DID Numbers
Direct inward dialling numbers in 110+ countries, delivered over SIP to any PBX, contact centre or platform - ordered in the portal or provisioned in seconds through the API.
110+
Countries with DIDs
8,000+
Cities and area codes
<60s
API activation, in-stock numbers
What is DID Numbers?
A DID (direct inward dialling) number is a phone number that lives in Dollu's network rather than on a physical line. Calls to it are answered by our geo-redundant switching core and delivered to you over SIP - to an on-premise PBX, a hosted UCaaS platform, a contact-centre dialler, a WebRTC endpoint or a plain PSTN forwarding number. Dollu holds DID inventory in more than 110 countries, sourced through our own operator licences and direct agreements with incumbents and alternative carriers.
Numbers are ordered from live inventory in the customer portal or through the Numbers API. Most in-stock numbers activate in under a minute; countries with regulatory checks activate once documents are approved, typically within one to three business days. You choose the number type - geographic, national, mobile or toll-free - the quantity, and the SIP trunk or URI to deliver to, and can change routing at any time without touching the number itself.
Every DID includes configurable inbound routing: primary and failover SIP destinations, ring-order and time-of-day rules, CLI presentation options, per-number channel limits and optional PSTN failover if your SIP endpoint is unreachable. Numbers can be voice-only, SMS-enabled or both where the country permits, and fax-to-email is available on selected ranges. Inbound calls are answered at the nearest of our 40+ PoPs and carried across our own backbone to your endpoint, keeping post-dial delay low and media quality consistent whether the number is in Frankfurt and the endpoint in Mumbai, or the other way round.
The service is built for both scale and precision. Platform providers order and release thousands of numbers a month through the API with sub-account isolation and white-label CDRs; enterprises manage a few hundred numbers across offices from a single portal with role-based access. Either way, you get one contract, one currency of your choice, one invoice and one 24×7 NOC for numbers in every country.
Inbound number flow: from the caller to your endpoint.
Why choose Dollu for did numbers.
The advantages of buying from a carrier that owns its network, interconnects and operations - rather than a reseller.
Global inventory from one supplier
Stop stitching together local carriers country by country. One agreement and one API cover DIDs in 110+ countries, with consistent SIP delivery and a single monthly invoice.
Numbers live in seconds, not weeks
In-stock numbers activate through the API in under a minute. Reserved inventory in high-demand countries means we rarely say no to a bulk order.
Regulatory work handled for you
Our compliance desk knows the address, KYC and end-user requirements of every country we serve and collects, validates and files the paperwork on your behalf.
Resilient inbound delivery
Geo-redundant switching, dual SIP destinations, automatic failover and optional PSTN fallback mean an inbound call is answered even when your primary endpoint is down.
Transparent, per-number pricing
Flat monthly rental plus per-minute inbound rates published per country in the portal, with volume tiers for platform customers and no hidden setup fees on standard ranges.
Capabilities in detail.
Everything included with DID Numbers - the platform features, options and controls you get from day one.
- 01
Numbers API and portal
Search inventory by country, area code or pattern, reserve, purchase, configure and release numbers via REST with webhooks for order and porting status. The portal offers the same functions with CSV bulk upload.
- 02
Flexible SIP delivery
Route each number to a SIP URI, a registered SIP trunk or a PSTN number. Deliver over public internet, TLS/SRTP, IPsec or a cross-connect at London, Frankfurt, Amsterdam, Ashburn, Mumbai or Singapore.
- 03
Inbound routing rules
Primary and secondary destinations, sequential or simultaneous ring, time-of-day and day-of-week schedules, holiday calendars and per-number failover to PSTN or voicemail-to-email.
- 04
Channel and capacity control
Assign 2, 10, 50 or unlimited concurrent channels per number or per trunk. Burst capacity for campaigns and seasonal peaks is available on request without changing numbers.
- 05
CLI and header handling
Configure P-Asserted-Identity, Diversion and custom SIP headers per trunk; pass the original caller ID or replace it with the DID for downstream systems that need it.
- 06
SMS and fax on DIDs
SMS-enabled DIDs in 40+ countries deliver inbound messages via webhook or SMPP; fax-to-email and T.38 pass-through on supported ranges.
- 07
Sub-accounts and white-label
Create sub-accounts with their own inventory, routing, users and CDRs. Platform providers can resell numbers under their own brand with rate mark-ups applied automatically.
- 08
Compliance and document management
Country-specific KYC forms, address proofs and end-user declarations are collected once and reused across orders; expiring documents trigger portal and email alerts.
- 09
Real-time CDRs and analytics
Per-number call volumes, answer rates, duration and geographic origin in dashboards and via SFTP or API export, with alerting on abnormal inbound patterns.
How it works.
From first conversation to live traffic - a tracked, engineer-led onboarding with a named owner at every step.
- Step 01
Choose numbers
Search live inventory by country, city or pattern in the portal or via API. Reserve numbers for up to 48 hours while you complete configuration or paperwork.
- Step 02
Submit documents
Where the country requires it, upload business registration and address proof once. Our compliance desk validates and files with the local operator or regulator.
- Step 03
Configure routing
Point each number at a SIP trunk, URI or PSTN destination, set failover, channel limits and schedules. Changes take effect immediately.
- Step 04
Go live and scale
Numbers activate as soon as inventory is released. Add, release or re-route numbers at any time; your account manager reviews utilisation and pricing quarterly.
Which number type fits.
Local, national, mobile, toll-free and short code numbers solve different problems - and carry different KYC and activation profiles. Availability by country is on the coverage matrix.
| Dimension | Local / geographic | National | Mobile | Toll-free | Short code |
|---|---|---|---|---|---|
| Typical use | Local presence, contact-centre inbound, outbound caller ID | Country-wide brand number without a city tie | Two-way SMS, WhatsApp and verification, mobile-first markets | Sales and service lines the caller should not pay for | High-volume A2P SMS, OTP and marketing opt-in |
| KYC burden | Low to medium; a local address is required in some countries | Low; company registration is usually enough | Medium to high; enhanced KYC and limited stock | Medium; a local entity in some countries | High; operator and regulator approval per code |
| SMS-capable | In selected countries (for example US, Canada, UK) | Rarely | Yes - two-way | In selected countries (US and Canada toll-free SMS) | Yes - the primary purpose |
| Caller pays? | Yes, at local rate | Yes, at national or geographic rate | Yes, at mobile rate | No - the number holder pays for inbound | Not applicable; inbound SMS charged at the sender’s standard rate |
| Activation time | Same day to a few days after KYC approval | Same day to a few days | Days; stock-dependent | Days; regulator registration in some countries | Weeks; carrier approval per country |
Who uses this and why.
Typical deployments across carriers, enterprises, platforms and contact centres.
UCaaS and CPaaS platforms
Provision numbers for your own customers through the API with sub-account isolation, white-label CDRs and automated release when subscriptions end.
Contact centres
Dedicated inbound numbers per campaign, client or region with high channel counts, IVR hand-off and detailed origin analytics.
Multinational enterprises
Give every office, department and executive a DID delivered to a central PBX or Teams tenant, managed from a single portal with role-based access.
SaaS and marketplaces
Assign a unique number to each merchant, listing or agent for call tracking, attribution and privacy without hardware or local contracts.
Marketing and call tracking
Spin up numbers per campaign, channel or ad group and measure inbound response through real-time CDRs and webhooks.
Technical & commercial specifications.
Key parameters at a glance. Ask us for the full service description and SLA document.
| Coverage | 110+ countries; 8,000+ cities and area codes |
|---|---|
| Number types | Geographic, national, mobile, toll-free, shared-cost (selected) |
| Delivery | SIP (RFC 3261) over UDP/TCP/TLS; SRTP; PSTN forwarding |
| Codecs | G.711a/u, G.729, G.722, Opus; T.38 on fax-capable ranges |
| Provisioning | REST API, webhooks, portal, CSV bulk upload |
| Activation | <60 s in-stock; 1–3 business days where documents required |
| Channels | 2 to unlimited concurrent calls per number or trunk |
| Billing | Monthly rental + per-minute inbound; USD/EUR/GBP/INR |
| Reporting | Real-time CDRs, per-number analytics, SFTP/API export |
| Support | 24×7 NOC; P1 response ≤ 15 min; named account manager |
How Numbers & DIDs are priced.
Numbers carry a per-number monthly rental set by country and type - local, national, mobile or toll-free - plus per-minute inbound usage. A few countries add a one-time setup or regulatory fee, passed through at cost.
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.
- Rental per number by country and number type
- Inbound usage per minute; toll-free usage by calling origin
- Bulk and committed-inventory discounts
- Porting priced per number or per project
- Free SIP delivery to your endpoint; no channel fees
- Billing
- Rental invoiced monthly in advance, usage in arrears; prepaid or postpaid
- Commitment
- None on standard inventory; committed inventory earns discounts
Numbers in 110+ countries.
Local numbers in 100+ countries, with national, mobile, toll-free and short-code ranges where the numbering plan allows. The countries below have a full guide - KYC, number types and activation times.
- Australia5/5
- Brazil4/5
- Canada3/5
- France5/5
- Germany5/5
- Hong Kong4/5
- India4/5
- Mexico3/5
- Netherlands5/5
- Philippines3/5
- Saudi Arabia4/5
- Singapore4/5
- South Africa5/5
- United Arab Emirates4/5
- United Kingdom5/5
- United States3/5
The figure on each chip is the number of types available out of those listed for the country; the remainder are on request.
DID Numbers - 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?
Ask our solutions teamRelated services.
Services customers commonly combine with DID Numbers.
Check inventory in your countries.
Send us the countries and cities you need and we will return availability, documentation requirements and pricing within one business day.
