How To Call Portugal From USA: The Ultimate Step-by-Step Dialing Guide

Dialing Portugal from the United States requires combining the U.S. exit code, Portugal's country code, the specific destination network or geographic prefix, and the subscriber number. Mastering this standard International Direct Distance Dialing (IDD) sequence ensures seamless connectivity across fixed lines and mobile networks while avoiding unexpected carrier surcharges.

Pre-Operation and Equipment Checklist

Placing an international phone call from the United States to Portugal involves navigating the North American Numbering Plan (NANP) and transitioning to the European telecommunications numbering space managed by ANACOM (Autoridade Nacional de Comunicações). Before dialing, verify your communication setup to minimize dropped connections and exorbitant international roaming fees.

• Essential Gear, Tools, and Materials:
  
  
  • A mobile smartphone, landline phone, or VoIP client (such as Skype, WhatsApp, or Google Voice) with an active network connection.
  • Sufficient account balance or an active international calling add-on if using traditional carrier services.
  • Your recipient's complete E.164 standard phone number, correctly formatted for international dialing.
• Mandatory Prerequisite Knowledge and Standards:
  
  
  • Familiarity with the specific time zone difference between your current U.S. location and mainland Portugal or the Azores (Western European Time / Western European Summer Time).
  • Awareness of the structural difference between Portuguese landline prefixes (geographic) and mobile prefixes (non-geographic).
• Budget and Duration Benchmarks:
  
  
  • Traditional carrier rates vary wildly from $0.01 to $3.00+ per minute depending on your provider, unless a specific international bundle is applied.
  • VoIP services typically range from free (app-to-app) to $0.01–$0.05 per minute for app-to-landline connections.

Step-by-Step International Dialing Procedure

Executing an international call from the United States to Portugal requires a precise sequence of digits. Follow this sequential workflow to ensure your call routes correctly through the international gateway switches.

Step 1: Dial the US Exit Code

Begin by dialing the United States international exit code, which tells the domestic telephone network that your call is leaving the country.

• On standard touch-tone keypads, enter 011.
• Alternatively, if you are using a mobile phone, you can press and hold the + key until the plus sign appears on your screen, which automatically substitutes the international exit code for your current network.

Pro-Tip: Using the plus sign (+) on a mobile phone dynamically adjusts the exit code depending on whether you are calling from the US or roaming internationally, preventing dialing errors if you travel.

Step 2: Enter Portugal's Country Code

Immediately following the exit code, enter the country code assigned to the Portuguese Republic by the International Telecommunication Union (ITU).

• Dial 351.
• There are no pauses or additional punctuation marks needed between the exit code and the country code.

Step 3: Dial the Area Code or Mobile Network Prefix

Portugal restructured its numbering plan to integrate area codes directly into subscriber dialing, but geographic and mobile identifiers remain essential for routing.

• For landlines, dial the specific two-digit regional prefix (such as 21 for Lisbon or 22 for Porto).
• For mobile phones, dial the carrier network prefix (such as 91 for Vodafone, 92 or 96 for MEO, and 93 for NOS).

Step 4: Enter the Local Subscriber Number

Complete the sequence by dialing the final seven-digit local subscriber number.

• Portuguese phone numbers (excluding country codes) consistently total nine digits in length (e.g., a 2-digit area/network code plus a 7-digit local number).
• Review your entire dialed string to ensure all digits are present before pressing the call button.

Warning: Never dial a leading zero (0) after the country code (351). While domestic callers within Portugal often dial a zero before regional prefixes, international dialing rules require dropping this trunk prefix, or the call will fail.

Technical Comparison of Calling Methods

Choosing the right platform to call Portugal depends on your budget, required audio quality, and whether your recipient uses a traditional landline or a smartphone application.

Common Connection Failures and Field Fixes

When calls to Portugal fail to connect, the issue usually stems from formatting errors, carrier blocks, or missing international dialing permissions. Review these troubleshooting protocols to resolve connection failures rapidly.

• Root Cause: A recorded error message states that the number is not in service or the call cannot be completed as dialed.
  
  
  • Actionable Fix: Verify that you omitted the leading zero (0) after the country code (351). Ensure you did not accidentally use a domestic toll-free prefix or an outdated regional code.
• Root Cause: The call immediately drops, or your mobile carrier blocks the outbound connection.
  
  
  • Actionable Fix: Contact your U.S. mobile carrier (Verizon, AT&T, T-Mobile, etc.) to confirm that international dialing is enabled on your line and that your account does not have a spending cap blocking international tolls.
• Root Cause: Persistent static, severe latency, or dropped packets during the conversation.
  
  
  • Actionable Fix: If using a VoIP or app-based service, switch from a weak cellular data connection to a stable high-speed Wi-Fi network, or transition to a traditional cellular voice network.

Frequently Asked Questions

What is the exact sequence to dial a landline in Lisbon from the US?

Dial 011 (the US exit code), then 351 (Portugal's country code), followed by 21 (Lisbon's area code), and finally the 7-digit local subscriber number. On a mobile phone, you can substitute 011 with the plus (+) sign.

Do I need to dial a zero before the Portuguese area code?

No. When calling internationally from the United States, you must omit the domestic trunk prefix (the leading zero) that callers inside Portugal use. Dialing 011-351-021-... will cause the call to fail.

How much does it cost to call Portugal from an American cell phone?

Standard carrier rates without an international plan can exceed $1.00 to $3.00 per minute. However, adding an international calling feature to your carrier plan or utilizing VoIP services like Google Voice or Skype typically reduces costs to between one and five cents per minute.

Can I call Portuguese mobile numbers using the same format?

Yes. The dialing sequence remains identical: exit code (011 or +), country code (351), followed by the 9-digit mobile number starting with network prefixes like 91, 92, 93, or 96, without any leading zero.

What is the time difference when calling Portugal from the US?

Portugal operates on Western European Time (WET), which is Greenwich Mean Time (GMT+0) and observes daylight saving time as Western European Summer Time (WEST, GMT+1). Depending on whether you are calling from Eastern, Central, Mountain, or Pacific time in the US, Portugal is generally 5 to 8 hours ahead.

Optimize Your Global Communications Today

Streamline your international connectivity by pairing these precise dialing protocols with the most cost-effective carrier or VoIP solution for your specific communication needs. Bookmark this guide to ensure flawless international dialing whenever you need to connect with friends, family, or business partners across the Atlantic.