Public IPs - Telnyx

By default, SIMs get dynamic private IPs — reachable outbound only. A public static IP makes the SIM reachable from the internet ($3/mo per SIM).

Actions

Action	Endpoint
Get Public IP	`GET /sim_cards/{id}/public_ip`
Set Public IP	`POST /sim_cards/{id}/actions/set_public_ip`
Remove Public IP	`POST /sim_cards/{id}/actions/remove_public_ip`
Bulk Set Public IPs	`POST /sim_cards/actions/bulk_set_public_ips`

Inbound access — connect to your SIM from anywhere (SSH, remote management, server-initiated requests)
Firewall allowlists — stable IP for access control rules
Device-as-server — run services on the device that external systems call into

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