Why Simwood Carrier Services?

Stability and Availability

Our network is architected for stability and availability. Since we wholly own and operate our network, you will have shorter, more stable paths to your customers and your suppliers. We have a pathological hatred of network congestion and proactively upgrade infrastructure to maintain dramatic over-capacity and high availability. With three UK availability zones, two in the US, and traffic rerouting through any zone, the chances of our network going down is extraordinarily unlikely.

We put our money where our mouth is and provide the first 100% SLA on wholesale voice services. If we have an actual outage that means you cannot make calls out or receive calls in, we’ll pay you 25x the channel rental you paid during the period affected.

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Pioneering Engineers

At Simwood research and development is a big one. Not only are we on board with technological developments, our engineers help shape the future of the industry. Our team of pioneers speak at conferences and events around the world sharing the latest networking and development technologies, often 5 years ahead of our competitors. Our mission is to share these advancements with our customers as quickly as possible – we’ve built our business around the agility and ability to do this.

Keep up to date with the latest research, industry views, news and opinion at the authentically outspoken and daringly honest Simwood Blog


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Visibility and Protection

Fully included in every package is our smart and user-friendly portal and API, giving you ultimate visibility over all calls in progress and the ability to easily monitor call costs and configure fraud controls. Get real-time control over our services and treat our infrastructure as your own.

Our priority is to protect you from fraud and implement controls to stop the fraudulent activity before it affects our customers. Our honeypot enables us to view data from real-time attacks and proactively apply that knowledge to keep you protected from the latest security threats.



More about fraud

Numbering & Termination

Our geographically resilient, wholly owned SS7 interconnects and UK-wide numbering make Simwood the natural choice for wholesale-grade termination and inbound call-routing. Your customers can request and have live their desired number almost instantaneously. Our highly-advanced portal allows all porting requests to be submitted and managed seamlessly as well as inbound numbering easily allocated and configured, giving customers streamlined and real-time control over their call management. Add in geographic numbering from 50+ countries and you’ve got a solution that scales. And don’t worry if your numbers are elsewhere, we can host those for you too.

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Carrier Service SIP Trunking

As traditional copper-wire ISDNs become old news, our wholesale SIP Trunking solutions offer your customers a stable and simple stepping stone to next-generation communications, without having to replace their existing PBX. Our wholesale VoIP termination services are flexible, cost-effective and highly reliable; a game changer in the industry. Our network is built for voice traffic, so rest easy, your outbound traffic is our absolute priority. With our powerful portal you have complete control in managing sip trunks, setting custom limits per trunk and configuring fraud controls.

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Carrier Service IP Transit

At Simwood we are great advocates for direct connectivity to us in at least one site, due to the huge benefits of improved stability and performance for your voice traffic (amongst other reasons), regardless of what occurs on the wider internet. We’d love therefore to offer more customers the benefit of our IP transit to reach your customers and the wider internet. We offer IP transit in a number of different options including full and partial transit.

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Carrier Service SMS

Our cost-effective wholesale service SMS messages can be sent through our user-friendly portal or integrated directly with your platform using our powerful API. Simwood’s high-capacity network and industry-leading fraud protection controls make Simwood a no-brainer for your wholesale messaging. SMS are, broadly speaking, either P2P (person-to-person) or A2P (application-to-person) messages. A2P is usually commercial messaging such as chat bots, OTPs, marketing and appointment reminders whereas P2P is everyday messaging, human-to-human, and should not be consumed by businesses. It is worth being aware that there are implications if businesses break the terms and conditions of a P2P plan by using them for commercial activities rather than purchasing A2Ps.

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Carrier Service Connectivity

When it comes to connectivity, you have a huge range of highly tailorable options via direct connectivity, multi-site solutions and IP transit. In speeds from 10Mbps to 10Gbps nationwide, we can offer ultra-low-latency un-contended connectivity from your end-users back to our core. At Simwood, we offer connectivity at several different levels, layer 2 and layer 3, depending on your specific requirements. Our transit customers can benefit from our advanced VoIP fraud enhancement, a unique offering in the industry. We co-own a dark fibre ring around London which passes through all the major data centres, meaning that customers can have their own wave on this ring with breakouts into any of the data centres in its path.

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Simwood Intelligence

Our intelligence capabilities are both highly sensitive and infinitely revolutionary. Through our powerful APIs we have ground-breaking capabilities at identifying ‘red flags’ and nipping fraud in the bud before it gets a chance to escalate. With one of our customers screening two thirds of the world’s credit card transactions, it is our responsibility to ensure our fraud protection is world-class. Our intelligence services can be used in a whole range of different applications for our customers, for example vetting calls into a customer’s content-sensitive conference.

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Headline Carrier Service rates *subject to change

  • Developer

  • 0.00190
  • 0.00590
  • 0.00480
  • Start-Up

  • 0.00189
  • 0.00589
  • 0.00479
  • Virtual

  • 0.00180
  • 0.00582
  • 0.00450
  • Managed

  • Subject to Status
  • Subject to Status
  • Subject to Status

The above are an illustration of our current peak rates. Contact us for our full rate card

UK Mobile refers to the major UK MNOs; O2, Vodafone, EE, Three (H3G) and respective MVNOs,
some other ‘mobile’ network destinations may be charged at higher rates.

As an international carrier, we enable customers to operate their account in GBP, USD, or EUR.

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