Public Fixed IP | Private Fixed IP |
|---|---|---|
| Inbound Access | Direct via internet | Via VPN only |
| Exposure to Threats | High (router firewall required) | Very low (no public exposure) |
| Ease of Setup | Simple (no VPN setup needed) | Slightly complex (VPN setup required) |
| Ideal For | Remote GUI, camera feeds, cloud apps | Large-scale secure deployments |
| IP Passthrough Support | Check for non-NATed IP availability | Not applicable |
Security Considerations For Fixed IP SIM Cards
Security is a vital part of using Fixed IP SIM Cards — particularly those with public accessibility. While public fixed IPs offer convenience, they also require strict device-level security:
Public Fixed IP Best Practices:
- Enable router firewalls and restrict port forwarding
- Whitelist IP addresses that can access the router
- Use dynamic DNS with authentication and rate limiting
- Consider switching to private fixed IP + VPN if risk level is high
Private Fixed IP Best Practices:
- Establish persistent VPN tunnels with automatic re-connect
- Monitor endpoint devices and set alerts on data usage anomalies
- Use encryption between devices and servers
A Key Part of Your IoT Strategy
Fixed IP SIM Cards are a core enabler for scalable, secure IoT architecture. Combined with eUICC-capable profiles and high-availability multi-network SIMs, they offer full control over how your devices are accessed, secured, and managed remotely.
To explore more options for secure mobile IoT deployment, see our Remote SIM Management and Multi-Network SIMs pages.
Whether you’re starting small or scaling across thousands of remote endpoints, our SIMs are designed to work with eSIM-enabled routers, embedded platforms, and traditional devices — all backed by secure Fixed IP infrastructure.