Technical and privacy enquiries

What is homoglyph bundling? Does EURid offer it?

Depending on the script and font used, domain names can look similar to one another. In fact, certain characters or glyphs have shapes that appear to be identical or might be hard to differentiate at first glance. Domain names are considered homoglyphs of each other if all the characters in one domain name are homoglyphs of all the characters of the other domain names, in their respective positions.


A Homoglyph Bundle is a set of domain names that are all homoglyphs of each other.


Certain registries have adopted policies to deal with homoglyph bundles. EURid's approach is to ensure that once a domain name from a particular homoglyph bundle is registered, it is not possible to register any other domain name belonging to the same bundle.


This approach aims to reduce the risk of confusion created by domain names that may appear to be similar.

Since the launch of the .eu TLD in the Cyrillic script on the 1 June 2016, the homoglyph bundling algorithm now takes into account legacy domain names (such as юю.eu). As long as legacy Cyrillic domain names exist (i.e. domain names consisting of Cyrillic characters but with a Latin extension), homoglyph bundling will not take into account the extension when determining whether one domain name belongs to the same homoglyph bundle as another.


Please note that EURid has not permitted script mixing since the launch of IDNs, in order to reduce the confusion risk associated with similar domain names.