What are the MCC and MNC codes in Guam?
Every mobile network in Guam shares Mobile Country Codes (MCC) 310 and 311 — the three-digit prefix that opens every PLMN broadcast by a Guam SIM. The country's international dialling prefix is +1, which is distinct from the MCC: 310 / 311 identifies the country inside the network, while +1 routes voice calls. Under ISO 3166 Guam is coded GU / GUM / 316. This page lists 5 mobile networks across 9 PLMN codes operating in Guam, with each network's MNC, full PLMN, operator, status and market share.
| MCC | MNC | PLMN | Operator | Status | Market share |
|---|---|---|---|---|---|
| 310 | 032, 120, 250, 400, 480 | 310032, 310400, 310480, 311120, 311250 | IT&E Wireless IT&E Overseas, Inc | Operational | — |
| 310 | 033 | 310033 | Guam Telephone Authority | Unknown | — |
| 310 | 140 | 310140 | GTA Wireless Teleguam Holdings, LLC | Operational | — |
| 310 | 370 | 310370 | Docomo NTT DoCoMo Pacific | Operational | — |
| 310 | 470 | 310470 | Docomo NTT DoCoMo Pacific | Unknown | — |
Frequently asked questions
- What is the MCC of Guam?
- Guam uses more than one Mobile Country Code (MCC): 310 and 311. A SIM issued in Guam broadcasts a PLMN beginning with one of these three-digit codes.
- What is Guam's country calling code?
- Guam's international dialling prefix is +1. Note that this is separate from the MCC (310 / 311): the calling code routes voice calls, while the MCC identifies the country inside the mobile network.
- How many mobile networks are in Guam?
- This registry lists 5 operators for Guam, covering 9 PLMN codes in total — including MNOs, MVNOs and reserved allocations.
- How do I read a Guam PLMN?
- A PLMN such as 310032 is simply the MCC and MNC joined together: 310 (Guam) followed by 032 (IT&E Wireless). The first three digits are always the country's MCC; the remaining two or three digits are the network's MNC.
Keep exploring
What is MCC / MNC? · See Guam in the full registry · Free JSON API · About the data