---
title: "au: MCC 440 MNC 50"
mcc: "440"
mnc: "50"
plmn: "44050"
brand: "au"
operator: "KDDI Corporation"
country: "Japan"
country_iso: "JP"
region: "Asia & Middle East"
technologies: ["2G", "4G"]
updated: "2025-04-09"
canonical: "https://mcc-mnc.org/networks/440_50"
---

# au: MCC 440, MNC 50 (Japan)

**au** (operator: KDDI Corporation) is a mobile network in [Japan](https://mcc-mnc.org/countries/japan.md) (Asia & Middle East), identified by MCC **440** and MNC **50**: PLMN ID 44050, also written 440-50 or 440 50. It runs 2G and 4G. Calling: VoLTE: Likely.

## Identifiers

| Field | Value |
|---|---|
| MCC (Mobile Country Code) | 440 |
| MNC (Mobile Network Code) | 50 |
| PLMN ID (MCC+MNC) | 44050 |
| TADIG code | — |
| Brand | au |
| Operator | KDDI Corporation |
| Country | Japan (JP) |
| Region | Asia & Middle East |
| Dialling code | — |
| Technologies | 2G, 4G |
| 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) | — |
| 3G | No bands on file | 5 |
| 4G | [LTE 700](https://mcc-mnc.org/coverage/lte_700.md), [LTE 2100](https://mcc-mnc.org/coverage/lte_2100.md), [LTE 850](https://mcc-mnc.org/coverage/lte_850.md), [TD-LTE 3500](https://mcc-mnc.org/coverage/td-lte_3500.md), [LTE 1500](https://mcc-mnc.org/coverage/lte_1500.md) | — |
| 5G | No bands on file | 1 |

## Voice & calling services

| Service | Status | Source |
|---|---|---|
| VoLTE | Likely | Network publishes an IMS APN |
| 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

KDDI Corporation, operating under the brand name "au," is a prominent mobile network operator in Japan, identifiable by its Mobile Country Code (MCC) of 440 and Mobile Network Code (MNC) of 50. As one of the leading telecommunications companies in the country, au provides a wide range of services, including mobile phone services, internet access, and fixed-line communications.  Au competes directly with other major Japanese mobile carriers like NTT Docomo and SoftBank, offering diverse plans and technologies to cater to a large consumer base. Their network infrastructure supports various technologies, from legacy standards to cutting-edge 5G connectivity throughout Japan.

Operating within a highly competitive and technologically advanced market like Japan, au continuously invests in innovation and network upgrades. Japan, located within Asia and Middle East for tracking purposes, is known for its early adoption of new mobile technologies, so staying ahead of the curve here is paramount. This includes expanding 5G coverage, enhancing network speeds, and developing new services that leverage the capabilities of the latest mobile technologies.  au has a history of pioneering advancements in mobile communication, and their ongoing efforts contribute to Japan's position as a global leader in telecommunications. Their MCC 440 and MNC 50 ensures unique identification and operation within the Japanese mobile ecosystem.

## MVNOs on au

- [UQ mobile](https://mcc-mnc.org/mvno/uq-mobile.md)

## APN settings

| Name | APN | Types | Protocol | Source |
|---|---|---|---|---|
| IMS | `ims` | ims | IPV4V6 | LineageOS |

Settings come from Android's AOSP and LineageOS APN lists and user corrections.

## Android carrier config highlights

| Setting | Value | Key |
|---|---|---|
| Allow emergency numbers in call log | Yes | `allow_emergency_numbers_in_call_log_bool` |
| Call settings over Ut/XCAP | Yes | `carrier_supports_ss_over_ut_bool` |
| 5G icon display grace period | connected_mmwave,legacy,31;connected,legacy,31;connected_mmwave,not_restricted_rrc_con,31;connected,not_restricted_rrc_con,31;not_restricted_rrc_idle,not_restricted_rrc_con,15 | `5g_icon_display_grace_period_string` |
| 5G icon rules | connected_mmwave:5G,connected:5G,not_restricted_rrc_idle:5G | `5g_icon_configuration_string` |
| NR timers reset if non endc and rrc idle | Yes | `nr_timers_reset_if_non_endc_and_rrc_idle_bool` |
| Default MTU | 1420 | `default_mtu_int` |
| Show 4G for LTE data icon | Yes | `show_4g_for_lte_data_icon_bool` |
| Disable DUN APN while roaming with preset APN | Yes | `disable_dun_apn_while_roaming_with_preset_apn_bool` |
| Carrier name overridden | Yes | `carrier_name_override_bool` |
| Carrier name override | au | `carrier_name_string` |

## Cell towers

OpenCelliD has measured **6** cells on this network across 4 location/tracking areas, first seen 2025-05-23 and last seen 2025-12-23 (data as of 2026-09-27).

| Radio | Generation | Cells |
|---|---|---|
| UMTS | 3G | 5 |
| NR | 5G | 1 |

Locate a single cell by MCC, MNC, LAC/TAC and cell ID with the https://mcc-mnc.org/cell-id-lookup tool, `GET /api/v1/cells` or the MCP `lookup_cell` tool. Cell data from OpenCelliD (https://opencellid.org), licensed CC BY-SA 4.0.

## 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 | 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 | 78 | [au](https://mcc-mnc.org/networks/440_78.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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