English Yellow Pages
A searchable online phone directory in English.
http://www.intoitaly.it/

Enjoy Rome
An introduction to the Italian telephone system.
http://www.enjoyrome.com/telephones.html

Fodors.com
Covers dialing codes, operator assistance, phone cards, international calls and local calls.
http://www.fodors.com/features/stt/onbusiness/italy.cfm?page=Telephones&file=telephones

Frommer's
Essential advice on making international, domestic and local calls from Rome.
http://www.frommers.com/destinations/rome/0064020016.html

In Italy.com
Tips on using your mobile phone in Rome.
http://www.initaly.com/ads/cellphns.htm

Italian Tourism.com
Details the local area codes of Italian cities.
http://www.italiantourism.com/phone.html

Pagine Gialle
The Italian Yellow Pages online.
http://www.paginegialle.it/

Roman Homes
Find out how to rent a mobile phone while in Rome.
http://www.romanhomes.com/your_roman_vacation/mobile_phone.htm

Rome About.com
Cell phone hire and telephone calling card specialist.
http://www.romeabout.com/

Telephones in Rome...
Advice on making international calls from Rome.
http://www.miracleplayers.org/visitingrome/telephones_in_rome.htm