Resources
DID & virtual number guides
Plain-English explainers for telecom, IT and operations buyers — what these numbers are, how they differ, and how they work with your systems. No prices, no jargon; live rates are in the portal.
Start here
The fundamentals
Three short reads that cover the terms most buyers get stuck on.
What is a DID number?
Direct Inward Dialing explained — how a DID reaches your phone system, where the term comes from, and how it differs from an extension.
GlossaryWhat is a virtual phone number?
A cloud number, defined — how routing works, why it needs no SIM or line, and what businesses use virtual numbers for.
ComparisonDID vs virtual numbers
Are they the same thing? The terminology settled, plus a comparison of local, national, toll-free and mobile — and when to choose each.
Buying & connecting
Choosing and getting a number
Practical guides for the buying decision and the setup that follows.
How to choose a DID / virtual number provider
A scoring checklist you can apply to any vendor — coverage, KYC handling, SIP delivery, porting, billing model and support.
How-toHow to get a DID number, step by step
Five steps from choosing a country and number type to connecting the number and placing your first live call.
Working with numbers
Routing and compliance
How numbers reach your systems, and the verification behind them.
How DID numbers work with SIP trunking
The call path in words — from PSTN caller to a SIP INVITE your PBX routes. Trunk vs registration, and one number to many extensions.
RegulatoryVirtual number regulations & KYC explained
Why documents are asked for, how ranges are allocated, and the requirement classes to expect by market — described at industry level.
Go deeper
Guides and comparisons
The full picture for buyers, platforms and resellers.
Virtual numbers for AI voice agents
Why an AI agent needs a phone number, how a call reaches it over SIP, the ways to connect any platform (BYOC), local numbers in many countries, and the real limits.
How-toConnect your AI agent over SIP (BYOC)
Five steps to give an agent a real number: get a DID, authorise by IP or credentials, point the trunk at your platform, map the number, and test — with per-platform notes.
TroubleshootingSIP issues that break AI voice agents
One-way audio, codec mismatches, broken DTMF, latency and authentication failures — the predictable faults behind agent call problems, and how to fix each.
GuideLocal numbers for AI voice agents
Why a local caller ID lifts answer rates, which number type to choose per market, and how one agent presents a local presence across many countries.
GuideCost of numbers for AI voice agents
The parts that make up the bill — number rental, per-minute usage, number type, concurrency, verification and porting — so you can estimate spend honestly.
GuideDID numbers for business: the complete guide
Definition to how-it-works to types to honest limitations to setup — the full picture in one read, including the drawbacks most guides skip.
ComparisonToll-free vs local numbers: which to buy
Who bears the call cost, how callers perceive each, and which to choose for presence, support or sales.
CommercialWholesale DID numbers explained
What wholesale numbering is, who buys it — resellers, contact centres, CPaaS builders — and how it differs from retail.
Ready to get numbers?
Browse live country coverage, or tell us your markets and we'll confirm availability — usually within one business day.