| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| 2000 CodeTracker Area Code Map: area codes of US, Canada and parts of the Caribbean | 978-1-930242-00-5 (1-930242-00-X) | 1999 | Thomas Master |
| 2005 Complete US Zip-Area Code Directory: 3-Way Easy Lookup for All US Zip Codes and Area Codes | 978-1-930242-27-2 (1-930242-27-1) | 2004 | |
| 2006/7 Complete US ZIP-Area Code Directory: 3-Way Easy Lookup for All US ZIP Codes and Area Codes | 978-1-930242-29-6 (1-930242-29-8) | 2005 | |