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One of the most robust APIs available on the market.  FREE!
Our  API  has  you covered
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January 29th   -   February 1st 2019  ->   Booth 321
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Local Voice  -  Toll Free  -  International  -  SMS  -  e911  -  iFAX
SIP Trunks with QuestBlue
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Need a legacy Manhattan telephone number?   We have them!
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Backing You, In All You Do

Manage Service Providers

Grow your business without a volume commitment. Use our white label QuBe PBX and simplify your daily routine without your customers ever seeing or knowing of QuestBlue



Easily Deploy custom, high quality services across any size footprint. Adding additional locations as your company grows is as simple as it comes. We will proactively be there to support your growth every step of the way.


Hosted Voice

Utilize our cloud services as you run your business and we host your servers and routing.

Why the right provider is critical
Our Enterprises, carrier group service providers, managed service providers, and Reseller VoIP providers trust QuestBlue SIP trunking to deliver the highest quality and reliability to maintain their voice connections and keep them profitable around the globe.
The scalability of QuestBlue's network guarantees unlimited channel availability while giving you the power to manage your entire operation in real-time. Beginning is simple, you’ll be routing calls to QuestBlue in minutes with our instant SIP Trunk turn-up process from our easy to use portal or our extensive API. Need phone numbers? Not a problem with our worldwide selection of DIDs that will be routing by the time you select order in your user portal.
Why QuestBlue?

QuestBlue is compatible with any Sip endpoint, server, switch, or gateway. All of your services are delivered from the QuestBlue cloud via our high availablity data centers. Our system detects potentially dangerous and fraudulent traffic protecting you and your business. Your call quality is our priority. our technology ensures that your call goes directly to your destination without the middleman. QuestBlue offers tiered pricing with unbeatable market rates.

Free QuBe PBX with branding

If you have been searching for a quality GUI to Asterisk look no further! QuestBlue has released a GUI with all modules included for absolutely free. Yes, a robust, easy to use, and east to install PBX that you can download and install on your own hardware or host it in our cloud. We have you covered Remove the QuestBlue branding and replace it with your own when using QuestBlue SIP trunking for origination and termination! Imagine installing your own branded PBX, in your MSP program, with operator panels, built in assisted dialer, full point and click setup with fully supported updates. If you require an additional item in your PBX we will do our best to build it for you! The best part, is that we will build it, drop it into an update for all users, and the updates are all free!

The API difference
When it comes to our API we have Five 9's of API Success Rate. Our rate is the true indicator of your app's success. We won’t settle for errors that slow you down. If our API is missing something we will add it.
Every service with QuestBlue is part of our extensive worldwide network. SIP Trunks, origination, termination, instant provisioning of every service is available to you with our connections all over the globe.
Join the ever growing list of businesses who trust QuestBlue to deliver their communications.Award-winning support, with the ability to scale to your requirements with superior quality. Let our team become your team and trust that we will be here for you when you need us to be. 

Grow Your

Community Today

We take pride in helping launch MSPs voice services. 
We are the power behind some of the most well-known brands.
Do you fall into the Managed Service Provider (MSP) category?
We support you, and our PBX software that you can install
and service under your own brand.  Hosting your clients PBX in our cloud will strengthen your success.  Your end user will never know we exist as you grow your industry.
Only pay for what you use! Rates starting at $0.009/minute. Call volume brings greater discounts!
Local and toll free DIDs starting at $0.50/month. Volume accounts may be eligible for greater discounts! International DIDs also available for $14.95 per month.
Important parts of getting your system up and running, we offer full support of E911 and CNAM for all of our DIDs.
Our powerful API allows you to have total control over your account. Seamless integration into your system
With QuestBlue, you only pay for what you use. As you increase volume, our team will work with you to create volume discounts that serve your needs with no contractual agreement. 






QuestBlue is committed to providing the best PBX and VOIP / Enterprise SIP Trunking technology and support to serve your needs. Our advanced API is available to all accounts at no additional cost.

Since 2007, we have supplied our customers with more than just SIP trunks, PBX systems, or telephones.
We have been a business partner along with a trusted provider of comprehensive product lines and infrastructure solutions.

We have backed our services with a solid guarantee, fast and friendly services, and incredible sourcing capabilities.
Our mission is to listen to our client's specific needs and deliver high performance products through continuous product innovation and operational excellence. 

To this end, we operate out of a fully redundant data center to ensure you are provided service consistently and reliably.