The Guam country code is +1 — Guam is a US territory inside the North American Numbering Plan, reached through the single area code 671. The largest of the Mariana Islands, a strategically vital US military hub + "Where America's Day Begins". Guam bank verifications + business OTPs all expect +1 671.
Guam shares the +1 country code of the North American Numbering Plan with the US, Canada + other US territories. It is reached with +1 followed by its single area code — 671 — then a 7-digit local number, just like a stateside US number.
Guam does NOT have a unique country code — it is a US territory inside the North American Numbering Plan (NANP) and uses <b>+1</b>, the same code as the US mainland + Canada. A Guam number is <b>+1</b> followed by its single area code <b>671</b>, then a 7-digit local number: <code>+1 671 123 4567</code> = 10 digits after +1. From the US mainland you reach Guam as a <b>domestic call</b> (dial 1 + 671 + number, no 011), though distance + carrier rates may apply.
Guam is an unincorporated territory of the United States; its residents are US citizens. Three carriers serve the island: <b>GTA</b> (GTA TeleGuam, the former local exchange), <b>Docomo Pacific</b> (NTT Docomo's Pacific arm) + <b>IT&E</b>. All three issue mobile + landline numbers across the single <b>671</b> area code. ITU zone 7.
Guam uses a single area code — <b>671</b> — covering the entire island, from Hagåtña the capital to Dededo, Tamuning + Yigo in the north to Agat + Santa Rita in the south. There is no leading 0 + no per-village code. Ten-digit dialing (671 + 7-digit number) is standard, exactly like a stateside US area code.
Guam markets itself as "Where America's Day Begins". Sitting just west of the International Date Line on Chamorro Standard Time (UTC+10), Guam is the first US soil to greet each new day. The largest + southernmost of the Mariana Islands, it is a strategically vital US military hub — Andersen Air Force Base + Naval Base Guam. The indigenous Chamorro culture, ancient latte stones, the resort beaches of Tumon Bay + intense World War II history (the US recaptured Guam in 1944) define the island. Tourism — heavily from Japan + Korea — plus the military anchor the economy.
A Guam phone number in international format is written as +1 671 [7-digit local]. Example: +1 671 123 4567. The single area code 671 covers the whole island — there is no leading 0 to drop + no per-village code.
Because Guam is a US territory in the NANP, from the US mainland you simply dial 1 + 671 + 7 digits (no 011 prefix needed — it is a domestic call). From everywhere else you dial your exit code, then 1, then 671 + number. On any mobile, + replaces the exit code: +1 671 123 4567 works worldwide.
From Hagåtña the capital to the resort strip of Tumon Bay, every Guam number lives behind +1 with the single area code 671. One area code covers the whole island — pick a 671 number to sound local anywhere on Guam.
Because Guam is a US territory in the NANP, callers on the US mainland dial it as a domestic call: 1 + 671 + number, no 011. From everywhere else, use your exit code then 1. From any mobile, + replaces the exit code — so +1 671 123 4567 works worldwide. There is no leading 0 to drop.
11 671 XXX XXXX+1 671 XXX XXXX11 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX00110011 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX010010 1 671 XXX XXXX+1 671 XXX XXXX001001 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX001001 1 671 XXX XXXX+1 671 XXX XXXX002002 1 671 XXX XXXX+1 671 XXX XXXX001001 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX0000 1 671 XXX XXXX+1 671 XXX XXXX00 2100 21 1 671 XXX XXXX+1 671 XXX XXXXTip: Guam uses the single area code 671 across the whole island, so any 671 number reaches any Guam phone. From the US mainland you do NOT dial 011 — Guam is within the +1 NANP as a US territory + the call is domestic (carrier distance rates may still apply).
+1 671 reaches a US territory in the western Pacific — a strategic military hub + a Japan/Korea-driven tourism economy. Guam banks, government services + hospitality businesses verify + connect with +1 671.
Guam banks (Bank of Guam, BankPacific, ANZ Guam), credit unions + government services verify with +1 671 mobile OTPs. A local Guam number lets you receive those codes + sign up for island services from anywhere.
Because Guam is a US territory in the +1 NANP, callers on the US mainland reach it as a domestic call — just 1 + 671 + number, no 011 + no international-call fuss. A +1 671 line feels effortless to reach from the United States.
Guam uses the US DOLLAR (USD) + its residents are US citizens. A +1 671 number plugs you straight into a dollar-denominated US-territory market with US business, banking + e-commerce conventions in the Pacific.
Guam is a strategically vital US military hub — Andersen Air Force Base + Naval Base Guam — alongside GovGuam services. A +1 671 number keeps you reachable to base contractors, government offices + the large military-connected community on the island.
Guam's economy leans heavily on tourism — overwhelmingly from Japan + Korea — centered on Tumon Bay's resort strip. Hotels, tour operators, dive shops + retail all run on +1 671 lines, essential for any hospitality or travel business serving Guam visitors.
Guam runs on Chamorro Standard Time (ChST, UTC+10) year-round with no DST — aligned with Sydney/Brisbane + close to Tokyo, Seoul + Manila business hours. A +1 671 line lands calls in convenient Asia-Pacific windows.
Pick a +1 671 number — the single area code covering the whole island — and start calling, texting + receiving Bank of Guam + business OTPs from real Guam customers.
Same six features come standard on every CallMama Guam number — no upsell tiers, no per-feature charges.
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Name, country code, ISO 3166 alpha-2 & alpha-3, exit code, and ITU zone. Filter by continent or search by name or code.
| Country | Code | ISO-2 | ISO-3 | Exit | Zone |
|---|---|---|---|---|---|
| Afghanistan | +93 | AF | AFG | 00 | 9 |
| Albania | +355 | AL | ALB | 00 | 3 |
| Algeria | +213 | DZ | DZA | 00 | 2 |
| American Samoa | +1 | AS | ASM | 011 | 1 |
| Andorra | +376 | AD | AND | 00 | 3 |
| Angola | +244 | AO | AGO | 00 | 2 |
| Anguilla | +1 | AI | AIA | 011 | 1 |
| Antarctica | +672 | AQ | ATA | 00 | 6 |
| Antigua and Barbuda | +1 | AG | ATG | 011 | 1 |
| Argentina | +54 | AR | ARG | 00 | 5 |
| Armenia | +374 | AM | ARM | 00 | 3 |
| Aruba | +297 | AW | ABW | 00 | 2 |
| Australia | +61 | AU | AUS | 0011 | 6 |
| Austria | +43 | AT | AUT | 00 | 4 |
| Azerbaijan | +994 | AZ | AZE | 00 | 9 |
| Bahamas | +1 | BS | BHS | 011 | 1 |
| Bahrain | +973 | BH | BHR | 00 | 9 |
| Bangladesh | +880 | BD | BGD | 00 | 8 |
| Barbados | +1 | BB | BRB | 011 | 1 |
| Belarus | +375 | BY | BLR | 810 | 3 |
+1 671 123 4567.1 671 123 4567. On any mobile you can also dial +1 671 123 4567.010 1 671 123 4567. Japan is one of Guam's largest tourism sources, making this a busy route. From any mobile, use +1 671 123 4567.0011 1 671 123 4567. Guam shares the UTC+10 clock with eastern Australia. From a mobile, use +1 671 123 4567.+1 671 [7-digit local]. Example: +1 671 123 4567. There is no leading 0 + no per-village code — the single area code 671 covers the whole island.+1 671 123 4567. The same 671 code serves Tamuning, Dededo, Tumon + every other village.One tap to install. One more to call. It really is that simple.