---
title: "au: MCC 440 MNC 54"
mcc: "440"
mnc: "54"
plmn: "44054"
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_54"
---

# au: MCC 440, MNC 54 (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 **54**: PLMN ID 44054, also written 440-54 or 440 54. It runs 2G and 4G.

## Identifiers

| Field | Value |
|---|---|
| MCC (Mobile Country Code) | 440 |
| MNC (Mobile Network Code) | 54 |
| PLMN ID (MCC+MNC) | 44054 |
| 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) | — |
| 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) | 18,933 |
| 5G | No bands on file | 3,588 |

## 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

KDDI Corporation, operating under the "au" brand, is a major mobile network operator in Japan, holding the Mobile Network Code (MNC) 54 under the Mobile Country Code (MCC) 440. As one of the leading telecommunications providers in the country, au competes directly with NTT Docomo and SoftBank, offering a comprehensive suite of mobile services, including voice, data, and multimedia applications to a substantial subscriber base throughout Japan, a nation renowned for its advanced technological infrastructure and keen adoption of new-gen mobile technologies.

Covering the islands of Japan in the Asia and Middle East region, KDDI au distinguishes itself through its commitment to innovation and customer experience. The network has been at the forefront of deploying advanced mobile technologies, from early adoption of 3G and LTE to its current rollout of 5G services. Furthermore, au often collaborates with international partners to stay ahead, developing unique handsets, and is popular for its integrated entertainment and content offerings. The company continues to invest heavily in network infrastructure to maintain its position as a key player in Japan's dynamic mobile market.

## MVNOs on au

- [J:COM MOBILE](https://mcc-mnc.org/mvno/j-com-mobile.md)
- [povo](https://mcc-mnc.org/mvno/povo.md)
- [UQ mobile](https://mcc-mnc.org/mvno/uq-mobile.md)

## 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 **22,521** cells on this network across 1,081 location/tracking areas, first seen 2022-07-02 and last seen 2026-09-17 (data as of 2026-09-27).

| Radio | Generation | Cells |
|---|---|---|
| LTE | 4G | 18,933 |
| NR | 5G | 3,588 |

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 | 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 | 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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