---
title: "au: MCC 440 MNC 78"
mcc: "440"
mnc: "78"
plmn: "44078"
brand: "au"
operator: "Okinawa Cellular Telephone"
country: "Japan"
country_iso: "JP"
region: "Asia & Middle East"
technologies: ["2G"]
updated: "2025-04-09"
canonical: "https://mcc-mnc.org/networks/440_78"
---

# au: MCC 440, MNC 78 (Japan)

**au** (operator: Okinawa Cellular Telephone) is a mobile network in [Japan](https://mcc-mnc.org/countries/japan.md) (Asia & Middle East), identified by MCC **440** and MNC **78**: PLMN ID 44078, also written 440-78 or 440 78. It runs 2G.

## Identifiers

| Field | Value |
|---|---|
| MCC (Mobile Country Code) | 440 |
| MNC (Mobile Network Code) | 78 |
| PLMN ID (MCC+MNC) | 44078 |
| TADIG code | — |
| Brand | au |
| Operator | Okinawa Cellular Telephone |
| Country | Japan (JP) |
| Region | Asia & Middle East |
| Dialling code | — |
| Technologies | 2G |
| Last updated | 2025-04-09 |

## Technologies & bands

| Generation | Bands | Measured cells |
|---|---|---|
| 2G | [CDMA 850](https://mcc-mnc.org/coverage/cdma_850.md), [CDMA 2100](https://mcc-mnc.org/coverage/cdma_2100.md) | — |

## 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 au

Okinawa Cellular Telephone, operating under the brand "au Okinawa Cellular," is a significant mobile network operator in Japan, specifically serving the Okinawa Prefecture. Identified by its Mobile Country Code (MCC) of 440 and Mobile Network Code (MNC) of 78, it distinguishes itself within Japan's competitive telecommunications market. While mainland Japan sees dominant players like NTT Docomo, KDDI (au), and SoftBank, au Okinawa Cellular holds a particularly important role in providing connectivity to the unique geographical region of Okinawa. The network infrastructure allows for a robust service offering, delivering mobile voice, data and other telecommunications products.

As part of the KDDI group, au Okinawa Cellular benefits from the resources and expertise of one of Japan's leading telecommunications corporations. However, it also maintains a distinct regional focus, tailoring services and offerings to meet the specific needs of Okinawa's residents and businesses. The network actively participates in local community events and initiatives, demonstrating a commitment to Okinawa's economic and social development. Although operating within the broader context of the Japanese mobile landscape, with adherence to national regulations and standards, the regional emphasis of au Okinawa Cellular helps it connect uniquely with its local customer base.

## Other networks in Japan

| MCC | MNC | Network | TADIG |
|---|---|---|---|
| 440 | 00 | [Y Mobile](https://mcc-mnc.org/networks/440_00.md) | — |
| 440 | 01 | [UQ WiMAX](https://mcc-mnc.org/networks/440_01.md) | — |
| 440 | 02 | [Hanshin Cable Engineering Co., Ltd.](https://mcc-mnc.org/networks/440_02.md) | — |
| 440 | 03 | [IIJmio](https://mcc-mnc.org/networks/440_03.md) | — |
| 440 | 04 | [Japan Radio Company, Ltd.](https://mcc-mnc.org/networks/440_04.md) | — |
| 440 | 05 | [Wireless City Planning Inc.](https://mcc-mnc.org/networks/440_05.md) | — |
| 440 | 06 | [SAKURA Internet Inc.](https://mcc-mnc.org/networks/440_06.md) | — |
| 440 | 07 | [LTE-X, Inc.](https://mcc-mnc.org/networks/440_07.md) | — |
| 440 | 08 | [Panasonic Systems Solutions Japan Co., Ltd.](https://mcc-mnc.org/networks/440_08.md) | — |
| 440 | 09 | [Marubeni Wireless Communications Inc.](https://mcc-mnc.org/networks/440_09.md) | — |
| 440 | 10 | [NTT docomo](https://mcc-mnc.org/networks/440_10.md) | JPNDO |
| 440 | 11 | [Rakuten Mobile Network, Inc.](https://mcc-mnc.org/networks/440_11.md) | — |
| 440 | 12 | [Cable media waiwai Co., Ltd.](https://mcc-mnc.org/networks/440_12.md) | — |
| 440 | 20 | [SoftBank](https://mcc-mnc.org/networks/440_20.md) | JPNJP |
| 440 | 21 | [SoftBank](https://mcc-mnc.org/networks/440_21.md) | — |
| 440 | 50 | [au](https://mcc-mnc.org/networks/440_50.md) | — |
| 440 | 51 | [au](https://mcc-mnc.org/networks/440_51.md) | JPNKI |
| 440 | 52 | [au](https://mcc-mnc.org/networks/440_52.md) | — |
| 440 | 53 | [au](https://mcc-mnc.org/networks/440_53.md) | — |
| 440 | 54 | [au](https://mcc-mnc.org/networks/440_54.md) | — |
| 440 | 70 | [au](https://mcc-mnc.org/networks/440_70.md) | — |
| 440 | 71 | [au](https://mcc-mnc.org/networks/440_71.md) | — |
| 440 | 72 | [au](https://mcc-mnc.org/networks/440_72.md) | — |
| 440 | 73 | [au](https://mcc-mnc.org/networks/440_73.md) | — |
| 440 | 74 | [au](https://mcc-mnc.org/networks/440_74.md) | — |
| 440 | 75 | [au](https://mcc-mnc.org/networks/440_75.md) | — |
| 440 | 76 | [au](https://mcc-mnc.org/networks/440_76.md) | — |
| 440 | 91 | [Tokyo Organising Committee of the Olympic and Paralympic Games](https://mcc-mnc.org/networks/440_91.md) | — |
| 441 | 01 | [SoftBank](https://mcc-mnc.org/networks/441_01.md) | — |
| 441 | 10 | [UQ WiMAX](https://mcc-mnc.org/networks/441_10.md) | — |

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