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New: BD, IN and PK Voice OTP capacity now live, test routes issued same day.

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Direct routes live in BD · IN · PK

Direct A2P SMS and Voice OTP routes that actually deliver

Wholesale A2P SMS and Voice OTP routes for telecom operators, CPaaS platforms and enterprise messaging companies. Direct operator connectivity, the route type stated per destination, and a funded test account in your hands the same business day.

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  • Direct operator routes, no grey traffic
  • SMPP, HTTP API and SIP on one account
  • 24/7 NOC with a named account engineer

This month

Hot destinations

Live
  • Bangladesh VOICE OTP Free test credit
  • India A2P SMS · DLT DLT setup handled
  • Pakistan VOICE OTP · CLI New capacity
  • United Arab Emirates A2P SMS Sender ID included
  • Nigeria TTS VOICE Bulk rate on request
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Route types shown; ask us for current delivery figures All destinations

Built for Telecom operators CPaaS platforms SMS aggregators Fintech & banking Call centres & IVR

What we route

Six wholesale routing products, one commercial relationship

Every product below runs on the same interconnects, the same monitoring and the same account team. Add a second product and nothing about your integration changes.

Compare all services

Direct A2P SMS Routes

Direct operator A2P SMS routes for OTP, alerts and transactional traffic, with real DLR and per-destination sender ID handling.

  • Direct routes live
Explore A2P SMS

Voice OTP Routes

Direct voice OTP routes for fintech and identity platforms, including markets where SMS OTP is filtered or delayed.

  • BD · IN · PK live
Explore Voice OTP

TTS Voice Routes

Text-to-speech voice routes for alerts, reminders and bulk notification, with concurrency sized to your campaign window.

Bulk capacity available
Explore TTS Voice

Why operators stay

Wholesale routing is a trust business. Here is how we earn it.

Anyone can quote a rate. What separates a supplier you keep from one you test and drop is whether the numbers hold at 2am on the last Thursday of the month.

Test it yourself

Who runs these interconnects

  1. Direct interconnects, declared honestly

    We tell you which routes are direct operator and which are transit, per destination, before you send a message. No route is sold as something it is not.

  2. Delivery data you can audit

    Real-time DLR, ASR and PDD in your portal, exportable as CDRs. If a number stops matching what we promised, you will see it before we do.

  3. Compliance-first traffic policy

    Sender ID registration, DLT handling and local content rules are part of onboarding, not an afterthought. We refuse traffic that puts your interconnects at risk.

  4. Automatic failover between carriers

    Each destination carries a primary and at least one standby route. Degradation triggers a reroute in seconds, not at the end of a support ticket.

  5. A NOC that answers, at 3am

    One escalation path, staffed around the clock, with an engineer who already knows your account and your traffic pattern.

  6. Wholesale pricing without a lock-in

    Volume-tiered rates, prepaid or postpaid, no minimum term. If a rate stops being competitive, tell us; we would rather re-price than lose the traffic.

Route coverage

Know exactly what is live before you integrate

Coverage is published per destination and per product, with the routing type stated. Search for the market you care about, if it is not listed, ask, because capacity changes weekly.

Open the coverage explorer
Per-product status

SMS, Voice OTP, TTS and termination tracked separately, because a country being open for one says nothing about the others.

Sender ID rules

DLT, pre-registration and alphanumeric support noted per destination, so nothing surprises you at go-live.

Operators reachable

The networks we terminate to, named, so you can check them against your own traffic mix.

Route availability by destination
Destination Dial / MCC A2P SMS Voice OTP TTS voice Termination
Bangladesh +880 · 470 Live Live Live Live
India +91 · 404 / 405 Live Live On request On request
Pakistan +92 · 410 Live Live On request Live
Nepal +977 · 429 On request Live On request On request
Sri Lanka +94 · 413 On request Live On request On request
Indonesia +62 · 510 Live On request On request On request
Philippines +63 · 515 Live On request On request On request
Vietnam +84 · 452 On request On request No On request
Malaysia +60 · 502 Live On request On request On request
United Arab Emirates +971 · 424 Live On request No On request
Saudi Arabia +966 · 420 Live On request No On request
Oman +968 · 422 On request On request No On request
Qatar +974 · 427 On request On request No On request
Egypt +20 · 602 On request On request On request On request
Nigeria +234 · 621 Live On request Live On request
Kenya +254 · 639 On request On request On request On request
South Africa +27 · 655 On request On request No On request
Turkey +90 · 286 On request On request No On request
United Kingdom +44 · 234 Live On request No On request
United States +1 · 310 On request On request No On request

See every destination and its routing type

Connect

Bind however your platform already works

One account, one balance, one set of credentials. Choose the protocol that suits your stack and change it later without renegotiating anything.

All connection methods

An SMPP v3.4 bind is the standard way to move A2P SMS at volume. Transmitter, receiver or transceiver, with real end-to-end delivery receipts.

Bind types
Transmitter, receiver, transceiver
Encoding
GSM 03.38, UCS-2, concatenated / long SMS
Delivery receipts
End-to-end DLR on the same session
Authentication
System ID, password and IP allow-list
Full SMPP v3.4 bind reference

A straightforward HTTP REST API in JSON, for teams that would rather not run a persistent SMPP session. Same routes, same balance, same receipts.

Transport
HTTPS, TLS 1.2 or above
Format
JSON request and response
Authentication
API key, optionally pinned to an IP allow-list
Callbacks
Delivery receipts pushed to your webhook, or polled
Full HTTP REST API reference
Example request 
POST /v1/messages HTTP/1.1
Host: api.sisbird.com
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json

{
  "to": "+8801XXXXXXXXX",
  "from": "SISBIRD",
  "text": "Your verification code is 472915",
  "type": "otp",
  "callback_url": "https://your-platform.example/dlr"
}

A SIP interconnect for voice termination, Voice OTP and TTS, with an engineer on the call for interop.

Signalling
SIP over UDP or TCP
Media
RTP, G.711 A-law / µ-law and G.729
Authentication
Static IP or digest
DTMF
RFC 2833
Full SIP interconnect reference

IP authentication instead of credentials: authenticate by source address, for platforms with fixed egress IPs.

Applies to
SMPP, HTTP API and SIP
Configuration
Allow-list of your egress addresses
Changes
Handled by the NOC, usually same day
Combined with
Credentials, for defence in depth
Full IP authentication reference

Onboarding

From first message to live traffic in four steps

Start step one

  1. Tell us the traffic

    Destinations, monthly volume, message or call type, and what you are paying today. Fifteen minutes on a call is usually enough.

  2. Get a costed route plan

    We come back with the route type per destination, the rate, and the delivery numbers we expect, in writing, before any commitment.

  3. Test on real capacity

    A funded test account on the same routes production will use. Test credits are on us. You verify the numbers yourself.

  4. Scale with a named engineer

    Go live, ramp volume, and keep the same technical contact who ran your test. Reviews monthly, escalation 24/7.

Before you ask

The questions buyers actually open with

Something not answered here?

A routing engineer replies, usually the same business day.

Ask us directly
Who does SisBird sell to?

Licensed telecom operators, CPaaS platforms, SMS aggregators, VoIP resellers and enterprises with their own messaging or voice platform. We supply wholesale routing, not a retail sending tool, so there is always an integration involved.

How quickly can I start testing?

A test account is usually issued within one business day of the route plan being agreed. Destinations that require sender ID or template registration take as long as the local regulator does, and we will tell you the realistic timeline before you plan a launch around it.

Do you charge for test traffic?

No. Test credits are on us, on the same routes production will use. Testing on a route you will not actually be given is not a test.

Is there a minimum commitment?

No minimum term and no setup fee. Rates are volume-tiered, so higher sustained volume earns a better rate, but nothing obliges you to reach it.

Do you sell grey routes?

No. Grey routes are cheaper right up until the operator closes them, your sender ID is blacklisted and your traffic stops without warning. Every route we sell is one we are prepared to name and label.

What happens when a route degrades?

Each destination carries a primary interconnect and at least one qualified standby. Degradation triggers an automatic reroute while the NOC investigates, and you are told what happened rather than left to infer it from your own dashboards.

Can I use several products on one account?

Yes. A2P SMS, Voice OTP, TTS and voice termination share one account, one balance and one set of reports. Adding a product does not change your existing integration.

What traffic will you refuse?

Unsolicited bulk messaging, traffic that misrepresents its sender, anything targeting numbers without a lawful basis, and anything that would put our interconnects or your own sender reputation at risk. We would rather turn traffic away than lose a route.

Read every wholesale routing question we are asked

Industry guides

Field notes from the routing desk

Practical writing on delivery, latency, compliance and interconnect quality, the parts of this industry that decide whether a route is worth buying.

Read all insights
  1. A2P SMS

    How to Test a Wholesale SMS Route

    A rate sheet tells you the price, not whether the message arrives. Here is what to agree before a test route is issued, the eight things…

     5 min
  2. A2P SMS

    How Wholesale A2P SMS Pricing Works

    Why two suppliers quote the same destination at very different rates, what actually sits inside a per-message price,…

     4 min
  3. A2P SMS

    What Are A2P SMS Routes? Direct vs Grey Routing Explained

    A2P SMS routes decide your delivery rate, your latency and whether your sender ID survives. Here is how…

     4 min

Start in 24 hours

Test a live route before you commit a single dollar

Send us your destinations and traffic profile. We return a costed route plan and a free test account, usually the same business day.

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