regex101: Regrex email 64@255.2

Pro

^start of string

Group 1([a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]{1,64}@([a-zA-Z0-9-]+.[a-zA-Z0-9-]{2,}){1,255}){1,320}

{1,320}repeats the group contents below between 1 and 320 times:

Character Class[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]{1,64}

{1,64}matches between 1 and 64 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

#the literal # (35₁₀ / 43₈ / 23₁₆)

$the literal $ (36₁₀ / 44₈ / 24₁₆)

%the literal % (37₁₀ / 45₈ / 25₁₆)

&the literal & (38₁₀ / 46₈ / 26₁₆)

’the literal ’ (8217₁₀ / 20031₈ / 2019₁₆)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

^the literal ^ (94₁₀ / 136₈ / 5E₁₆)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

`the literal ` (96₁₀ / 140₈ / 60₁₆)

{the literal { (123₁₀ / 173₈ / 7B₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 2([a-zA-Z0-9-]+.[a-zA-Z0-9-]{2,}){1,255}

{1,255}repeats the group contents below between 1 and 255 times:

Character Class[a-zA-Z0-9-]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

.any character (except for line terminators)

Character Class[a-zA-Z0-9-]{2,}

{2,}matches at least 2 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

$end of string

26 tokens

Regular Expression

^([a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]{1,64}@([a-zA-Z0-9-]+.[a-zA-Z0-9-]{2,}){1,255}){1,320}$

New

qwertyuiopqwertyuiopqwertyuiopqwertyuiopqwertyuiopqwertyuiopqwer@b.cc

Substitution

qwertyuiopqwertyuiopqwertyuiopqwertyuiopqwertyuiopqwertyuiopqwer@b.cc