Guam
Power & telecom standards in Guam
Connectivity Overview
Tempest Telecom offered dial-up internet access, WiFi hotspot access, toll-free dial-up access and broadband ethernet access in Guam. We also offered Iridium satellite Internet and Voice access in Guam for communications in rural areas without infrastructure.
Guam uses 120V at 60Hz. Power outlets are type A, B and telephone jacks are RJ-11.
Dial-up Internet Access
Tempest Telecom provided local dial-up access numbers in Guam at $0.255/minute. Toll-free numbers were also available at $.30/minute. Travelers could connect using any standard modem with an RJ-11 telephone adapter.
WiFi Hotspot Access
Tempest Telecom provided WiFi hotspot access in Guam at $19.95/day for unlimited browsing.
Adapters & Power
North American (Type A/B) plugs are compatible. An adapter may not be needed for US travelers.
Standard RJ-11 jacks are used. Most international modems will connect without an adapter.
Guam at a Glance
- Capital
- Hagatna
- Phone Code
- +1-671
- Voltage
- 120V / 60Hz
- Power Plug
- A, B
- Phone Jack
- RJ-11
- Currency
- USD
- Dial-up
- $0.255/min
- WiFi
- $19.95/day
About connectivity in Guam
Guam uses 110V/60Hz with Type A and Type B outlets — the North American standard reflecting the territory's status as a US unincorporated territory in the Western Pacific. The phone jack is RJ-11. GTA Teleguam and IT&E compete in the territory's telecom market alongside Docomo Pacific.
Guamanian commercial Internet emerged in the mid-1990s as part of US Pacific operations. The territory's small population (~170,000) and substantial US military presence (Andersen Air Force Base, Naval Base Guam) shaped infrastructure investment. The 2002 arrival of multiple undersea fiber-optic cables (Guam is a major Pacific cable-landing hub) substantially expanded international bandwidth.
The Guamanian prepaid international calling-card market through the 2000s served the substantial Chamorro and Filipino-American communities in Guam calling the broader Mariana Islands and the Philippines.
Tempest Telecom served Guam through dial-up POPs in Hagåtña. The substantial US military presence, the Pacific maritime industry, and the broader Micronesia regional customer base sustained Iridium demand. Guam's position as a Pacific telecom-cable hub made it a meaningful regional Tempest distribution gateway.
Modern Guam has expanding FTTH and mature 4G LTE / 5G coverage.
Tempest's services across Guam, 1997–2012
Tempest Telecommunications operated international connectivity services in Guam between 1997 and 2012 under a unified prepaid account that absorbed multiple service types onto a single customer credential. Customers in Guam drew from the same balance for pre-paid international voice calling, RADIUS-authenticated dial-up Internet roaming, metered Wi-Fi hotspot access, Iridium satellite voice, and Inmarsat BGAN data terminals. An attempted kiosk-payment federation (PATN, 1998) extended the same architecture to public Internet terminals but failed to reach scale.
Iridium satellite voice was available in Guam from approximately 2001 (post-bankruptcy relaunch). Thuraya coverage did not extend to Guam; Inmarsat BGAN data terminals filled the broadband gap from late 2005.
Nearby countries in Oceania
Cocos (Keeling) Islands · Cook Islands · Fiji · French Polynesia · Kiribati · Marshall Islands · Micronesia · Nauru