Carriers, MNOs & MVNOs
Wholesale voice and SMS, bilateral interconnection, roaming and signalling, A2P monetisation and number hosting - from a carrier that operates 600+ direct interconnects and 800+ SMS operator connections.
600+
Direct carrier interconnects
800+
SMS operator connections
6
Interconnect PoPs on three continents
How Dollu serves carriers, mnos & mvnos.
Dollu is a carrier's carrier. We hold direct bilateral voice interconnects with more than 600 operators, SMS connections into 800+ mobile networks and a switching core that carries over three billion minutes a year. Fixed and mobile operators, national incumbents, MVNOs and OTT providers use us to fill coverage gaps, add redundant supply on high-volume destinations, and buy A–Z termination on transparent per-destination rate decks with real-time quality statistics. Interconnection is over SIP at our London, Frankfurt, Amsterdam, Ashburn, Mumbai or Singapore PoPs, over private IP, or via TDM gateways where required.
On the messaging side we terminate wholesale A2P and P2P SMS, and we help operators turn A2P from a leakage problem into a revenue line. Our SMS firewall sits in front of your SMSC, classifies traffic by content and origin, blocks SIM farms and grey-route aggregators, and enforces commercial agreements so enterprise messages only reach subscribers over paid, registered channels. Combined with our hub, that means monetisation of international A2P traffic without the capital cost of building and staffing a firewall yourself.
Beyond voice and SMS we provide the services that let smaller operators and MVNOs behave like large ones: SS7 and Diameter signalling, IPX connectivity, sponsored and steered roaming, number range hosting, porting and international number supply. Everything is monitored from a 24×7 NOC, priced for wholesale volume, reported through a single portal and API, and managed by a dedicated carrier-relations team you can reach at [email protected].
What keeps communications and network teams up at night.
Route quality across hundreds of destinations
Maintaining bilateral routes to every destination is uneconomic. Operators need a wholesale partner that fills coverage gaps with direct routes, publishes per-route ASR, ACD and PDD, and does not silently downgrade traffic to cheaper hops.
Grey routes eroding A2P revenue
SIM farms, grey-route aggregators and spoofed sender IDs deliver enterprise messages onto your network without paying termination fees. Without a firewall and a monetisation strategy, A2P is a cost and a spam complaint rather than a revenue stream.
Roaming and signalling complexity
SS7 and Diameter interconnects, IPX peering, steering, sponsored roaming and IREG/TADIG testing for 4G and 5G roaming consume engineering time and capital that regional operators and MVNOs rarely have spare, yet subscribers expect seamless service abroad.
Number ranges, porting and hosting
Launching an MVNO or a new service line means number ranges, porting processes and hosted routing in each market - every one with its own regulator, numbering plan, format rules and timelines that a lean team struggles to track.
How we solve them.
Each solution maps to specific Dollu services - click through for full detail, specifications and FAQs.
Wholesale voice termination and origination
A–Z termination on Premium, Standard and Wholesale tiers, origination and DIDs in 110+ countries, bilateral swap and hubbing arrangements, and SIP or TDM interconnection at any of our PoPs with dual-homed capacity.
Wholesale SMS and A2P monetisation
SMPP and HTTP wholesale termination to 800+ networks, an SMS firewall in front of your SMSC that filters grey routes and enforces commercial agreements, and a hubbing model that pays you for terminated enterprise traffic.
Roaming, signalling and IPX
SS7 and Diameter signalling transport, IPX peering, roaming hub agreements, steering of roaming, sponsored roaming for MVNOs and IoT eSIM profiles that let your subscribers and devices attach abroad without bilateral negotiations.
Number hosting and porting
Hosted number ranges, mobile and geographic number supply in 110+ countries, porting projects managed against each regulator's process, and routing tables kept in sync so calls and messages reach the right network.
Quality and fraud management
Per-route quality scoring, automatic failover within tier, test-call and CLI-check tools, and real-time detection of IRSF, Wangiri and traffic pumping to protect both your subscribers and your interconnect settlement.
10–25%
Uplift in A2P termination revenue after firewall deployment
< 1 day
Typical time to a live SIP interconnect
99.99%
Switching core availability
230+
Destinations on direct or Tier-1 routes
Most used by carriers, mnos & mvnos customers.
- voice
Carrier Interconnection
Direct carrier-to-carrier interconnection: SIP and TDM handoff, PoP cross-connects, private IP interconnect and bilateral or swap agreements for licensed operators.
- voice
Wholesale Voice Termination
Direct-route international voice termination to 230+ destinations with CLI-guaranteed, standard and wholesale quality tiers, real-time QoS and 24×7 NOC.
- messaging
Wholesale SMS Termination
Wholesale SMS termination and hubbing for aggregators, carriers and OTTs: SMPP binds, per-country rate decks, verified DLR quality, route testing and high-TPS capacity.
- messaging
SMS Firewall & Messaging Security
SMS firewall and messaging security for operators and enterprises: grey-route, spoofing, smishing and SIM-farm/AIT detection, content filtering and A2P monetisation.
- mobility iot
International Roaming Services
Managed roaming for MNOs, MVNOs and IoT players: roaming hub, steering of roaming, TAP/BCE data and financial clearing, 5G and VoLTE roaming, testing and analytics.
- mobility iot
Signalling Services (SS7, Diameter, HTTP/2)
SS7, Diameter and 5G HTTP/2 signalling transport and hubbing with STP/DRA/SEPP, interworking, signalling firewall, HLR/HSS and number portability lookups over GRX/IPX.
Carriers, MNOs & MVNOs - common questions.
The questions customers and carriers ask us most often before they interconnect. If yours is not here, our team answers within one business day.
Still have a question?
Ask our solutions teamAlso serving.
- Banking & Financial Services
Carrier-grade OTP messaging, secure contact-centre voice and private connectivity for banks, insurers, NBFCs and fintechs - built for regulated traffic, audited networks and zero tolerance for downtime.
- Contact Centres & BPO
CLI-guaranteed outbound termination, inbound toll-free and DIDs in 100+ countries and a CCaaS stack that scales from 20 seats to 20,000 - for operators who live by answer rates and cost per minute.
- Healthcare & Life Sciences
Appointment reminders that cut no-shows, telehealth voice and video APIs, number masking that protects patient privacy and connectivity built for clinical uptime - with GDPR- and HIPAA-aligned controls.
- E-commerce & Retail
Order OTPs and shipping notifications at peak-season scale, WhatsApp and RCS engagement, delivery number masking, omnichannel support and store connectivity - one carrier across the whole customer journey.
- Travel, Hospitality & Logistics
Booking and gate-change alerts in any country, local numbers for every property and hub, IoT SIMs and fleet tracking across borders, and a contact centre that follows the sun.
- Media, Broadcast & Gaming
Contribution and distribution circuits for broadcasters, CDN and live-event connectivity, a low-latency 1.4 Tbps backbone, DDoS protection for game servers and voice and chat APIs for in-game communities.
- SaaS, ISVs & Startups
Voice, SMS, verify and video APIs on a carrier's own network, numbers in 110+ countries, white-label reselling and usage-based pricing - from your first sandbox call to your first hundred million.
Let’s talk about carriers, mnos & mvnos.
Speak to a specialist who has deployed these solutions in your sector. We will bring reference architectures and a commercial model to the first call.
