Colt Wholesale SIP
The digital infrastructure of choice for Cloud and OTT service providers who want to build, integrate and sell their own Cloud Voice, UCaaS and CCaaS solutions. Get carrier-grade SIP trunks for inbound/outbound calls and instant access to geographic and nomadic numbers in over 20 countries.
underpin your Cloud Voice, UCaaS + CCaaS solutions
Colt Wholesale SIP enables Cloud & OTT service providers to quickly and cost-effectively enter or expand into Europe without the need to invest in their own local VoIP infrastructure or manage multiple vendor relationships.
Service providers need to digitise and automate their operations in a highly competitive environment where agility, scalability, and regulatory compliance are crucial. Wholesale SIP APIs help ease the pressure to improve operational efficiency and reduce time-to-market for new and innovative Cloud Voice, UCaaS and CCaaS solutions.
rapid
expansion via colt's network
Efficient
delivery via apis
easy
leave vendor management to us
Trusted by the worlds leading companies
Benefits that empower progress
Related Insights
Why colt?
We deliver the extraordinary every day for our customers, people and partners. Here’s what sets us apart.
experience as a voice operator
Customer experience has always set us apart and our NPS score is one of the best in the industry.
Buildings connected
With Colt fibre and millions more available via our Colt Network as a Service platform across Europe, Asia and the US.
Data Centres
Unparalleled access to key infrastructure hubs, enabling seamless integration with cloud providers, carrier hotels and enterprise facilities.
FAQs
Wholesale SIP is Colt’s comprehensive solution for entering the wholesale voice market. It offers a fast, cost-efficient, and fully automated way to scale your business using Colt Voice APIs. It combines Colt’s technical, process, and regulatory expertise to support quick market entry and flexible growth.
Numbers on Demand is Colt’s B2B online interface built for managing large volumes of geographic numbers efficiently, with a consistent experience across Colt’s pan-European footprint. It allows you to reserve and activate numbers in real time, view your inventory, and make porting requests when you need to.
Yes. Colt Wholesale SIP uses next-generation REST APIs to enable customers to order new numbers and ports over API, and to manage their end-customer inventory across Colt’s European coverage. It is now even simpler thanks to the launch of the API developer portal, which allows customers to easily find information on the structures and rules of our APIs, as well as seamlessly test our APIs before launching them in production.
Colt streamlines the expansion of Cloud & OTT service providers by offering a standardised Pan-European SIP solution, which removes the complexity of dealing with multiple national operators by having Colt as your single point of contact and contract. Alongside the uniform user experience of our Numbers on Demand portal and APIs, we provide a consistent, high-quality voice service and customer experience across all your target markets.
Yes, Colt has over 25 years of in-country experience and ensures full compliance with local telecom regulations. This includes managing number porting, emergency call services, lawful interception, and directory services, so you can focus on growing your business without any regulatory concerns.
Absolutely. Colt provides online VoIP reporting and delivers standardised, unrated CDRs twice daily. This enables you to monitor call statistics and network performance in detail while also giving you the flexibility to bill your end-customers accurately and efficiently.
The extraordinary everyday.
By tackling the complexities and frustrations of the everyday, we take away the grind - making room for the extraordinary.
