As a part of EURid’s service, it is possible for registrars to get information about the domain names they have registered via the on-line registration interface. Until recently, this feature was returning more information than strictly needed, namely the sequence number of the domain name asked for and by using this sequence number registrars were able to extract lists of names.

This is no longer possible.

While it was still available, the feature did not affect the registration system in any way and as such did not jeopardise the fairness of the system since all accredited registrars had the same possibilities.

As soon as this extraneous side effect of the online service was recognised, EURid removed it.