Monaco (+377) verification codes for product and QA teams

Why do teams test with Monegasque numbers at all?

Monaco is tiny, but it punches above its size for businesses in private banking, hospitality, yachting services and international events. Customers there expect a product to accept a +377 number without complaint, and a surprising number of forms still assume anyone near the Riviera has a French +33 line.

That assumption causes real support tickets. Many people who work in Monaco live across the border in France and carry French numbers, while residents hold Monegasque ones, so a single customer base mixes both codes. A Monaco verification number, ordered as a +377 number for testing, lets QA engineers prove that the country picker, validation rules and SMS templates handle the principality as its own country rather than as a French suburb.

How should a form store and validate +377 numbers?

Monaco has its own country calling code, separate from France, and its national numbers are short compared with most of Europe. In international form there is no trunk prefix: the number is +377 followed directly by the subscriber digits.

A few practical rules for engineers:

• Persist numbers in E.164 (+377…) and render a friendly grouping only at display time.
• Users accustomed to French dialling sometimes type a leading 0 out of habit. Strip it during normalisation rather than failing validation.
• Don't infer the country from a +33 prefix and a Monaco postal address; keep the phone country and the billing country as independent fields.
• Use a maintained phone-number library instead of a hand-written length check, since hard-coded French lengths reject valid Monegasque numbers.

French is the official language, so verification texts typically arrive in French, though Italian and English are widely used locally and many apps send English when the account locale is set that way. Test both if your onboarding is localised.

Which services can a Monaco route verify?

More than 1,300 services are available on the Monaco route right now. Popular ones in today's snapshot include Instagram, Airbnb, Telegram, Claude, WhatsApp, Facebook, Google (Gmail & YouTube), Uber, Netflix, eBay, LinkedIn and X (Twitter).

Coverage is not fixed. Carrier partners rotate capacity during the day, so a service visible in the morning may be paused in the afternoon. Sound OTP routing reads availability at order time instead of relying on a cached list, and the SMS verification API exposes exactly that through the prices endpoint.

What does the Monaco OTP API sequence look like?

Requests go to https://otproute.com/api/v1 and authenticate with a Bearer key beginning or_live_, created in the Developer console. The country id for Monaco is mc.

1. Fetch GET /api/v1/services and GET /api/v1/countries occasionally to map names to ids.
2. Before each order, call GET /api/v1/prices?country=mc&service=<id>. It answers with the live price and whether the pairing can be served.
3. Create the order with POST /api/v1/activations, for example {"service": "airbnb", "country": "mc"}. Keep the returned activation id.
4. Type the +377 number into your app and wait for activation.sms_received on your webhook, or poll GET /api/v1/activations/{id}.
5. On teardown, call POST /api/v1/activations/{id}/cancel for anything still pending.

Verify each webhook's X-OTPRoute-Signature header by recomputing HMAC-SHA256 over <t>.<raw body> with the endpoint secret, and reject old timestamps. Each account may register 5 webhook endpoints and send up to 300 requests per minute, which leaves room for parallel Monaco runs. The integration guide walks through the same steps with error handling.

Is there a no-code way for operations staff?

The dashboard covers the same path for anyone who would rather not touch an API. Choose Monaco in the OTP Gateway, select the service, check the price that appears, and confirm. The +377 number shows on an activation card; paste it into the login or sign-up screen and the code appears on that card when the SMS lands.

The window lasts 20 minutes. If the code doesn't arrive in time, or you cancel the order, the full amount is refunded to the wallet without a support request.

What if a Monaco code fails to arrive?

Small markets have fewer routes, so patience and a fallback plan matter more here than in large countries.

• Give the order the full window before cancelling.
• Check whether the service accepts virtual numbers for that action; some refuse them outright.
• Retry after a pause rather than re-ordering in a loop, which can trigger rate limits on the service side.
• If the test only needs a Riviera-area number, the France route or Italy route may have deeper capacity at that moment.

Keep every test inside the service's terms. OTP Route is for verifying your own products and legitimate business accounts, and its Acceptable Use Policy applies.

Can you keep a Monaco number long term, and how is billing handled?

No self-serve long-term +377 line exists. Dedicated Virtual Numbers, which you keep while they renew and which support inbound SMS, outbound SMS and browser calling, are a United States and Canada product from $1.95/month. For a Monegasque line, email [email protected]; the team can say whether local rules allow anything, with no promise attached.

Monaco orders draw on the same prepaid USD wallet as everything else, with no monthly fee and no plan to choose. Top up by card or USDT/USDC, and expect a PDF invoice by email for each top-up. During integration work, a development account can be switched to sandbox on request, returning simulated numbers and codes so you can test end to end for nothing. Details sit on the pricing page.

Frequently asked questions

Is a Monaco phone number the same as a French one?

No. Monaco uses its own +377 code, so validation logic must treat it separately from France's +33.

What is the Monaco country id in the OTP Route API?

Use mc in the prices query and in the activation request body.

Can I get a +377 number for testing a European launch?

Yes, the OTP Gateway issues one-time +377 numbers for single verifications, ordered from the dashboard or the API.

How long do I have to receive the Monaco code?

Each activation stays open for 20 minutes; if nothing arrives, the charge is refunded automatically.

Do Monegasque numbers include a trunk prefix?

Not in international format. Strip any leading 0 a user types and store the number as +377 plus the subscriber digits.

Which language will a verification SMS from a Monaco service use?

Usually French, but it depends on the app and the account's language setting, so English or Italian texts are possible.

Can I run my Monaco tests without spending real funds?

Ask for sandbox mode on a development account. It returns simulated numbers and codes for integration testing.

Service names are trademarks of their respective owners. OTP Route is not affiliated with them. Use numbers lawfully, follow each service's terms and our Acceptable Use Policy.