WhatsApp Business with a landline number – step by step
Your landline is on your website, your shop sign and your invoices. Customers should reach you on WhatsApp under that same number – without anyone carrying a work phone around. That works. Only the verification code tends to cause trouble: it arrives by phone call, and your phone system likes to answer it. Below are the steps for the app and for a shared inbox, the fix for the phone-system problem and a checklist.
A landline works in the WhatsApp Business app and on Meta’s WhatsApp Business Platform (shared inbox), not in WhatsApp Messenger. You get the 6-digit code by voice call: an automated voice reads it out. The most common problem is a phone system with a greeting or menu – WhatsApp’s call can’t navigate a menu. Route the number straight to a phone for that one call.
Checklist before the verification call
- Number without an extension and without a 0 in front – WhatsApp needs the main number.
- The number accepts calls, including international calls. If your system blocks calls from abroad, the code call may not get through.
- No menu, no greeting, no forwarding to voicemail for this call – the number rings straight on a phone.
- Call blocking and blocker apps off (per WhatsApp’s help centre).
- The number isn’t active in another WhatsApp app. Delete it there first – or, in a shared inbox, choose “keep the app”.
- Someone is at the phone with pen and paper. Don’t guess the code.
Option A: in the WhatsApp Business app
The app runs on a smartphone, but the account is registered to the landline. To customers it looks like any other business number.
- Install WhatsApp Business from Google Play or the App Store and open it.
- Choose your country and enter the landline number – without an extension.
- Choose “Call me”. If it isn’t shown yet, it appears once the SMS timer has run out; WhatsApp says this can take up to ten minutes.
- Answer the landline. An automated voice reads out the 6-digit code.
- Enter the code in the app. Then set up the business profile, opening hours, greeting and away message (“Tools” tab).
Good to know: the app is then tied to the phone you set it up on. You can link up to four more devices, including a second phone, according to WhatsApp. If the main phone isn’t used for 14 days, WhatsApp logs out the linked devices.
Option B: on the WhatsApp Business Platform in a shared inbox
If the landline shouldn’t depend on an app on one phone, it runs on Meta’s Business Platform in a shared inbox. Meta requires a number that can receive voice calls or SMS; for landlines Meta recommends the call. This is how it works in The-Y CRM:
- First number: Settings → Channels → WhatsApp → “Connect WhatsApp” → “Connect new number”. In Meta’s window, choose your business, WhatsApp account and number.
- Another number: “Add number” in the Meta hub. The assistant takes you through six steps: preparation, number and display name, request code, enter code, two-step PIN, done.
- At “Request code”, choose “By call” and “Send code”. A computer voice reads out the 6-digit code.
- Enter the code without a hyphen and confirm. The-Y doesn’t store the code.
- Set a two-step PIN – it protects the number from being registered elsewhere.
Guide: Meta hub and adding a number →
Verification call not working? Troubleshooting
The classic case: you choose the call, the landline rings – and your own greeting answers (“Welcome to …, press 1 for sales”). The greeting talks over the code, WhatsApp’s call can’t navigate the menu, Meta hangs up. Meta itself says numbers behind a menu that can’t receive registration calls aren’t supported. The fix is always the same: for this one call, the number rings straight on a phone.
| Your situation | What to do |
|---|---|
| The number runs through the phone system in The-Y CRM | At “Request code”, click “Put the code call straight through to me (10 min)”. For 10 minutes the number rings straight on your extension, with no menu and no greeting. Then “By call”, “Send code”, pick up, note the code. Afterwards the normal routing applies again automatically. You need your own extension; if the line doesn’t pass on the dialled number, all incoming calls ring on your extension during those 10 minutes. |
| Another phone system (cloud or on-site) | Briefly forward the number to a desk phone or mobile at your provider or in your system, with menu and greeting off. Undo everything after you have the code. |
| The call never comes | Check: number entered without an extension, international calls allowed, call blocking off. In the app, the call option only appears after the SMS timer has run out. |
| Answering machine picks up | Switch it off and answer yourself. WhatsApp says that in most regions its system leaves a voice message with the code if you don’t answer – a fallback, not a plan. |
| You missed the code | Don’t guess – wrong codes lock you out for a while. Request a new code when allowed. WhatsApp says the waiting time can’t be shortened, and a new attempt can restart it. |
What a landline can and can’t do
| WhatsApp Business app | Business Platform (shared inbox) | |
|---|---|---|
| Landline possible? | yes, code by call | yes, code by call recommended |
| WhatsApp Messenger on a landline? | no – landlines only work in the Business app or on the Business Platform | |
| Where you reply | on the phone with the app, plus up to four linked devices | on a computer and in the app on your phone, any number of team members |
| Customers’ WhatsApp calls | ring in the app, not on the landline phone | in The-Y CRM, in the phone system (menu, group, voicemail) – only if the number doesn’t also run in the app and Meta’s conditions are met |
| Costs | app free | provider’s plan plus Meta’s per-message fees |
Regular landline calls stay as they are: number and minutes keep coming from your phone provider. The-Y doesn’t sell numbers or minutes.
What it costs
- Meta: since 1 Oct 2026, the first 1,000 free-form replies per number per month are free; after that each reply costs the service rate of the recipient’s country. Templates are charged from the first message. Meta bills you directly – no markup from us. Rates by country: cost calculator.
- The-Y CRM: Free €0 for up to 3 users. Cloud Pro €20 a month per company, all users and brands included (Alpha & Beta price; €40 from the Live release), hosted in Austria (Vienna data centre).
Which option fits?
Use the app if …
- one person answers WhatsApp,
- a phone can stay in the office for it,
- no phone system intercepts the code call – or you can switch it briefly.
Use a shared inbox if …
- several people reply or cover for each other,
- no phone should be tied to the business number,
- WhatsApp, email and calls should land in one place.
- To be fair: The-Y CRM is Alpha software. Other shared inboxes are in our comparisons.
Frequently asked questions
Can I use WhatsApp Business with a landline number?
Yes. According to WhatsApp’s help centre, landline numbers are supported in the WhatsApp Business app, not in WhatsApp Messenger. Landlines also work on the WhatsApp Business Platform, for example in a shared inbox. You receive the code by voice call.
Why isn’t the WhatsApp verification call coming through?
Check that you entered the number without an extension, that international calls are allowed and that call blocking is off. In the app, the call option only appears after the SMS timer has run out, which can take up to ten minutes. If the number runs through a phone system with a menu, route it straight to a phone for the call.
My phone system answers instead of the code. What now?
The greeting talks over the code, and WhatsApp’s call can’t navigate a menu. Route the number straight to a desk phone or mobile for that one call. The phone system in The-Y CRM has a button for this: “Put the code call straight through to me (10 min)”.
Will WhatsApp calls ring on the landline phone?
Not with the app: WhatsApp calls arrive in the app on the phone. With a shared inbox that has a built-in phone system, they can ring in the phone system – in The-Y CRM in the browser and on the desk phone. Meta does not allow forwarding them into the regular phone network.
Can I move the landline to a shared inbox later?
Yes. Either it stays in the Business app and also arrives in the inbox (in The-Y CRM with up to 180 days of history), or you delete the account in the app and connect the number again. Back up your chats before deleting.
Your landline on WhatsApp – no work phone needed.
Create a free account and connect your number – or click through the inbox and phone system in the demo with sample data first. The demo is deleted after 24 hours.
Prefer to do it together? We set it up with you by video call – in your browser, nothing to install. Mon–Fri 10–12 and 14–17 (Vienna time).
WhatsApp Business and personal on one phone · WhatsApp Business with multiple users · Virtual phone system for small business · Missed calls: press 1 for WhatsApp · All comparisons
Sources
- WhatsApp Help Center, accessed 7 Nov 2026: registering with a landline (call, waiting time, automated voice, no extension, don’t guess) · not receiving the code (voice message, waiting time) · landlines in the Business app only · linked devices
- Meta, Business Platform: phone numbers (call or SMS, call forwarding and IVR off, numbers behind an IVR not supported), accessed 7 Nov 2026
- The-Y CRM: Connect WhatsApp · Meta hub: add a number, verifying by call through a phone system · WhatsApp calls · Known issues · prices: costs page
WhatsApp is a trademark of WhatsApp LLC / Meta. Information to the best of our knowledge; please report errors to office@the-y.at and we’ll correct them right away.