Japan
JapanJP
PLMN ID · 44054
Technology
2G · 4G on this network
Record
Updated 2025-04-09
- Brand
- au
- Operator
- KDDI Corporation
- Country
- Japan(JP)
- Region
- Asia & Middle East
- 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
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MVNOs
Add an MVNOMVNOs sell their own SIMs and plans but run on au's network rather than owning one.
| Brand | Calling | APNs | |
|---|---|---|---|
| J:COM MOBILE | |||
| povo | |||
| UQ mobile |
Regional Global SIM using au's numbering
Cell towers
Last measured 2026-09-17
22,521
Cells
1,081
Location areas
327,773
Measurements
2022
First measured
Measured 5G cells on this network, but no 5G band is on record. Add the band if you know it.
Find a cell on this network
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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, 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.
APN settings
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Change history
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