/ Published in: Regular Expression
(Created for JavaScript)
These are rather forgiving. Spaces, dashes, or periods are allowed as separators. Extensions can be recognized by several strings (#, x, x., ext, ext., extension).
Area code: $1$2
Exchange code: $3
Station code: $4
Extension / Extra characters: $5
Separators are not accepted within the $3$4$5 portion of a vanity number.
Example: (540) 555-0123 ext.678 --> `($1$2) $3-$4 ext.$5`
Example: 1-800-GOODFOOD --> `1-$1$2-$3$4$5`
These are rather forgiving. Spaces, dashes, or periods are allowed as separators. Extensions can be recognized by several strings (#, x, x., ext, ext., extension).
Area code: $1$2
Exchange code: $3
Station code: $4
Extension / Extra characters: $5
Separators are not accepted within the $3$4$5 portion of a vanity number.
Example: (540) 555-0123 ext.678 --> `($1$2) $3-$4 ext.$5`
Example: 1-800-GOODFOOD --> `1-$1$2-$3$4$5`
URL: http://en.wikipedia.org/wiki/North_American_Numbering_Plan