SIP Registration Status

Returns the live SIP registration status for a Telnyx endpoint: whether it is currently registered, when the current registration expires, and the last response Telnyx received from the registrar.

The endpoint supports three credential types, selected with the credential_type query parameter. Each type is keyed by a different identifier:

`credential_type`	Keyed by	Use case
`uac_external_credential`	`connection_id`	A UAC (SIP attach) connection that registers to an external PBX.
`telephony_credential`	`username`	An ephemeral, one-time-use telephony credential.
`sip_credential_connection`	`username`	A traditional SIP credential connection that registers directly to Telnyx.

The authenticated account is taken from your API key; you can only read the registration status of connections and credentials your account owns.

GET

sip_registration_status

JavaScript

import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const sipRegistrationStatus = await client.sipRegistrationStatus.retrieve({
  credential_type: 'uac_external_credential',
});

console.log(sipRegistrationStatus.connection_id);

import os
from telnyx import Telnyx

client = Telnyx(
    api_key=os.environ.get("TELNYX_API_KEY"),  # This is the default and can be omitted
)
sip_registration_status = client.sip_registration_status.retrieve(
    credential_type="uac_external_credential",
)
print(sip_registration_status.connection_id)

package main

import (
	"context"
	"fmt"

	"github.com/team-telnyx/telnyx-go"
	"github.com/team-telnyx/telnyx-go/option"
)

func main() {
	client := telnyx.NewClient(
		option.WithAPIKey("My API Key"),
	)
	sipRegistrationStatus, err := client.SipRegistrationStatus.Get(context.TODO(), telnyx.SipRegistrationStatusGetParams{
		CredentialType: telnyx.SipRegistrationStatusGetParamsCredentialTypeUacExternalCredential,
	})
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", sipRegistrationStatus.ConnectionID)
}

package com.telnyx.sdk.example;

import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;
import com.telnyx.sdk.models.sipregistrationstatus.SipRegistrationStatusRetrieveParams;
import com.telnyx.sdk.models.sipregistrationstatus.SipRegistrationStatusRetrieveResponse;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        TelnyxClient client = TelnyxOkHttpClient.fromEnv();

        SipRegistrationStatusRetrieveParams params = SipRegistrationStatusRetrieveParams.builder()
            .credentialType(SipRegistrationStatusRetrieveParams.CredentialType.UAC_EXTERNAL_CREDENTIAL)
            .build();
        SipRegistrationStatusRetrieveResponse sipRegistrationStatus = client.sipRegistrationStatus().retrieve(params);
    }
}

require "telnyx"

telnyx = Telnyx::Client.new(api_key: "My API Key")

sip_registration_status = telnyx.sip_registration_status.retrieve(credential_type: :uac_external_credential)

puts(sip_registration_status)

<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

use Telnyx\Client;
use Telnyx\Core\Exceptions\APIException;

$client = new Client(apiKey: getenv('TELNYX_API_KEY') ?: 'My API Key');

try {
  $sipRegistrationStatus = $client->sipRegistrationStatus->retrieve(
    credentialType: 'uac_external_credential',
    connectionID: 'connection_id',
    username: 'username',
  );

  var_dump($sipRegistrationStatus);
} catch (APIException $e) {
  echo $e->getMessage();
}

{
  "connection_id": "1234567890",
  "connection_name": "FreePBX UAC 1002",
  "credential_type": "uac_external_credential",
  "credential_username": "useralice12345",
  "registered": true,
  "sip_registration_status": "registered",
  "last_registration_response": "200 OK",
  "sip_registration_details": {
    "auth_retries": 0,
    "expires": 1780404431,
    "uptime": 1780401551699908,
    "next_action_at": 1780414482,
    "failures": 0,
    "sip_uri_user_host": "1002@192.0.2.10"
  }
}

Authorizations

Authorization

string

header

required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Query Parameters

credential_type

enum<string>

required

The kind of credential to look up. uac_external_credential is keyed by connection_id; telephony_credential and sip_credential_connection are keyed by username.

Available options:

uac_external_credential,

telephony_credential,

sip_credential_connection

connection_id

string

Identifier of the UAC connection to look up. Required when credential_type is uac_external_credential.

username

string

SIP username to look up. Required when credential_type is telephony_credential or sip_credential_connection.

Response

Registration status payload

connection_id

string

Identifier of the connection associated with the credential.

connection_name

string

Human-readable connection name.

credential_type

enum<string>

The credential type that was looked up.

Available options:

uac_external_credential,

telephony_credential,

sip_credential_connection

credential_username

string

SIP username used for the registration.

registered

boolean

True if the endpoint is currently registered.

sip_registration_status

enum<string>

Human-readable registration status derived from the registrar state.

Available options:

unregistering,

connection_disabled,

standby,

failed,

trying,

registered,

unknown

last_registration_response

string | null

SIP response from the last registration attempt.

Example:

"200 OK"

sip_registration_details

object

Detailed registration information reported by the registrar. The populated fields depend on credential_type: UAC external credentials report auth_retries, uptime, next_action_at, failures, and sip_uri_user_host; telephony credentials and SIP credential connections report ua_ip, ua_port, transport, and last_modified. All types report expires.

Show child attributes

⌘I

JavaScript

import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});

const sipRegistrationStatus = await client.sipRegistrationStatus.retrieve({
  credential_type: 'uac_external_credential',
});

console.log(sipRegistrationStatus.connection_id);

import os
from telnyx import Telnyx

client = Telnyx(
    api_key=os.environ.get("TELNYX_API_KEY"),  # This is the default and can be omitted
)
sip_registration_status = client.sip_registration_status.retrieve(
    credential_type="uac_external_credential",
)
print(sip_registration_status.connection_id)

package main

import (
	"context"
	"fmt"

	"github.com/team-telnyx/telnyx-go"
	"github.com/team-telnyx/telnyx-go/option"
)

func main() {
	client := telnyx.NewClient(
		option.WithAPIKey("My API Key"),
	)
	sipRegistrationStatus, err := client.SipRegistrationStatus.Get(context.TODO(), telnyx.SipRegistrationStatusGetParams{
		CredentialType: telnyx.SipRegistrationStatusGetParamsCredentialTypeUacExternalCredential,
	})
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", sipRegistrationStatus.ConnectionID)
}

package com.telnyx.sdk.example;

import com.telnyx.sdk.client.TelnyxClient;
import com.telnyx.sdk.client.okhttp.TelnyxOkHttpClient;
import com.telnyx.sdk.models.sipregistrationstatus.SipRegistrationStatusRetrieveParams;
import com.telnyx.sdk.models.sipregistrationstatus.SipRegistrationStatusRetrieveResponse;

public final class Main {
    private Main() {}

    public static void main(String[] args) {
        TelnyxClient client = TelnyxOkHttpClient.fromEnv();

        SipRegistrationStatusRetrieveParams params = SipRegistrationStatusRetrieveParams.builder()
            .credentialType(SipRegistrationStatusRetrieveParams.CredentialType.UAC_EXTERNAL_CREDENTIAL)
            .build();
        SipRegistrationStatusRetrieveResponse sipRegistrationStatus = client.sipRegistrationStatus().retrieve(params);
    }
}

require "telnyx"

telnyx = Telnyx::Client.new(api_key: "My API Key")

sip_registration_status = telnyx.sip_registration_status.retrieve(credential_type: :uac_external_credential)

puts(sip_registration_status)

<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

use Telnyx\Client;
use Telnyx\Core\Exceptions\APIException;

$client = new Client(apiKey: getenv('TELNYX_API_KEY') ?: 'My API Key');

try {
  $sipRegistrationStatus = $client->sipRegistrationStatus->retrieve(
    credentialType: 'uac_external_credential',
    connectionID: 'connection_id',
    username: 'username',
  );

  var_dump($sipRegistrationStatus);
} catch (APIException $e) {
  echo $e->getMessage();
}

{
  "connection_id": "1234567890",
  "connection_name": "FreePBX UAC 1002",
  "credential_type": "uac_external_credential",
  "credential_username": "useralice12345",
  "registered": true,
  "sip_registration_status": "registered",
  "last_registration_response": "200 OK",
  "sip_registration_details": {
    "auth_retries": 0,
    "expires": 1780404431,
    "uptime": 1780401551699908,
    "next_action_at": 1780414482,
    "failures": 0,
    "sip_uri_user_host": "1002@192.0.2.10"
  }
}

Getting Started

Authentication

Configuration

Routing

Network Configuration

Features

STIR/SHAKEN

Emergency Calling

Troubleshooting

SIP Integrations Guides

API Reference

For AI Agents

SIP Registration Status

Authorizations

Query Parameters

Response