Guam · +1-671 · Oceania

How to Call Guam (+1-671) from Abroad

Your complete guide to dialling Guam from Hagåtña to anywhere in the world — verified +1-671 country code, Pacific/Guam time zone, Oceania region, ISO references, live local time and weather, plus a step-by-step walkthrough.

Get a Demo See Pricing

Live carrier coverage

100+ countries

500+ direct interconnects

Calling

Guam

+1-671

Live route

Hagåtña

Weather

HD voice signal

98%

Alpha-2

Alpha-3

GUM

TKOS direct route

🇬🇺

Guam

2 Digit ISO

+1-671

Country Calling Code

GUM

3 Digit ISO

Capital

Hagåtña

Time zone

Pacific/Guam

Weather · Hagåtña

Humidity

Wind

Loading map

🇬🇺

Guam

+1-671

Capital

Hagåtña

Region

Oceania

Time zone

Pacific/Guam

Coordinates

13.4° N, 144.8° E

ISO 3166-1

GU / GUM

Dial format

+1-671 [area] [number]

Current time in Hagåtña

—:—

Best time to call: 09:00 – 17:00 Guam

Dialing guide

How to call Guam

A complete international number is built from four parts. Here's the anatomy and the dialling order.

Number anatomy

Exit prefix+

Country code1

Area / mobileXX

Subscriber numberXXX XXX

Final dialled number+1-671 XX XXX XXX

Valid E.164

Format follows ITU-T Recommendation E.164 the international public telecommunication numbering plan.

01Step 1 of 4

Start with the exit prefix

Press + on a mobile (hold the 0 key), or dial 00 from most countries / 011 from North America.

02Step 2 of 4

Add the Guam code

Dial +1-671. This identifies Guam on the global telephone network.

03Step 3 of 4

Enter the area or mobile prefix

Type the first part of the local number. Drop the leading 0 if there is one.

04Step 4 of 4

Finish with the subscriber number

The remaining digits route the call to the specific line in Hagåtña or elsewhere.

Guam country code +1-671 for WhatsApp

To call Guam on WhatsApp, save the number with +1-671 and no exit prefix — WhatsApp dials from your contacts, not a dial pad. Voice and video calls are free over data.

Save as +1 XX XXX XXX — use + not 001Drop any leading 0 from the local numberOpen WhatsApp > New Chat > find contact > tap callFree over Wi-Fi or mobile data

Need an inbound Guam number?

TKOS provisions +1-671 DIDs and termination through direct carrier interconnects.

Talk to wholesale See Pricing

Call quality

Tips for clear & uninterrupted calls

Whether you're reaching Guam for business or family, three habits keep every conversation crystal clear and a clean route from TKOS handles the rest.

HD audio for Guam calls
Hagåtña routes support G.722 wideband on North American carriers — an HD-compatible headset makes the gap between good and great audio obvious on these Zone 1 links.
Connection quality to Guam
Hagåtña is ~11,936 km away — latency runs 280–310ms. Use wired ethernet to eliminate Wi-Fi jitter on this long-haul path.
Best time to call Hagåtña
Schedule Guam calls during Hagåtña business hours — 09:00–17:00 Pacific/Guam — your contact will be at their desk in a quiet space rather than taking the call on the move.

Country profile

Connecting you to Guam, one journey at a time.

Capital

Hagåtña

Population

168.8K

Area

549 km²

GDP (USD)

$6.10B

Currency

US Dollar (USD $)

Languages

English, Chamorro

Emergency number

911

Internet TLD

.gu

Drive side

Right-hand traffic

Latitude / Longitude

13.44°N / 144.79°E

Time zone

Pacific/Guam

ISO 3166 codes

GU · GUM

From South Africa

Calling Guam from South Africa

Hagåtña is a Zone 1 destination — among the lowest VoIP rates globally, ~11,936 km from South Africa.

MethodRateQualityContract

TKOS VoIPLowestHD audioNone

SA mobile carrier3–8× higherStandardBundle required

Calling cardVariableCompressedActivation fee

See TKOS international rates

Why TKOS

Why call Guam with TKOS?

Built on top of every Guam (+1-671) route quality, price, and people you can reach.

Crystal-clear calls to Guam

TKOS terminates Guam traffic on Zone 1 carrier interconnects reaching Hagåtña. Some of the lowest round-trip latency globally, with HD voice on every call.

Feature 01 / 03

Zone 1 pricing for Guam

Guam (Hagåtña) is a Zone 1 destination — routes to Hagåtña are among the lowest per-minute tiers globally. Transparent per-minute rates for Guam (+1-671), no hidden fees.

Feature 02 / 03

Support aligned to Hagåtña hours

Your account manager covers Pacific/Guam hours for Guam. Phone, email, and live chat — always online for Hagåtña routes, day or night.

Feature 03 / 03

FAQ

Questions about calling Guam, answered.

Everything a business or traveller needs to know before dialling Guam (+1-671). Can't find an answer? Our team is one click away.

Q1.What is the country code for Guam?

Guam's international calling code is +1-671. Dial it immediately after your exit prefix and before the local subscriber number whenever calling from outside Guam.

Q2.What is the best time to call Guam?

Monday–Friday, 9:00–11:00 AM ChST (UTC+10) is the window. Guam runs on Chamorro Standard Time year-round — fixed at UTC+10 with no daylight saving. As a US territory, it observes US federal holidays. Business hours are 8 AM–5 PM.

Q3.How do I call a mobile number in Guam?

Guam uses the North American Numbering Plan (NANP) with area code 671. Dial +1 671 then the 7-digit number. A typical Guam number: +1 671 647 1234.

Q4.What time zone does Guam use?

Guam uses the Pacific/Guam time zone. Factor in the Hagåtña local time before placing calls — the best window for business calls is typically 09:00–17:00 Pacific/Guam.

Q5.Can I use WhatsApp or Viber to call Guam?

Yes — WhatsApp and Viber both support free app-to-app voice calls to Guam over Wi-Fi or mobile data. To call a regular +1-671 landline or mobile, you will need a paid credit balance or subscription plan.

Global directory

List of Country Codes

Find international dialing codes for every country. Click any country to get the full calling guide & tips.

All countries AZ

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Get a Demo

Start calling Guam on the same carrier-grade network.

The route you pilot today is the route that carries your millionth minute to Guam (+1-671). No migration. No replatforming. No renegotiation.

Get a Demo See Pricing

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← All country codes

Guam · +1-671 · Oceania

How to Call Guam (+1-671) from Abroad

Get a Demo See Pricing

Live carrier coverage

100+ countries

500+ direct interconnects

Calling

Guam

+1-671

Live route

Hagåtña

Weather

HD voice signal

98%

Alpha-2

Alpha-3

GUM

TKOS direct route

🇬🇺

Guam

2 Digit ISO

+1-671

Country Calling Code

GUM

3 Digit ISO

Capital

Hagåtña

Time zone

Pacific/Guam

Weather · Hagåtña

Humidity

Wind

Loading map

🇬🇺

Guam

+1-671

Capital

Hagåtña

Region

Oceania

Time zone

Pacific/Guam

Coordinates

13.4° N, 144.8° E

ISO 3166-1

GU / GUM

Dial format

+1-671 [area] [number]

Current time in Hagåtña

—:—

Best time to call: 09:00 – 17:00 Guam

Dialing guide

How to call Guam

A complete international number is built from four parts. Here's the anatomy and the dialling order.

Number anatomy

Exit prefix+

Country code1

Area / mobileXX

Subscriber numberXXX XXX

Final dialled number+1-671 XX XXX XXX

Valid E.164

Format follows ITU-T Recommendation E.164 the international public telecommunication numbering plan.

01Step 1 of 4

Start with the exit prefix

Press + on a mobile (hold the 0 key), or dial 00 from most countries / 011 from North America.

02Step 2 of 4

Add the Guam code

Dial +1-671. This identifies Guam on the global telephone network.

03Step 3 of 4

Enter the area or mobile prefix

Type the first part of the local number. Drop the leading 0 if there is one.

04Step 4 of 4

Finish with the subscriber number

The remaining digits route the call to the specific line in Hagåtña or elsewhere.

Guam country code +1-671 for WhatsApp

To call Guam on WhatsApp, save the number with +1-671 and no exit prefix — WhatsApp dials from your contacts, not a dial pad. Voice and video calls are free over data.

Save as +1 XX XXX XXX — use + not 001Drop any leading 0 from the local numberOpen WhatsApp > New Chat > find contact > tap callFree over Wi-Fi or mobile data

Need an inbound Guam number?

TKOS provisions +1-671 DIDs and termination through direct carrier interconnects.

Talk to wholesale See Pricing

Call quality

Tips for clear & uninterrupted calls

Whether you're reaching Guam for business or family, three habits keep every conversation crystal clear and a clean route from TKOS handles the rest.

HD audio for Guam calls
Hagåtña routes support G.722 wideband on North American carriers — an HD-compatible headset makes the gap between good and great audio obvious on these Zone 1 links.
Connection quality to Guam
Hagåtña is ~11,936 km away — latency runs 280–310ms. Use wired ethernet to eliminate Wi-Fi jitter on this long-haul path.
Best time to call Hagåtña
Schedule Guam calls during Hagåtña business hours — 09:00–17:00 Pacific/Guam — your contact will be at their desk in a quiet space rather than taking the call on the move.

Country profile

Connecting you to Guam, one journey at a time.

Capital

Hagåtña

Population

168.8K

Area

549 km²

GDP (USD)

$6.10B

Currency

US Dollar (USD $)

Languages

English, Chamorro

Emergency number

911

Internet TLD

.gu

Drive side

Right-hand traffic

Latitude / Longitude

13.44°N / 144.79°E

Time zone

Pacific/Guam

ISO 3166 codes

GU · GUM

From South Africa

Calling Guam from South Africa

Hagåtña is a Zone 1 destination — among the lowest VoIP rates globally, ~11,936 km from South Africa.

MethodRateQualityContract

TKOS VoIPLowestHD audioNone

SA mobile carrier3–8× higherStandardBundle required

Calling cardVariableCompressedActivation fee

See TKOS international rates

Why TKOS

Why call Guam with TKOS?

Built on top of every Guam (+1-671) route quality, price, and people you can reach.

Crystal-clear calls to Guam

TKOS terminates Guam traffic on Zone 1 carrier interconnects reaching Hagåtña. Some of the lowest round-trip latency globally, with HD voice on every call.

Feature 01 / 03

Zone 1 pricing for Guam

Guam (Hagåtña) is a Zone 1 destination — routes to Hagåtña are among the lowest per-minute tiers globally. Transparent per-minute rates for Guam (+1-671), no hidden fees.

Feature 02 / 03

Support aligned to Hagåtña hours

Your account manager covers Pacific/Guam hours for Guam. Phone, email, and live chat — always online for Hagåtña routes, day or night.

Feature 03 / 03

FAQ

Questions about calling Guam, answered.

Everything a business or traveller needs to know before dialling Guam (+1-671). Can't find an answer? Our team is one click away.

Q1.What is the country code for Guam?

Guam's international calling code is +1-671. Dial it immediately after your exit prefix and before the local subscriber number whenever calling from outside Guam.

Q2.What is the best time to call Guam?

Q3.How do I call a mobile number in Guam?

Guam uses the North American Numbering Plan (NANP) with area code 671. Dial +1 671 then the 7-digit number. A typical Guam number: +1 671 647 1234.

Q4.What time zone does Guam use?

Guam uses the Pacific/Guam time zone. Factor in the Hagåtña local time before placing calls — the best window for business calls is typically 09:00–17:00 Pacific/Guam.

Q5.Can I use WhatsApp or Viber to call Guam?

Global directory

List of Country Codes

Find international dialing codes for every country. Click any country to get the full calling guide & tips.

All countries AZ

Get a Demo

Start calling Guam on the same carrier-grade network.

The route you pilot today is the route that carries your millionth minute to Guam (+1-671). No migration. No replatforming. No renegotiation.

Get a Demo See Pricing

Free trialNo card requiredPort numbers freeMonth-to-month billing

How to Call Guam (+1-671) from Abroad

How to call Guam

Start with the exit prefix

Add the Guam code

Enter the area or mobile prefix

Finish with the subscriber number

Guam country code +1-671 for WhatsApp

Tips for clear & uninterrupted calls

HD audio for Guam calls

Connection quality to Guam

Best time to call Hagåtña

Connecting you to Guam, one journey at a time.

Calling Guam from South Africa

Why call Guam with TKOS?

Crystal-clear calls to Guam

Zone 1 pricing for Guam

Support aligned to Hagåtña hours

Questions about calling Guam, answered.

List of Country Codes

Start calling Guam on the same carrier-grade network.

How to Call Guam (+1-671) from Abroad

How to call Guam

Start with the exit prefix

Add the Guam code

Enter the area or mobile prefix

Finish with the subscriber number

Guam country code +1-671 for WhatsApp

Tips for clear & uninterrupted calls

HD audio for Guam calls

Connection quality to Guam

Best time to call Hagåtña

Connecting you to Guam, one journey at a time.

Calling Guam from South Africa

Why call Guam with TKOS?

Crystal-clear calls to Guam

Zone 1 pricing for Guam

Support aligned to Hagåtña hours

Questions about calling Guam, answered.

List of Country Codes

Start calling Guam on the same carrier-grade network.