The Estonian Phone Number Your e-Residency Company Still Needs (Now That Skype Is Gone)

I have been an Estonian e-resident since 2018. A while back I wrote about the ten outbound calls e-Residency never warns you about, and I closed that piece with a note that the inbound side was a post for another day. This is that post. It is shorter, and it is about a single field on a single form.

Here is the field. Somewhere between registering the OÜ and onboarding your third vendor, a screen asks you for a phone number. Not as an afterthought, but as a required box with a red asterisk. I remember the Estonia e-Business Register portal wants one for the company. A payment processor wants one before it will let money move. A B2B SaaS vendor wants one "for account security," which usually means a human will call it once to check you are real.

So you type in a number. And the first time you do it, you stop for a second, because the only number you have is a mobile in Tokyo, or Kuala Lumpur, or wherever you happen to be that month. It works. It also looks wrong. An Estonian company with a Japanese mobile on its registrar contact line is the paperwork equivalent of showing up to a Tallinn notary in beach sandals. Nothing is technically out of order. Everyone notices anyway.

The Field Nobody Warns You About

For years, the fix for this was Skype. You bought a Skype Number (they used to call it SkypeIn), picked Estonia from the list of countries that offered local numbers, and now you had a +372 number that rang on your laptop. You put it on the form. You forgot about it until something called it.

There is a quiet irony in that, and it is the kind of thing I cannot let pass. Skype was born in Tallinn in 2003. Three Estonian engineers wrote the software that became the country's first real tech giant and seeded half the founders who later built the digital state that sells you e-Residency. So the tool e-residents leaned on to hold an Estonian phone number for their Estonian company was, itself, the most Estonian software ever written. There was something fitting about that.

Then Microsoft retired Skype on 5 May 2025. The dial pad went, the numbers went, and porting them out was not really on the table. Estonia's first unicorn was switched off by its American owner, and a small, unglamorous job it had quietly done for thousands of e-residents went dark with it. The job did not disappear. The tool did.

Why the Number Should Be Estonian

Before the "what to use now" part, it is worth being precise about why the +372 matters, because half the people reading this will reasonably ask why any working number is not good enough.

It is not about the law. The Estonian register does not check the country code on your contact number. It is about everything the law does not cover.

1. It reads as local, because the company is. Your OÜ is an Estonian legal person with a Tallinn address and a registry code. A +372 number is the one detail on the page that agrees with all the others. A foreign mobile is the one that argues with them.
2. Some forms quietly expect it. Not "reject the foreign number" expect, but "the dropdown defaults to Estonia and the validator is happiest with +372" expect. Plenty of European vendor and KYB (know-your-business) flows are built by people who assumed an Estonian company has an Estonian number, and they are smoother when you do not fight that assumption.
3. When it gets dialled, it gets dialled from Estonia. The registrar, a local vendor, the occasional client who found you through the business register. The people most likely to ring an Estonian company's listed number are inside Estonia or the EU, and a local number is the one they can dial without thinking about international rates or whether the call will even connect.
4. It is stable. A number on a public register is a number that may sit there for years. You do not want it tied to a SIM you will cancel the next time you change countries.

Where a +372 Number Actually Earns Its Keep

These are the concrete spots, in my experience and from comparing notes with other founders, where having an Estonian number on hand stops being cosmetic and starts saving you an afternoon.

1. The company contact field on the registrar and in the public e-Business Register. Whatever you put here is what a counterparty sees when they look you up. It should be a number that reaches you and looks like it belongs.
2. Vendor and supplier onboarding. B2B SaaS, logistics, wholesale suppliers, the more serious payment processors. A surprising number still run a manual verification step where someone calls the number on file. If nobody picks up, your account sits in "pending" while you wonder why.
3. Payment and fintech KYB checks. Account-opening flows that want a phone number tied to the company, not your personal mobile, before they will switch the account on.
4. Marketplaces and directories. If you list the company anywhere (a B2B marketplace, an industry directory, your own website's contact page), a +372 number is the one that signals "real Estonian business" to a cautious buyer.
5. Being reachable on your own terms. This is the inbound mirror of the outbound calls piece. Once in a while the bank, the tax office, or a client wants to call you. A published Estonian number that forwards to whatever phone you are carrying means they can, without you handing out your personal mobile to strangers.

What an Estonian Number Like This Won't Do

I am going to be blunt here, because the alternative is letting you find out the expensive way.

A virtual Estonian number is a voice line. It is for being called and being reachable. It is not a master key to the Estonian digital state, and anyone who tells you otherwise is selling you something.

• It will not do your e-Residency authentication. Your digital identity runs on the e-Residency card or Smart-ID, not on a phone number. Signing into government services, signing documents, none of that touches your contact number.
• It will not give you Mobile-ID. Mobile-ID needs a special SIM from an Estonian mobile operator, tied to a verified Estonian identity. A forwarding number is not that, and never will be. Smart-ID is the route most e-residents use precisely because it does not need a SIM at all.
• It will probably not catch your bank's SMS codes. LHV, SEB and Swedbank tie one-time codes to a number linked to a verified identity, and they are increasingly cold towards numbers that look like internet telephony. Do not plan your banking 2FA around one.
• It is not for emergencies. This is a number for receiving business calls, not a line to 112. Same as I say about every virtual number we run.

If your honest need is "an Estonian number I can publish and be reached on," a virtual number is exactly right. If your need is "log into my bank and sign tax filings," that is the e-Residency card and Smart-ID, and no phone number replaces them.

The Throwaway-Number Trap

When Skype died, a wave of "free Estonian +372 number, receive SMS online" sites moved into the search results. I understand the temptation. They are free, they are instant, and they have a +372.

They are also the wrong tool, for one structural reason. Those numbers are shared. The inbox is public, the number has been used by a thousand people before you, and it is exactly the kind of number that fraud systems are trained to flag. It gets worse than a generic flag, too. I know for a fact that some services actively scrape the public lists these sites publish and blocklist the numbers outright, which means a registration can be bounced before a human ever looks at it. That alone is reason enough never to put one anywhere sensitive or security-related. Put one on your company registration or your payment processor and you are not saving five euros. You are pre-loading a problem into the one place where a problem is most annoying to unwind. And of course, none of them ring you. They catch a code in a browser tab and that is the whole act. They cannot be the number a vendor calls back.

A business number is the opposite of disposable. The entire value is that it is yours, it is stable, and it actually reaches you.

What I Use Now

When we built virtual numbers into PuchiDen, Estonia was one of the first countries I wanted on the list, for entirely selfish reasons. I needed one myself.

A PuchiDen Estonian number is a real +372 line that people can call. When someone dials it, the call forwards over the ordinary phone network to whatever phone you choose, your mobile in Tokyo, a landline, anything. The caller only ever sees the +372 number. The phone it actually rings stays private. There is no app for them to install and nothing for you to keep running. Your existing phone simply rings.

The honest parts:

• It is not free, and that is the point. An Estonian number starts at €6.00 a month, plus a one-time setup fee and per-minute charges only on calls that actually connect. The full breakdown lives in the virtual numbers guide, and I will not duplicate the table here. A few euros a month buys a number that is yours, that nobody else shares, and that rings your real phone.
• There is an identity check. PuchiDen normally lets you sign up with nothing but an email, no password, no phone number. Inbound numbers are regulated, so a virtual number is the one place we have to ask for ID. I do not love the tension, I am open about it, and it is also exactly why the number is the opposite of a throwaway: a real carrier number, provisioned to you, not pulled from a shared pool.

What to Actually Do

Short and opinionated, the way I like to end these.

1. Keep your e-Residency card and Smart-ID for everything that is actually authentication. Logging in, signing, filing. No phone number plays in that league.
2. Get one stable Estonian number for everything that is a contact field. The registrar, vendors, processors, your website. Publish that, not your personal mobile.
3. Skip the free shared +372 numbers. They cost nothing and they are worth exactly that on a company you intend to keep.
4. Forward it to whatever phone you are carrying this month. The whole shape of e-Residency is that you move. Your number should not care which country you woke up in.

Skype filled this field for a decade and then got switched off from Redmond. The field is still there on the form. I built the thing that fills it now, because I was tired of typing a Tokyo mobile into an Estonian company and hoping nobody would mind.