regex101: Python Match Workspace

Pro

(?xi)applies the following effective flags to the remainder of the pattern: gmxi

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

^start of line

Group 1( (DE)?[0-9]{9}|)

1st Alternative (DE)?[0-9]{9}

Group 2(DE)?

?repeats the group contents below at most once:

DEthe literal text DE (case insensitive)

Character Class[0-9]{9}

{9}matches exactly 9 characters from the set below:

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

2nd Alternative — matches an empty string

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

25 tokens

Regular Expression

(?xi)^( (DE)?[0-9]{9}|)$

New

ATU99999999
BE0999999999
BG999999999
HR12345678901
CY99999999L
CZ12345678
DK99999999
EE123456789
FI99999999
FRXX999999999
DE999999999
EL123456789
HU12345678
IE1S23456L
IE1234567T
IE1234567TW
IE1234567FA
ESA12345678
ESZ1234567E
DE813992525

Extraction

ATU99999999
BE0999999999
BG999999999
HR12345678901
CY99999999L
CZ12345678
DK99999999
EE123456789
FI99999999
FRXX999999999
DE999999999
EL123456789
HU12345678
IE1S23456L
IE1234567T
IE1234567TW
IE1234567FA
ESA12345678
ESZ1234567E
DE813992525