TNZ's online Address Book is great for managing contacts -

1. Contacts are managed using the online Address Book
2. View contacts and send messages wherever you are, from a desktop or mobile phone without needing to upload a spreadsheet
3. Personalise messages with contact names and custom values
4. Deep integration into the TNZ ecosystem means contact names are displayed on reports
5. Contact lists can easily be imported and exported using CSV, XLS and XSLX