Finland: FUNET X.500 directory service
 Finland: Helsinki University of Technology
 Finland: Technical Research Center 
 Finland: Univ. of Helsinki E-mail address search (Give surname)
 Finland: X.500 University of Helsinki Search (Give surname)
 Netfind Searches for E-mail addresses (CZ)
 Netfind search for Internet E-mail contacts
 Netfind searches for E-mail addresses (AUS)
 Netfind searches for E-mail addresses (USA)
 Phonebooks worldwide
 Search BAD (Bionaut Address Database) (USA)
 Search European IP database for E-mail contacts
 Searching For Biologists (DOE, NIH, NSF, USDA)
 United Kingdom: X.500 directory service