---
title: "Guam Telephone Authority: MCC 310 MNC 033"
mcc: "310"
mnc: "033"
plmn: "310033"
operator: "Guam Telephone Authority"
country: "Guam"
country_iso: "GU"
region: "North America & Caribbean"
updated: "2025-04-09"
canonical: "https://mcc-mnc.org/networks/310_033"
---

# Guam Telephone Authority: MCC 310, MNC 033 (Guam)

**Guam Telephone Authority** is a mobile network in [Guam](https://mcc-mnc.org/countries/guam.md) (North America & Caribbean), identified by MCC **310** and MNC **033**: PLMN ID 310033, also written 310-033 or 310 033.

## Identifiers

| Field | Value |
|---|---|
| MCC (Mobile Country Code) | 310 |
| MNC (Mobile Network Code) | 033 |
| PLMN ID (MCC+MNC) | 310033 |
| TADIG code | — |
| Brand | — |
| Operator | Guam Telephone Authority |
| Country | Guam (GU) |
| Region | North America & Caribbean |
| Dialling code | — |
| Technologies | — |
| Last updated | 2025-04-09 |

## Technologies & bands

No bands on file for this network.

## Voice & calling services

| Service | Status | Source |
|---|---|---|
| VoLTE | Unknown | — |
| VoWiFi | Unknown | — |
| ViLTE | Unknown | — |
| VoNR | Unknown | — |

A service not marked Supported or Not supported is unknown: no data either way, not a sign that the network lacks it.

## About Guam Telephone Authority

The Guam Telephone Authority (GTA), operating in Guam, a US territory in North America & Caribbean, is a major mobile network provider. Officially identified by the Mobile Country Code (MCC) 310, shared with the United States, and Mobile Network Code (MNC) 33, GTA offers a range of telecommunications services to residents and businesses on the island. As a key player in Guam's connectivity landscape, GTA competes with other mobile operators to deliver voice, data, and other services, contributing significantly to the island's communication infrastructure.

GTA's presence is crucial for connecting Guamanians, allowing them to stay in touch with family, conduct business, and access information in an increasingly digital world. The 310 MCC designation underscores Guam's integration within the North American Numbering Plan and telecommunications standards. While other operators may exist on Guam, GTA, with its established infrastructure and services identified uniquely by MNC 33, plays a vital role in maintaining the island's connection to the wider world. As technology evolves, it's clear that GTA remains a crucial utility provider.

## Other networks in Guam

| MCC | MNC | Network | TADIG |
|---|---|---|---|
| 310 | 032 | [IT&E Wireless](https://mcc-mnc.org/networks/310_032.md) | — |
| 310 | 140 | [GTA Wireless](https://mcc-mnc.org/networks/310_140.md) | — |
| 310 | 400 | [iConnect](https://mcc-mnc.org/networks/310_400.md) | — |
| 310 | 480 | [iConnect](https://mcc-mnc.org/networks/310_480.md) | — |
| 311 | 120 | [iConnect](https://mcc-mnc.org/networks/311_120.md) | — |
| 311 | 250 | [iConnect](https://mcc-mnc.org/networks/311_250.md) | — |

MCC 310 is also used outside Guam: see [every network on MCC 310](https://mcc-mnc.org/mcc/310.md).

---

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