How to Call Guam
Complete guide to dialing Guam (country code +1-671)
Wondering how to call Guam from your home country? You've come to the right place. Whether you're connecting with family, friends, or business contacts on this beautiful Pacific island, calling Guam doesn't have to be complicated. This comprehensive guide walks you through everything you need to know about dialing Guam correctly, from understanding country codes to entering local numbers. We'll cover step-by-step dialing instructions for landlines and mobile phones, highlight common mistakes people make when placing international calls, share essential phone etiquette tips for communicating with residents, and provide useful emergency and service numbers you might need. By the end of this guide, you'll feel confident making crystal-clear calls to Guam every single time.
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Quick Reference
Dialing Instructions
International Dialing Format Structure
To call Guam, you need to understand the basic dialing format: Exit Code + 1 + 671 + Local Number. Guam uses country code +1 (shared with the USA) and area code 671. Local numbers in Guam are 7 digits long.
Dialing from Different Countries
From the USA:
Since Guam shares country code +1 with the United States, simply dial: 1-671-XXX-XXXX
Example: To call 1-671-472-5678, dial exactly as shown.
From the UK:
Use exit code 00, then: 00-1-671-XXX-XXXX
Example: To call 1-671-635-2345 from the UK, dial: 00-1-671-635-2345
From other countries:
Replace your country's exit code (typically 00 or 011), then: [Exit Code]-1-671-XXX-XXXX
Example from Australia: 0011-1-671-789-4567
Specific Dialing Examples
Example 1 - Landline:
To call Guam landline 1-671-477-9988 from the USA: 1-671-477-9988
From the UK: 00-1-671-477-9988
Example 2 - Mobile:
To call Guam mobile 1-671-688-1234 from the USA: 1-671-688-1234
From Germany: 00-1-671-688-1234
Example 3 - Business line:
To call 1-671-475-0123 from Canada: 1-671-475-0123
From Japan: 010-1-671-475-0123
Important Notes About Leading Zeros
Guam numbers do not use leading zeros, so this rule doesn't apply. Always dial the full 7-digit local number after 671.
Quick Tips
- Save international numbers in your phone with the + symbol: +1-671-XXX-XXXX
- Check your mobile plan for international calling rates
- Consider using VoIP services or apps for cheaper rates
- Verify the specific number format before dialing
Following these steps ensures successful connection to any Guam telephone number from anywhere worldwide.
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Common Mistakes
When calling Guam, people frequently make these dialing errors:
1. Confusing Guam's code with an international country code
Since Guam uses +1-671, many assume it requires international dialing. However, if calling from the U.S., Canada, or other North American Numbering Plan countries, simply dial 1-671 plus the seven-digit number—no international exit code needed.
2. Adding unnecessary exit codes from the U.S.
Americans often dial 011 (U.S. exit code) before calling Guam. This is incorrect. Treat Guam like a U.S. area code: dial 1-671-XXX-XXXX directly.
3. Forgetting the "1" prefix
Some callers dial only 671 plus the local number. Always include the "1" before 671, just as you would when calling between U.S. states.
4. Using international rates assumptions
People expect expensive international charges, but calls from the U.S. to Guam typically cost the same as domestic long-distance calls. Check your phone plan—many include Guam in unlimited calling.
5. Dropping digits from the local number
Guam numbers are seven digits after 671. Ensure you have the complete number before dialing.
Cultural Etiquette
When making phone calls in Guam, understanding local customs helps create positive connections. The island's warm, friendly culture is reflected in phone conversations, though context matters significantly.
Greetings and Tone
Start calls with a friendly "Hafa Adai" (hello in Chamorro) or a simple "Hello, how are you?" Guamanians appreciate warm, personable greetings even in business contexts. While professional calls maintain respectful boundaries, they're generally less formal than mainland U.S. standards.
Business vs. Personal Calls
Business calls should occur during standard working hours (8 AM to 5 PM). Personal calls allow more flexibility, though avoid calling before 8 AM or after 9 PM unless it's urgent or you have a close relationship.
Formality Level
Guam's culture blends American and Chamorro traditions. Address elders and new business contacts formally using titles and last names. Once invited, switching to first names is acceptable. Casual friendliness is valued, but always show respect to older generations.
Voice Messages
Leave clear, concise messages including your name, reason for calling, and callback number. Speaking slowly helps, as many Guamanians speak English as a second language alongside Chamorro.
Cultural Considerations
Respect family time—Sundays are particularly important for church and family gatherings. Be patient during conversations; Guamanians value relationship-building over rushing through calls. Understanding the island's multicultural community (Chamorro, Filipino, Micronesian, and others) means appreciating diverse communication styles while maintaining courtesy and warmth.
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Emergency Numbers
Essential Emergency Numbers:
- 911 - Universal Emergency Number (Police, Fire, Ambulance)
- 411 - Directory Assistance
- 671-475-8615 - Guam Police Department (non-emergency)
- 671-646-9462 - Guam Fire Department (non-emergency)
- 671-635-4050 - Guam Memorial Hospital
Important Information:
All emergency calls to 911 are free from any phone, including mobile phones, payphones, and landlines. No coins or calling cards are required. The service operates 24/7 with English-speaking operators available. Chamorro and other language assistance can be arranged when needed.
Mobile phones will connect to 911 even without an active service plan. When calling from a mobile device, clearly state your location as GPS tracking may be limited in some areas. For non-urgent matters, use the non-emergency numbers listed above to keep 911 lines available for critical situations.
Useful Numbers
Directory Assistance & Information Services
- 411: Local directory assistance for phone numbers and addresses
- 1-800-225-5322: AT&T international operator for overseas calls
Tourist Services
- (671) 646-5278: Guam Visitors Bureau for tourism information and assistance
- (671) 475-0200: Tumon Tourist Police for visitor-related concerns
Consular Services
- (671) 333-4955: U.S. Consular Agency in Hagåtña for citizen services
- (671) 646-1290: Japanese Consulate General
- (671) 969-2303: Philippine Consulate General
Other Useful Numbers
- (671) 635-1414: Guam Memorial Hospital main line
- (671) 475-8255: Lost and Found at A.B. Won Pat International Airport
- 511: Road conditions and traffic information
- (671) 475-FIRE (3473): Non-emergency Guam Fire Department inquiries
Keep these numbers handy for convenient access to essential services during your stay.
Tips for Calling Guam
When calling Guam, timing is crucial for successful communication. Guam operates on Chamorro Standard Time (UTC+10) and doesn't observe daylight saving time, making it consistently ahead of most regions.
Best Times to Call
For personal calls from the U.S. mainland, evening hours work best—calling between 6-10 PM PST reaches Guam during their morning (12-4 PM next day). East Coast callers should aim for 9 PM-1 AM EST.
Business Considerations
Standard business hours run Monday-Friday, 8 AM-5 PM. Always schedule business calls in advance to demonstrate professionalism and accommodate the significant time difference. Avoid calling during lunch hours (12-1 PM local time).
Peak calling times (mornings) may experience higher rates and network congestion. Off-peak evening and weekend calls often cost less.
Days to Avoid
Respect major U.S. federal holidays plus local observances like Liberation Day (July 21) and Guam History and Chamorro Heritage Day (first Monday in March).
Communication Tips
Speak clearly, as international connections may have slight delays. Confirm the time zone when scheduling, and send calendar invites with both local times to prevent confusion.
Frequently Asked Questions
The country code for Guam is +1-671. Guam uses the North American Numbering Plan, so it shares the +1 country code with the United States and Canada, but has its own area code 671 which distinguishes it from other regions.
To dial Guam from your cell phone, dial +1-671 followed by the 7-digit local phone number. Most smartphones allow you to enter the + symbol by pressing and holding the 0 key. The complete number format is: +1-671-XXX-XXXX.
No, there is no leading zero to drop when calling Guam. Guam phone numbers are 7 digits and don't start with a zero. Simply dial +1-671 followed by the complete 7-digit local number without any modifications.
The cheapest way to call Guam is using ZippCall, which offers affordable pay-as-you-go international calling rates. With ZippCall, you can call from your web browser, iPhone, or Android device with no contracts, no subscriptions, and no hidden fees—just transparent, low-cost rates for calling Guam.
In Guam, dial 911 for all emergencies including police, fire, and medical services. This is the same emergency number used throughout the United States. For non-emergency police assistance, you can contact the Guam Police Department at (671) 472-8911.
Yes, you can call Guam directly from your web browser using ZippCall. Simply visit the ZippCall website, enter the Guam phone number you wish to call, and connect instantly without needing to download any software or apps.
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