A system, method and computer program product for a user to verify that a network resource address is trusted. At least one entity registration is stored at a server. Each entity registration comprises an identity of an entity and entity addressing information associated with the identity of the entity. The existence of at least one entity whose identity is included in the at least one entity registration is confirmed. A query comprising a target addressing information is received from a client. If the target addressing information matches the entity addressing information, the identity of the entity associated with the entity addressing information is determined and a result comprising the identity of the entity associated with the entity addressing information matching the target addressing information is transmitted to the client. If no entity addressing information matches the target addressing information, an indication of such is transmitted to the client.