In a development which was first noted on Gervase Markham's blog on Saturday, and later on Forbes, social network Facebook has recently updated default e-mail addresses on the profiles of its over 900 million users.

While some of the Facebook users were apparently unaware of the fact that they have a "@facebook.com" e-mail address, the change which the social network brought about over this past weekend witnessed that address set as the default on their user profiles.

Though Facebook had quietly rolled out its @facebook.com e-mail addresses in 2010, the recent move underscores that the change has now been brought on for the default addresses of all the users of the social network.

In the case of those Facebook users who had made "vanity" Facebook addresses which comprised a username, the default@facebook.com e-mail address will include that username; but for those who had not made such addresses, the e-mail address is a random number "at" facebook. com.

Noting that the move to update addresses on Facebook will essentially make the addresses "consistent across our site," a Facebook spokesman said that the social network had announced the efforts in this direction in April, though it had not specified when the default move would be put into place.

The spokesman further added that along with ensuring that all users receive an address, Facebook was also rolling out "a new setting that gives people the choice to decide which addresses they want to show on their timelines."