| Switchboard | Yahoo! People Search | World Email | AnyWho | |
|---|---|---|---|---|
| Truncation | 1st name always, last name only when 1st is omitted | 1st name by default, can be disabled | Yes, by default | Yes (Begins With:): 1st & last names, street, city & ZIP |
| Reverse Search | No | Yes | Yes | Yes |
| Limit Retrieval by Field | Persons: city & state, state only, affil.; Businesses: category, city & state, state only | Yes (all fields optional) | State, occupation, country | Yes (all fields optional) |
| Entry User Modifiable | Yes | Yes | Yes | Yes |
| Other Privacy Measures | Printing only with "Print Screen" or copy/paste; residential listing can be deleted by user; E-mail selectively divulged ("Knock-Knock") | Residential listing deleted upon receipt of E-mail request | [NA]1 | ID & password required for update |
| Data Source Divulged | Yes; infoUSA | No | Yes; De Postel BV | Yes; USPS (new & changed listings) |
| Data Update | Twice annually | Quarterly (telephone) | [NA] | Monthly (USPS) |
| Case Sensitive | [NA] | No | No | No |
| Boolean Logic | OR is default | AND is default | AND is default | AND is default |
| Stop Words/Characters Given | No | Yes | Yes | No |
1Information Not Available from engine's web pages.