Entreprise-class SIP Trunking provider

Pay as you go. Global network. Direct routes. Adaptive prices.

SIP Trunking & IAX

Our SIP & IAX solutions are world-class. We offer features such as elastic trunking, instant provisioning, direct interconnections and secured connections. Whether you are a call center with 25 or 200 agents, we can meet all of your SIP enterprise needs for call termination and origination.
We use the following major Codecs G.729, G.711A – PCMA and G.711U – PCMU and are compatible with all major VoIP softwares: Asterisk, Freeswitch, Vicidial, FreePBX...

SIP trunk - A datacenter linked to four phones

Cost-efficient global coverage

As a registered carrier, we benefit from direct fiber interconnection with top tier 1 carriers to provide you reliable service in over 220 countries. And regardless where your business, call center, or BPO is located, we can provide you access with localized numbers and network access.
Be it for outbound or inbound, we address all your calling needs. Thanks to our smart routing system, we are able to offer competitive prices that decrease with your volume of calls.

a world map with CALLR's data centers

Reactive support and security

Our SIP & IAX network is global. We can provide you reliable service with local interconnection through data centers wherever your network is located. Reliability is essential and that is why we only use top tier network companies and provide round the clock customer service. You can easily reach our customer support team, they give you a personalized, acute and timely assistance.

a phone with a clock next to it

Go further with our API

For a more sophisticated call experience, connect to our API to go beyond call termination: create scenarios for incoming calls using Interactive Voice Response (IVR), acquire and attribute numbers automatically, and much more. Get deeper insights with data concerning hang-up sources, call duration, recordings and other key metrics... SIP Trunking, supercharged.

SIP trunk - A terminal window opened with example of code on the background. An illustration with a server in a dialog bow forefront

All the features you need for a custom call experience 

realtime

Real-time Call Control

We allow you to build a fully customisable phone experience with real-time routing, recording, voicemail, audio play and more. Initiate, receive and control calls to enrich your business workflows.

shortcode

Shortcode and Long Virtual Number

For your business, you can choose between a shortcode (4 or 5 digits) and long virtual number for 2-WAY messaging. Local limitations may apply.

webhook

Webhooks

We provide webhooks in the form of HTTP POST (JSON payload) for all kinds of trigger events (SMS delivery reports, call statuses, billing) so that you can safely build a real-time experience for your users.

record

Call Recording

All calls can be recorded so you can keep record of conversations and improve quality of service.

detect voicemail

Voicemail Detection

We detect voicemail so you can focus on calling people who are present and you can actually talk to.

cdr

Call Detailed Report (CDR)

We provide the calls' raw data: caller (CLI) and callee numbers, duration, who hung up, hangup cause code, cost of the call, etc.

High quality SIP Trunking provider with low prices

I want to call:

Voice (Billing is per second)

Inbound

$ /min

Number

$ /num/month

Outbound (landline)

$ /min

Outbound (mobile)

$ /min

SMS

Inbound

$ /sms

Outbound

$ /sms

Bulk prices apply for high volumes of texts/calls

Contact us for more information

SIP Trunking Provider with a flexible API

Features callr-logo
Real time call control (via Webhooks)
Interactive Voice Response (IVR)
Buy and assign number automatically (API)
Call Recording
CDR available via Webhooks (integration with third party applications)
Supported implementations SIP Trunking, Registrar SIP and IAX
Documentation and SDKs available in PHP, Python, Ruby, JavaScript, Go, C#

We’re very happy with CALLR – in 3 years we’ve never had a major problem, and their support team is extremely reactive.

Vincent Kraus

Co-Founder of SeniorAdom

More than just SIP trunking thanks to our API

IVR, Call Tracking, Number Allocation... One-API-stop for all your needs

Our API handles all your needs: buy and allocate numbers, control calls in real-time, design custom IVR diagram to handle inbound calls, create SMS or voice notifications for your apps and fetch detailed analytics of all the actions you undertook with our API... Use webhooks for efficient, event-triggered implementations

  • PHP
  • JavaScript
  • Python
  • Ruby

Copied!

// composer require 'callr/sdk-php:dev-master' require 'vendor/autoload.php'; $api = new \CALLR\API\Client; $api->setAuthCredentials('login', 'password'); $target = (object) [ 'number' => '+16469820800', 'timeout' => 30 ]; $messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call. good bye.']; $result = $api->call('calls.broadcast_1', [$target, $messages, null]);
// composer require 'callr/sdk-php:dev-master'

require 'vendor/autoload.php';

$api = new \CALLR\API\Client;
$api->setAuthCredentials('login', 'password');

$target = (object) [
  'number' => '+16469820800',
  'timeout' => 30
];

$messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call. good bye.'];

$result = $api->call('calls.broadcast_1', [$target, $messages, null]);
// npm install callr var callr = require('callr'); var api = new callr.api('login', 'password'); var target = { number: '+16469820800', timeout: 30 }; var messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call! good bye.']; api.call('calls.broadcast_1', target, messages, null).success(function(result) { // });
// npm install callr

var callr = require('callr');
var api = new callr.api('login', 'password');

var target = {
    number: '+16469820800',
    timeout: 30
};

var messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call! good bye.'];

api.call('calls.broadcast_1', target, messages, null).success(function(result) {
    //
});
# pip install callr import callr api = callr.Api("login", "password") target = { 'number': '+16469820800', 'timeout': 30 } messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call. good bye.'] result = api.call('calls.broadcast_1', target, messages, None)
# pip install callr

import callr
api = callr.Api("login", "password")

target = {
    'number': '+16469820800',
    'timeout': 30
}

messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call. good bye.']

result = api.call('calls.broadcast_1', target, messages, None)
# gem install callr require 'callr' api = CALLR::Api.new('login', 'password') target = { :number => '+33123456789', :timeout => 30 } messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call. good bye.'] result = api.call('calls.broadcast_1', target, messages, nil)
# gem install callr

require 'callr'
api = CALLR::Api.new('login', 'password')

target = {
    :number => '+33123456789',
    :timeout => 30
}

messages = ['TTS|TTS_EN-GB_SERENA|Hello world! how are you? I hope you enjoy this call. good bye.']

result = api.call('calls.broadcast_1', target, messages, nil)

They trust us

Build your SIP trunking infrastructure with a dependable partner

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Carrier grade quality

As a carrier, we operate our own infrastructure and routes in Europe and an interconnection network with tier 1 carriers in the rest of the world. This ensures complete control over the quality of the traffic we provide for all our customers.

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Reliable partner

In 6 years, we've built and maintained a reliable and innovative worldwide network. Thanks to our efficient infrastructure and routing system, we’re able to offer both competitive pricing and premium quality.

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Global network

With points of presence around the world, reach more than 220 countries with unparalleled call quality. Break into new countries and smoothly scale up existing infrastructures with our powerful network.