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SMS Checker

Category: Mobile Carriers

au (KDDI): Official SMS Senders & Numbers - Is That SMS Genuine?

Officially sends SMS

Do they send SMS? (Official statements)

KDDI's official FAQ states it sends survey-request SMS from "157". A full list of sender numbers for all notifications is not published.

Officially published senders

Sender phone numbers / codes

  • 157

157 is listed in the official FAQ as the sender of survey-request SMS. Sender numbers for other notifications are not published.

Conversely, a message showing a listed name or number is NOT necessarily genuine: SMS sender displays can be spoofed. The safest approach is to avoid links in the message and check directly via the official app or a bookmarked official website.

Key points from official statements

  • The official FAQ states that survey URLs in SMS from 157 begin with https://voice.au.com/, a legitimate KDDI URL.
  • KDDI advises not to use contact details in suspicious messages and to check billing directly in My au.

Legitimate domains (confirmed on the source pages)

  • au.com
  • kddi.com

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Sources (official pages)

Primary sources verified on: 2026-08-02

Other organizations in this category

NTT DOCOMO

Related tools & pages

How to use this list correctly (disclaimer)

A sender not on this list is NOT necessarily a scam. Companies may add or change senders without notice, and legitimate SMS may arrive from numbers or names that are not officially published.

Conversely, a message showing a listed name or number is NOT necessarily genuine: SMS sender displays can be spoofed. The safest approach is to avoid links in the message and check directly via the official app or a bookmarked official website.

The content reflects what was published on the official pages as of each entry's verification date. Always check the linked official pages for the latest information.