We cannot call that destination

An internet call has to leave the internet somewhere. At the point it reaches an actual telephone, it is being carried by a licensed operator in that country, under a commercial agreement with whoever is passing the call to them. That agreement is what a rate is: a price per minute to hand a call to a specific range of numbers in a specific country. Where no such arrangement exists, there is no route and no price, and a call has nowhere to go.

Routes also close. Operators withdraw ranges, wholesale carriers stop serving markets they cannot make money in, and regulators restrict traffic in both directions. When a route closes, the honest response is to stop selling calls to it — which is what the app does, and why the served list is shorter than the list of countries in the world.

There is a second, less obvious reason a specific number can be refused within a country we do serve. Rates are quoted against number ranges, not against countries, and a country's mobile ranges, landline ranges and special ranges can each be priced or refused separately. So a landline in a country may connect while a particular mobile range in the same country does not. The app checks the specific number, not just the country code, which is why it can tell you before you dial rather than after.

There is no workaround inside the app, and anything that looks like one is worth being suspicious of. What there is, is a short list of practical alternatives.

Check whether a different number for the same person works. Because ranges are priced separately, a landline may be reachable when a mobile is not, or the other way round. If you have both, try both.

Use an app-to-app call where the other person can install something. Calls that never touch the telephone network are not subject to any of this, which is why messengers reach places a calling service cannot. The trade-off is that both sides need the same app and a data connection — a comparison of what each kind of service can actually do is on the comparison matrix.

Check back. The destination list is derived from the carrier's own price sheet on every build of this site, so the rates page is current rather than a snapshot somebody remembered to update. If a route opens, it appears there without an announcement.

You may find a country with a published figure that the app nonetheless refuses. This is deliberate and worth explaining, because it looks like a contradiction.

When the underlying carrier changed, the set of destinations that could be terminated to shrank sharply while the reference pages for the wider set stayed up. Those pages carry their previous figures and are marked as unavailable rather than being deleted, because a page that quietly disappears is worse for someone looking for information about calling that country than a page that says plainly it cannot be called today.

The app is the authority on what can be dialled, and it is the app that refuses. The site tells you what a destination costs where we serve it and says so where we do not. If you find a page that appears to promise a call we will not place, that is a mistake worth telling us about at [email protected] — the two are generated from one file and should never disagree.

A route exists because two companies have an agreement about a range of numbers, and agreements end. Wholesale carriers withdraw from markets where the economics stop working, operators reprice ranges, regulators restrict traffic in either direction, and fraud in a corridor closes it for everybody. None of that is announced in advance to a consumer app.

We have been through this at a scale worth describing. In August 2026 the carrier behind this service changed, and the set of destinations that could be terminated to changed with it — sharply, in both directions. The United Kingdom went from the most expensive destination on the price sheet to the cheapest; India went the other way. If the site had been carrying a hand-written list of destinations and a hand-written promise about coverage, both would have been wrong the same day and nobody would have noticed for weeks.

So the site does not carry a promise. It carries a list generated from the carrier's own price sheet on every build, which is why the rates page is the current answer rather than a remembered one, and why the app and the site cannot disagree about what can be dialled. It is less reassuring than a marketing claim and it has the advantage of being true.

The practical consequence for you is simple: check rather than assume, and check again if a destination mattered enough to plan around. There is no notification list to join because a route can open on any build.