FieldLengths

An E.164-compliant delimited phone number minimum and maximum length. Note that the minimum length can vary and the lowest possible value is specified here. The maximum length is derived from the assumption that no more than 5 delimiters may be used (not in the standard).

A range of values the length of an email can take The RFC-5322 standard does not specify an exact limit on the maximum length of the email, however, it recommends that the email is no longer than 256 characters as longer emails are not exactly useful to have.

An E.164-compliant numeric (no delimiters) phone number minimum and maximum length. Note that the minimum length can vary and the lowest possible value is specified here.

A Bcrypt hash compliant password lengths with a sensible upper limit of 48 chars A minimum length of a password using BCRYPT algorithm has to be at least 8 characters, as all other password lengths can be cracked in seconds using the hash of the password using moder algorithms.

The smallest possible, most commonly used minimum and maximum url lengths in web browsers. The value of 2048 is mostly used by IE up to 7.0. The urls can be as small as one-character long.