00351 Country Code: Location, Format, and How to Dial It

The 00351 country code is the international dialing prefix used to reach telephone numbers in Portugal. When you see this code at the beginning of a phone number, it means the call, text message, or verification prompt originates from or is directed to the Portuguese telecommunications network.

Introduction

Seeing an unfamiliar international dialing code on your phone can raise questions. If you received a missed call, an unexpected text message, or an account verification prompt containing the numbers 00351, you are dealing with a communication linked to Portugal.

Understanding international country codes helps you identify where communications originate, format numbers correctly when making international calls, and protect your personal information when dealing with unexpected messages. This guide explains everything you need to know about the 00351 country code, how Portuguese phone numbers are structured, and what to keep in mind when communicating internationally.

What it means / how it works

International dialing codes are standardized by the International Telecommunication Union (ITU). Every country or autonomous region is assigned a specific numeric code. Portugal is assigned the code 351.

The leading "00" in 00351 is not part of the country code itself. It is the international direct dialing (IDD) prefix used to exit your local telephone network when calling abroad from many countries, such as those in Europe and parts of South America and Asia. If you are using a mobile phone, you can usually replace the "00" prefix with a plus sign (+). Therefore, 00351 and +351 function identically.

Portuguese telephone numbers use a closed numbering plan, meaning that area codes are integrated directly into the subscriber number. Whether you are calling a landline in Lisbon or a mobile phone anywhere in the country, the local number always maintains a fixed length of nine digits following the country code.

Practical scenarios

• Receiving international business calls: You may see 00351 when a client, customer support team, or corporate partner based in Portugal calls your phone.
• Booking travel arrangements: If you are planning a trip to Lisbon, Porto, or the Algarve, you might need to dial 00351 to contact hotels, rental car agencies, or tour operators directly.
• Online account verification: Digital platforms, banking apps, and social networks sometimes send one-time passwords via SMS using Portuguese mobile gateways routed through international numbers.
• Reaching family and friends: Expatriates and travelers use the +351 prefix to stay in touch with relatives living in Portugal.
• Verifying missed calls: If your phone displays a missed call starting with 00351, it indicates someone attempted to reach you from a Portuguese line.
• E-commerce and shipping inquiries: Tracking online orders shipped from Portuguese retailers often involves communicating with local logistics providers using this country code.

Step-by-step

Dialing a phone number in Portugal from another country requires the correct sequence of digits to ensure your call connects successfully.

1. Find your country's exit code: If you are calling from a landline, identify the international prefix required to dial out of your current country. In most European countries, this is 00. If you are calling from North America, it is 011.
2. Dial the exit code or plus sign: Enter the international prefix (00) or press and hold the zero key on your mobile phone to input the plus sign (+).
3. Enter the country code: Type 351 immediately after the exit code or plus sign.
4. Dial the subscriber number: Enter the nine-digit Portuguese local number. Do not add a trunk prefix like zero (0) before the local number, as international dialing requires dropping the domestic trunk prefix.
5. Review the complete sequence: Your final dialed string should resemble +351 XX XXX XXXX or 00351 XX XXX XXXX. Press call and wait for the connection.

Safety/privacy/legal

Receiving calls or text messages from an international number like 00351 requires a balanced approach to personal security. While the vast majority of communications originating from Portugal are legitimate, international prefixes can occasionally be used for unsolicited communications or automated calls.

If you receive a missed call from 00351 and do not know anyone in Portugal, returning the call blindly can result in unexpected international toll charges or connect you to premium-rate services. It is generally safest to ignore missed calls from unknown international numbers unless you are expecting a specific communication.

When dealing with online account verification codes sent via SMS, ensure that you only enter your phone number on trusted, official platforms. Publicly shared phone numbers and unverified online inboxes should be avoided for sensitive financial or personal accounts because shared messaging environments allow anyone viewing the public inbox to see incoming verification texts.

Best alternatives

Managing international communications, testing global SMS delivery systems, or protecting your primary phone number during online registrations often requires flexible telephone solutions.

Depending on your specific use case, you might choose between public messaging boards, temporary mobile numbers, or dedicated rental lines. Free public inboxes are suitable for quick, low-stakes tests where privacy is not a priority. However, for recurring logins, account recovery, or business communication, temporary numbers often fail because platforms reject recycled or VoIP endpoints.

For users who need a reliable, private option instead of a public inbox, PVACodes can be considered as an SMS verification solution, offering virtual numbers across various countries depending on current availability and platform requirements.

Frequently Asked Questions

What country does 00351 belong to?

The 00351 country code belongs to Portugal, located in southwestern Europe on the Iberian Peninsula.

Is 00351 the same as +351?

Yes. The "00" prefix is the international exit code used in many countries to dial abroad, which performs the exact same function as the plus sign (+) on mobile devices.

How many digits are in a Portuguese phone number?

After the 351 country code, Portuguese subscriber numbers always consist of exactly nine digits for both landlines and mobile phones.

Why am I receiving calls from 00351?

You may receive calls from this code if you have business connections, travel bookings, family members, or customer service interactions involving entities based in Portugal.

Are calls to 00351 expensive?

Call rates depend entirely on your current mobile or landline carrier and your specific calling plan. International rates apply when dialing Portuguese numbers from abroad.

Can I send an SMS to a 00351 number?

Yes, you can send text messages to Portuguese mobile numbers by formatting your recipient's number with the +351 prefix followed by their nine-digit mobile number.

What should I do if I get a missed call from 00351?

If you do not recognize the number and are not expecting any communication from Portugal, it is generally best not to call back to avoid international connection fees.

Do Portuguese mobile numbers use area codes?

Portugal uses a closed numbering plan where local area codes are integrated directly into the nine-digit subscriber number.

Why did my verification code from a 00351 number fail to arrive?

SMS delivery delays can occur due to carrier filtering, weak signal strength, temporary gateway congestion, or platform-side restrictions against certain number types.

Is it safe to use a virtual number for Portuguese services?

Using a virtual number depends on the specific platform's terms of service and whether the number type (mobile versus VoIP) is accepted for account registration.

Conclusion

The 00351 country code is your direct line to identifying and communicating with individuals, businesses, and digital services in Portugal. Whether you are dialing a Portuguese contact manually, sorting out an international verification code, or managing global communication channels, understanding how international prefixes work ensures smooth connectivity. Always verify the source of unexpected international calls, use secure channels for account verifications, and select the appropriate number type for your specific communication needs.