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_nomap

The underscore nomap suffix in SSID indicates your desire to opt-out of Wi-Fi positioning systems and, in some cases, mass surveillance. This used to be a not so great blog-post and has since became a hopefully better note to whoever it may concern

_nomap in the end of your SSID will exclude your network from Google, Apple, WiGLE etc. Wikipedia has a more complete list of supporting services.

Microsoft has a separate location services opt-out which uses MAC addresses instead.

Hidden SSID won’t work for opt-out in some of those services. Refer to n/hiddenssid.

Automaattinen sisällysluettelo / Automatically generated Table of Contents

Why?

Privacy. WiGLE.net may point your home directly just by entering the SSID and who knows how many similar services there are. While I have been thinking of this since 2015, there is at least one case where this has been used in 2018:

In the second quarter of 2024, researchers found that Apple allows tracking Wi-Fi networks that hadn’t opted out, including Starlink terminals in Ukraine and Gaza.

_optout

Legacy from 2015-2016. Used to be part of Microsoft WiFi Sense that shared WiFi networks and passwords to all contacts.

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