| 2025-06-25 | 907, for a high one |
| 2025-05-05 | 406, for the entire state of Montana |
| 2025-02-18 | 918 or 539, on the Cherokee Nation |
| 2020-07-16 | Numerical trio |
| 2018-12-19 | One of seven for New York City |
| 2016-10-02 | Three before seven? |
| 2010-07-08 | Prefix with triple digits |
| 2009-01-09 | Prefix in parentheses |
| 2007-03-23 | Parenthetical information |
| 2005-05-08 | Parenthetical information |
| 2004-03-12 | Locale identifier |
| 2002-03-01 | Opening number |
| 2002-01-16 | 201, e.g. |
| 2000-07-01 | Regional figure |
| 2000-01-23 | Parenthetical figure |
| 1999-10-29 | Information information |
| 1998-11-05 | Three before seven |
| 1998-10-24 | Customer file entry |
| 1998-05-01 | Three-digit number |
| 1998-04-17 | Three before seven |
| 1997-07-12 | Important prefix |
| 1996-02-18 | Prefix, of sorts |
| 1996-01-20 | 409, e.g. |
| 1996-01-07 | Figures out at the beginning? |
| 1995-01-19 | Hawaii's is 808 |
| 1994-05-22 | 201 or 202, e.g. |
| 1994-02-04 | Number after 1? |