A2P SMS (Enterprise Messaging)
Application-to-person SMS for OTPs, alerts, notifications and promotions - delivered over direct operator routes with registered sender IDs, DLT and 10DLC compliance, and SMPP or HTTP API integration.
800+
Operator connections
220+
Countries reachable
10k+
Messages per second
What is A2P SMS (Enterprise Messaging)?
Dollu's A2P SMS service lets your applications send text messages to mobile subscribers at scale - one-time passcodes, transaction alerts, appointment reminders, delivery notifications and opt-in promotional campaigns. Messages enter our platform over SMPP 3.4 binds, a REST/HTTP API, SMTP-to-SMS or the campaign portal, and are routed to the destination operator over direct or premium-grade connections chosen for delivery probability on that network, sender type and content class rather than for the lowest wholesale price.
We hold more than 800 operator connections across 220+ countries, including direct SMPP binds into the major mobile networks of India, the Gulf, South-East Asia, Africa, Europe and the Americas. Direct connectivity means your registered sender ID arrives intact, messages land within seconds and delivery receipts reflect real handset status rather than an intermediate hub's acknowledgement. Where a market mandates pre-registration - DLT in India, 10DLC in the United States, sender ID whitelisting across the Gulf and much of Asia - our compliance desk prepares and submits the entity, header and template registrations on your behalf.
Every route is scored continuously on delivery rate, latency and DLR accuracy, and the routing engine moves traffic automatically when a connection degrades. OTP and transactional traffic runs on separate high-priority queues from promotional traffic, so a ten-million-message campaign never delays a passcode. Two-way messaging is supported through long codes, short codes and virtual mobile numbers in 100+ countries, with inbound messages and keyword replies pushed to your webhook or SMPP receiver bind in real time.
The same platform serves a fintech sending 50,000 OTPs a day and a retailer sending 20 million promotional messages in a festive week. Sub-accounts, role-based access, per-account throughput and spend limits, and itemised billing per sender ID make it straightforward for enterprises, ISVs and SaaS providers to run messaging for several brands or business units from a single relationship - with a 24×7 NOC and a named account manager behind it.
A2P SMS path: from your application to the handset.
Why choose Dollu for a2p sms.
The advantages of buying from a carrier that owns its network, interconnects and operations - rather than a reseller.
Delivery you can measure
Per-country, per-operator and per-sender-ID delivery rates, latency percentiles and DLR reason codes in the portal and API, so you know exactly which messages arrived and why the others did not.
Compliance without the paperwork
Our compliance desk handles DLT entity and template registration in India, 10DLC brand and campaign vetting in the US and sender ID whitelisting in 40+ regulated markets, and keeps you informed of rule changes.
Your brand on every message
Registered alphanumeric sender IDs and dedicated numeric senders mean customers recognise you instantly, and route selection avoids paths that rewrite or strip the sender.
Scale without re-architecting
Throughput from a few hundred to more than 10,000 messages per second on the same binds, with burst handling for OTP peaks and festive campaigns and no re-integration as volumes grow.
One vendor for SMS, voice OTP and rich channels
Add voice OTP fallback, RCS, WhatsApp Business and virtual numbers on the same account, APIs and invoice as your SMS traffic.
Capabilities in detail.
Everything included with A2P SMS (Enterprise Messaging) - the platform features, options and controls you get from day one.
- 01
Direct and premium operator connectivity
Direct SMPP binds and premium-grade hub connections into 800+ operators, with route selection by destination, sender type (alphanumeric, numeric, short code) and content class.
- 02
Sender ID management
Registered alphanumeric sender IDs, dedicated long codes, shared and dedicated short codes and virtual mobile numbers, with per-country rules applied automatically before dispatch.
- 03
Regulatory and consent tooling
DLT header and template mapping, 10DLC brand and campaign registration, TCPA and GDPR consent records, STOP/START keyword handling and audit logs for every message.
- 04
SMPP 3.4 and HTTP APIs
Transmitter, receiver and transceiver binds with TLS; REST API with JSON payloads, batch sends up to 10,000 recipients per call, delivery webhooks and idempotency keys.
- 05
Campaign portal
Upload contact lists, personalise with merge fields, schedule by time zone, shorten and track URLs, manage opt-outs and export campaign reports without writing code.
- 06
Two-way messaging and keywords
Inbound SMS on long codes, short codes and virtual numbers in 100+ countries; keyword auto-responses, MO forwarding to webhooks or SMPP, and conversation threading in the portal.
- 07
Adaptive routing and failover
Real-time scoring of every route on delivery rate, latency and DLR accuracy; automatic re-routing on degradation, with sticky routing for OTP traffic to keep latency predictable.
- 08
Delivery receipts and analytics
Handset-level DLRs with standardised error codes, delivery latency histograms, per-operator conversion dashboards and scheduled report exports by CSV or API.
- 09
Throughput, throttling and sub-accounts
Per-bind and per-account TPS controls, message queuing with configurable validity periods, spend caps and sub-accounts with their own credentials, sender IDs and reporting.
How it works.
From first conversation to live traffic - a tracked, engineer-led onboarding with a named owner at every step.
- Step 01
Onboard
Complete KYC and tell us your use cases, destination countries and expected volumes. We provision your account, API credentials and portal access the same day.
- Step 02
Register senders
Our compliance desk registers your sender IDs and templates - DLT in India, 10DLC in the US and whitelisting where required - and confirms which senders are live per country.
- Step 03
Integrate and test
Bind over SMPP or call the REST API, send test messages to our handset lab numbers in 60+ countries and confirm encoding, sender presentation and DLR handling.
- Step 04
Send and optimise
Go live with throughput and spend limits in place. Review delivery analytics with your account manager and tune routes, templates and send windows for conversion.
Direct, premium or grey.
Where an SMS route class shows up: in delivery, in the sender ID your customer sees, in the truthfulness of the delivery receipt and in the compliance risk you carry.
| Dimension | Direct operator | Premium aggregated | Grey routesNot offered by Dollu |
|---|---|---|---|
| Delivery | Direct SMPP bind to the mobile operator; the highest and most consistent delivery | Via a vetted hub or Tier-1 aggregator holding operator agreements; high delivery with occasional re-routing | Via SIM farms or unauthorised international paths; unpredictable, filtered and blocked without notice |
| Sender ID | Registered alphanumeric ID, short code or long number preserved exactly | Registered sender ID normally preserved; may be substituted on a few destinations | Overwritten with a random numeric sender; your brand is invisible |
| DLR quality | Handset delivery receipts from the operator | Operator or hub receipts; reliable, occasionally delayed | Fake or aggregator-generated receipts; no proof of delivery |
| Compliance risk | Lowest - operator-approved, with DLT, 10DLC or sender-ID registration completed up front | Low - operator agreements in place; Dollu vets every hub it uses | High - breaches operator terms and local law; carries fines, blacklisting and lost sender IDs |
| Price position | Highest per message; the lowest cost per delivered, verified message | Mid | Lowest headline price; the hidden cost is failed OTPs, blocked traffic and brand damage |
Dollu does not sell grey routes. Every destination on our deck is direct operator or premium aggregated, and the route class is shown against each price so you know exactly what you are buying.
Who uses this and why.
Typical deployments across carriers, enterprises, platforms and contact centres.
Banks and fintechs
OTPs, transaction alerts and fraud notifications on high-priority routes with registered senders and DLT-compliant templates.
E-commerce and logistics
Order confirmations, delivery updates and two-way rescheduling on virtual numbers, plus opt-in promotional campaigns at festive peaks.
Healthcare providers
Appointment reminders, test-result notifications and follow-up messages with consent tracking and audit trails.
SaaS and ISVs
Embed messaging in your product with sub-accounts, white-label reporting and per-tenant sender IDs and billing.
Government and utilities
Bill reminders, outage notifications and public advisories to millions of citizens with throughput guarantees and priority queues.
Technical & commercial specifications.
Key parameters at a glance. Ask us for the full service description and SLA document.
| Coverage | 220+ countries and territories; 800+ operator connections |
|---|---|
| Connectivity | SMPP 3.4 (TLS optional), REST/HTTP API, SMTP-to-SMS, web portal |
| Throughput | From 50 to 10,000+ messages per second per account |
| Sender types | Alphanumeric, numeric long code, short code, virtual mobile number |
| Encoding | GSM-7 and UCS-2 (Unicode); concatenation up to 10 segments |
| Delivery receipts | Handset-level DLRs via SMPP deliver_sm or HTTP webhook |
| Compliance | DLT (India), 10DLC (US), TCPA, GDPR, per-country sender ID rules |
| Two-way | MO on long codes, short codes and VMNs in 100+ countries |
| Billing | Per submitted or delivered message by destination; prepaid or postpaid |
| Support | 24×7 NOC; P1 response ≤ 15 min; named account manager |
How Messaging is priced.
A2P, OTP and promotional SMS are priced per message by destination and route class - direct operator or premium aggregated. Wholesale SMPP decks for aggregators; RCS and WhatsApp per conversation or session.
We publish the model, not a public rate card - actual rates depend on destination, route class, volume and regulatory cost. See how every Dollu service is priced.
- Direct-operator and premium route tiers per destination
- Sender ID and DLT registration assistance included
- Volume-based discounts by monthly message count
- Two-way inbound priced per number
- RCS and WhatsApp Business per conversation or session
- Billing
- Per submitted message, itemised by destination and route; prepaid or postpaid
- Commitment
- None - month-to-month; volume commitments unlock better tiers
220+ destinations, 800+ operator connections.
Direct operator binds and premium aggregated routes into every major mobile network. Country guides explain the sender-ID rules, KYC and route options in the markets we are asked about most.
- Australia+61
- Brazil+55
- Canada+1
- France+33
- Germany+49
- Hong Kong+852
- India+91
- Mexico+52
- Netherlands+31
- Philippines+63
- Saudi Arabia+966
- Singapore+65
- South Africa+27
- United Arab Emirates+971
- United Kingdom+44
- United States+1
Sender-ID registration markets
In these destinations A2P traffic is scrubbed unless the sender is pre-registered. Dollu’s compliance desk prepares and submits the registrations before your first message.
- IndiaDLT entity, header and template registration
- UAESender IDs registered with e& and du under TDRA rules
- Saudi ArabiaSender IDs registered with stc, Mobily and Zain under CST rules
- SingaporeSMS Sender ID Registry (SSIR); UEN required
- PhilippinesSender-ID whitelisting with Globe, Smart and DITO
- United States10DLC brand and campaign registration
A2P SMS - your questions answered.
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?
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Services customers commonly combine with A2P SMS (Enterprise Messaging).
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Tell us your destination countries, sender IDs and monthly volume and we will return pricing, test credentials and a registration checklist within one business day.
