Japan/Asia & Middle East

au

OperatorKDDI Corporation

2G4G
Suggest an edit
LocationJapanJP
Japan landscape

PLMN ID · 44053

440
mcc
Japan
53
mnc
au

MCC

Mobile Country Code

MNC

Mobile Network Code

PLMN

MCC + MNC

TADIG

Not on file

GSMA roaming code

Technology

2G · 4G on this network

2G
0cell towers

2 bands

3G
0cell towers

Not on record

4G
28,777cell towers

5 bands

5G
0cell towers

Not on record

Record

Updated 2025-04-09

Brand
au
Operator
KDDI Corporation
Country
Japan(JP)
Dialling code
—
Mobile Country Code
All 29 networks on MCC 440
Mobile Network Code
PLMN ID
What is a PLMN ID?
TADIG code
—
Technologies
2G · 4G7 bands on file
VoLTE (4G calling)
UnknownTell us
Wi-Fi calling
UnknownTell us
Video calling
UnknownTell us
VoNR (5G calling)
UnknownTell us
Status
Live

> This record is community-maintained. Spotted something wrong? Suggest an edit.

MVNOs sell their own SIMs and plans but run on au's network rather than owning one.

No virtual operators on record for au. Know one that runs here? Add it.

Cell towers

Last measured 2026-09-17

28,777

Cells

1,561

Location areas

554,345

Measurements

2020

First measured

LTE 4G28,777100%

Crowd-sourced cell measurements from OpenCelliD, licensed CC BY-SA 4.0 · as of 2026-09-27. Counts are cells people have measured, not an operator's own figures.

About au

KDDI Corporation au, operating under the brand name "au," is a major mobile network operator in Japan. Identified by its Mobile Country Code (MCC) of 440 and Mobile Network Code (MNC) of 53, au provides a comprehensive suite of telecommunications services to a large portion of the Japanese population. As one of the "big three" mobile carriers in Japan, alongside NTT Docomo and SoftBank, au competes fiercely in a market known for its technological innovation and high customer expectations. KDDI offers 4G LTE and has been actively deploying 5G services, striving to deliver ultra-fast connectivity and enhanced mobile experiences across the nation. Beyond mobile services, KDDI's "au" brand is heavily ingrained within the daily lives of locals, it is a national institution in Japan. It offers a range of integrated services, including fixed-line internet, cable television, and e-commerce platforms. KDDI is known for its innovative marketing campaigns and partnerships, often collaborating with popular anime and entertainment franchises. The company plays a crucial role in Japan's technology landscape, contributing significantly to the country's advancements in mobile communication and digital infrastructure within the broader Asia and Middle East region.

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