A Guam number gives your business a local presence with country code +1. Inside Guam, callers dial the trunk prefix 1 before the area code. From abroad, callers dial +1 and drop the 1.
Number types in Guam
- Local numbersGeographic numbers with a city or regional area code. Customers see a familiar local number and call you at local rates.
- Mobile numbersNumbers from mobile ranges, for services that need a mobile-looking number. SMS capability depends on the range.
- Toll-free numbersFree for your callers from most networks. You cover the inbound cost, which lowers the barrier for sales and support calls.
Local numbers by city
Toll-free prefixes
Guam numbering at a glance
| Country code | +1 |
|---|---|
| Trunk prefix | 1 |
| International call prefix | 011 |
| Geographic number length | 10 digits after the country code |
| Mobile number length | 10 digits |
| Example landline format | +1 671-300-1234 |
| Number types in the plan | Local, mobile and toll-free |
| Capital | Hagatna |
| Official languages | English, Chamorro |
| Currency | USD |
| Time zone | Pacific/Guam |
What you get with every Guam number
- Delivery to your SIP trunk, IP-PBX, Microsoft Teams (Direct Routing), softphone or any mobile number
- Time-of-day routing, failover destinations and simultaneous ring
- Real-time call records and usage in the customer portal
- Number porting in and out, where the Guam regulator allows it
Requirements for Guam numbers
Some Guam number ranges require proof of a business or residential address, or company registration documents. You will see exactly what is needed for the number you choose before you pay, and you can upload documents in the portal. How verification works.
Frequently asked questions
Can I get a Guam number if my business is based elsewhere?
Often, yes. Many Guam ranges are available to international businesses; others need a local address. The requirement is shown on each number before checkout.
How do people abroad call a Guam number?
They dial their international access code (or + on a mobile), then 1, then the number without the leading 1. For example: +1 671-300-1234.
Can I move my existing Guam number to you?
In most cases, yes. Contact sales with the number and current provider and we will confirm portability and timing.
Which Guam cities can I get a local number in?
We list local area codes for 1 Guam cities and regions, including Tamuning. Live stock is shown on each city page.