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Telnyx API

telnyx · Company

Company No Auth Free & Open telecom

SIP trunking, SMS, MMS, Call Control and Telephony Data Services.

Authentication

No authentication requiredFree to use with no key needed.

Sample Requests

GET List available phone number blocks

List available phone number blocks

https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_number_blocks?filter[limit]=100&filter[features]=voice,sms&filter[locality]=example&filter[number_type]=toll-free&filter[rate_center]=CHICAGO HEIGHTS&filter[country_code]=US&filter[minimum_block_size]=100&filter[administrative_area]=IL&filter[phone_number][contains]=456&filter[phone_number][ends_with]=8000&filter[national_destination_code]=example&filter[phone_number][starts_with]=201

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_number_blocks?filter[limit]=100&filter[features]=voice%2Csms&filter[locality]=example&filter[number_type]=toll-free&filter[rate_center]=CHICAGO%20HEIGHTS&filter[country_code]=US&filter[minimum_block_size]=100&filter[administrative_area]=IL&filter[phone_number][contains]=456&filter[phone_number][ends_with]=8000&filter[national_destination_code]=example&filter[phone_number][starts_with]=201"
import requests
params = {
    "filter[limit]": "100",
    "filter[features]": "voice,sms",
    "filter[locality]": "example",
    "filter[number_type]": "toll-free",
    "filter[rate_center]": "CHICAGO HEIGHTS",
    "filter[country_code]": "US",
    "filter[minimum_block_size]": "100",
    "filter[administrative_area]": "IL",
    "filter[phone_number][contains]": "456",
    "filter[phone_number][ends_with]": "8000",
    "filter[national_destination_code]": "example",
    "filter[phone_number][starts_with]": "201"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_number_blocks",
    params=params,
)
print(response.json())
const url = new URL('https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_number_blocks');
url.searchParams.set('filter[limit]', '100');
url.searchParams.set('filter[features]', 'voice,sms');
url.searchParams.set('filter[locality]', 'example');
url.searchParams.set('filter[number_type]', 'toll-free');
url.searchParams.set('filter[rate_center]', 'CHICAGO HEIGHTS');
url.searchParams.set('filter[country_code]', 'US');
url.searchParams.set('filter[minimum_block_size]', '100');
url.searchParams.set('filter[administrative_area]', 'IL');
url.searchParams.set('filter[phone_number][contains]', '456');
url.searchParams.set('filter[phone_number][ends_with]', '8000');
url.searchParams.set('filter[national_destination_code]', 'example');
url.searchParams.set('filter[phone_number][starts_with]', '201');

const response = await fetch(url); 
const data = await response.json();
console.log(data);
package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_number_blocks")
	q := baseURL.Query()
	q.Set("filter[limit]", "100")
	q.Set("filter[features]", "voice,sms")
	q.Set("filter[locality]", "example")
	q.Set("filter[number_type]", "toll-free")
	q.Set("filter[rate_center]", "CHICAGO HEIGHTS")
	q.Set("filter[country_code]", "US")
	q.Set("filter[minimum_block_size]", "100")
	q.Set("filter[administrative_area]", "IL")
	q.Set("filter[phone_number][contains]", "456")
	q.Set("filter[phone_number][ends_with]", "8000")
	q.Set("filter[national_destination_code]", "example")
	q.Set("filter[phone_number][starts_with]", "201")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}
require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_number_blocks")
uri.query = URI.encode_www_form({
  "filter[limit]" => "100",
  "filter[features]" => "voice,sms",
  "filter[locality]" => "example",
  "filter[number_type]" => "toll-free",
  "filter[rate_center]" => "CHICAGO HEIGHTS",
  "filter[country_code]" => "US",
  "filter[minimum_block_size]" => "100",
  "filter[administrative_area]" => "IL",
  "filter[phone_number][contains]" => "456",
  "filter[phone_number][ends_with]" => "8000",
  "filter[national_destination_code]" => "example",
  "filter[phone_number][starts_with]" => "201"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)
<?php
$url = "https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_number_blocks?" . http_build_query([
    "filter[limit]" => "100",
    "filter[features]" => "voice,sms",
    "filter[locality]" => "example",
    "filter[number_type]" => "toll-free",
    "filter[rate_center]" => "CHICAGO HEIGHTS",
    "filter[country_code]" => "US",
    "filter[minimum_block_size]" => "100",
    "filter[administrative_area]" => "IL",
    "filter[phone_number][contains]" => "456",
    "filter[phone_number][ends_with]" => "8000",
    "filter[national_destination_code]" => "example",
    "filter[phone_number][starts_with]" => "201"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));
GET List available phone numbers

List available phone numbers

https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_numbers?filter[limit]=100&filter[features]=voice,sms&filter[locality]=example&filter[quickship]=true&filter[reservable]=true&filter[best_effort]=false&filter[number_type]=local&filter[rate_center]=CHICAGO HEIGHTS&filter[country_code]=US&filter[administrative_area]=IL&filter[exclude_held_numbers]=false&filter[phone_number][contains]=example&filter[phone_number][ends_with]=example&filter[national_destination_code]=example&filter[phone_number][starts_with]=example

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_numbers?filter[limit]=100&filter[features]=voice%2Csms&filter[locality]=example&filter[quickship]=true&filter[reservable]=true&filter[best_effort]=false&filter[number_type]=local&filter[rate_center]=CHICAGO%20HEIGHTS&filter[country_code]=US&filter[administrative_area]=IL&filter[exclude_held_numbers]=false&filter[phone_number][contains]=example&filter[phone_number][ends_with]=example&filter[national_destination_code]=example&filter[phone_number][starts_with]=example"
import requests
params = {
    "filter[limit]": "100",
    "filter[features]": "voice,sms",
    "filter[locality]": "example",
    "filter[quickship]": "true",
    "filter[reservable]": "true",
    "filter[best_effort]": "false",
    "filter[number_type]": "local",
    "filter[rate_center]": "CHICAGO HEIGHTS",
    "filter[country_code]": "US",
    "filter[administrative_area]": "IL",
    "filter[exclude_held_numbers]": "false",
    "filter[phone_number][contains]": "example",
    "filter[phone_number][ends_with]": "example",
    "filter[national_destination_code]": "example",
    "filter[phone_number][starts_with]": "example"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_numbers",
    params=params,
)
print(response.json())
const url = new URL('https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_numbers');
url.searchParams.set('filter[limit]', '100');
url.searchParams.set('filter[features]', 'voice,sms');
url.searchParams.set('filter[locality]', 'example');
url.searchParams.set('filter[quickship]', 'true');
url.searchParams.set('filter[reservable]', 'true');
url.searchParams.set('filter[best_effort]', 'false');
url.searchParams.set('filter[number_type]', 'local');
url.searchParams.set('filter[rate_center]', 'CHICAGO HEIGHTS');
url.searchParams.set('filter[country_code]', 'US');
url.searchParams.set('filter[administrative_area]', 'IL');
url.searchParams.set('filter[exclude_held_numbers]', 'false');
url.searchParams.set('filter[phone_number][contains]', 'example');
url.searchParams.set('filter[phone_number][ends_with]', 'example');
url.searchParams.set('filter[national_destination_code]', 'example');
url.searchParams.set('filter[phone_number][starts_with]', 'example');

const response = await fetch(url); 
const data = await response.json();
console.log(data);
package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_numbers")
	q := baseURL.Query()
	q.Set("filter[limit]", "100")
	q.Set("filter[features]", "voice,sms")
	q.Set("filter[locality]", "example")
	q.Set("filter[quickship]", "true")
	q.Set("filter[reservable]", "true")
	q.Set("filter[best_effort]", "false")
	q.Set("filter[number_type]", "local")
	q.Set("filter[rate_center]", "CHICAGO HEIGHTS")
	q.Set("filter[country_code]", "US")
	q.Set("filter[administrative_area]", "IL")
	q.Set("filter[exclude_held_numbers]", "false")
	q.Set("filter[phone_number][contains]", "example")
	q.Set("filter[phone_number][ends_with]", "example")
	q.Set("filter[national_destination_code]", "example")
	q.Set("filter[phone_number][starts_with]", "example")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}
require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_numbers")
uri.query = URI.encode_www_form({
  "filter[limit]" => "100",
  "filter[features]" => "voice,sms",
  "filter[locality]" => "example",
  "filter[quickship]" => "true",
  "filter[reservable]" => "true",
  "filter[best_effort]" => "false",
  "filter[number_type]" => "local",
  "filter[rate_center]" => "CHICAGO HEIGHTS",
  "filter[country_code]" => "US",
  "filter[administrative_area]" => "IL",
  "filter[exclude_held_numbers]" => "false",
  "filter[phone_number][contains]" => "example",
  "filter[phone_number][ends_with]" => "example",
  "filter[national_destination_code]" => "example",
  "filter[phone_number][starts_with]" => "example"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)
<?php
$url = "https://api.apis.guru/v2/specs/telnyx.com/2.0.0/available_phone_numbers?" . http_build_query([
    "filter[limit]" => "100",
    "filter[features]" => "voice,sms",
    "filter[locality]" => "example",
    "filter[quickship]" => "true",
    "filter[reservable]" => "true",
    "filter[best_effort]" => "false",
    "filter[number_type]" => "local",
    "filter[rate_center]" => "CHICAGO HEIGHTS",
    "filter[country_code]" => "US",
    "filter[administrative_area]" => "IL",
    "filter[exclude_held_numbers]" => "false",
    "filter[phone_number][contains]" => "example",
    "filter[phone_number][ends_with]" => "example",
    "filter[national_destination_code]" => "example",
    "filter[phone_number][starts_with]" => "example"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));
GET Retrieve all comments

Retrieve all comments

https://api.apis.guru/v2/specs/telnyx.com/2.0.0/comments?filter[comment_record_id]=8ffb3622-7c6b-4ccc-b65f-7a3dc0099576&filter[comment_record_type]=sub_number_order

Hover any highlighted part to learn what it does

curl -X GET "https://api.apis.guru/v2/specs/telnyx.com/2.0.0/comments?filter[comment_record_id]=8ffb3622-7c6b-4ccc-b65f-7a3dc0099576&filter[comment_record_type]=sub_number_order"
import requests
params = {
    "filter[comment_record_id]": "8ffb3622-7c6b-4ccc-b65f-7a3dc0099576",
    "filter[comment_record_type]": "sub_number_order"
}
response = requests.get(
    "https://api.apis.guru/v2/specs/telnyx.com/2.0.0/comments",
    params=params,
)
print(response.json())
const url = new URL('https://api.apis.guru/v2/specs/telnyx.com/2.0.0/comments');
url.searchParams.set('filter[comment_record_id]', '8ffb3622-7c6b-4ccc-b65f-7a3dc0099576');
url.searchParams.set('filter[comment_record_type]', 'sub_number_order');

const response = await fetch(url); 
const data = await response.json();
console.log(data);
package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
)

func main() {
	baseURL, _ := url.Parse("https://api.apis.guru/v2/specs/telnyx.com/2.0.0/comments")
	q := baseURL.Query()
	q.Set("filter[comment_record_id]", "8ffb3622-7c6b-4ccc-b65f-7a3dc0099576")
	q.Set("filter[comment_record_type]", "sub_number_order")
	baseURL.RawQuery = q.Encode()
	targetURL := baseURL.String()
	req, _ := http.NewRequest("GET", targetURL, nil)

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}
require "net/http"
require "json"

uri = URI("https://api.apis.guru/v2/specs/telnyx.com/2.0.0/comments")
uri.query = URI.encode_www_form({
  "filter[comment_record_id]" => "8ffb3622-7c6b-4ccc-b65f-7a3dc0099576",
  "filter[comment_record_type]" => "sub_number_order"
})

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Get.new(uri)

res = http.request(req)
puts JSON.parse(res.body)
<?php
$url = "https://api.apis.guru/v2/specs/telnyx.com/2.0.0/comments?" . http_build_query([
    "filter[comment_record_id]" => "8ffb3622-7c6b-4ccc-b65f-7a3dc0099576",
    "filter[comment_record_type]" => "sub_number_order"
]);
$opts = ["http" => [
    "method" => "GET",
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗
  1. See official documentation for authentication and setup.

What can you build with Telnyx API?

Telnyx API is a Company API. Developers commonly use company APIs for:

  • enriching CRM records with company firmographics
  • building lead-generation and prospecting tools
  • verifying business identity and registration details
  • monitoring competitors and market intelligence
  • powering B2B data enrichment pipelines

No authentication required. This API is open — no signup or key needed. Ideal for quick prototypes and public-facing features. Telnyx API is free to use, making it a low-risk choice to experiment with.

New to APIs? Read our beginner's guide

Open documentation ↗