EU826010755 and Amazon (AWS) EU826009064
ATU99999999
BE09999999XX
BE0999999999
BE1999999999
BG999999999 ou
BG9999999999
CY99999999L
CZ99999999 ou
CZ999999999 ou
CZ9999999999
DE999999999
DK99 99 99 99
EE999999999
EL999999999
ESX9999999X
FI99999999
FRXX 999999999
HR99999999999
HU99999999
IE9S99999L
IE9999999WI
IT99999999999
LT999999999 ou
LT999999999999
LU99999999
LV99999999999
MT99999999
NLSSSSSSSSSSSS
PL9999999999
PT999999999
RO999999999
SE999999999999
SI99999999
SK9999999999

XI999 9999 99 or
XI999 9999 99 9995 or
XIGD9996 or
XIHA9997

VAT number format: "NO"+9 digits and the letters "MVA", which indicates VAT registration, e.g. NO123456789 MVA

https://www.avalara.com/vatlive/en/eu-vat-rules/eu-vat-number-registration/eu-vat-number-formats.html

AT  U12345678
BE  1234567890
BG  123456789, 1234567890
HR  12345678901
CY  12345678X
CZ  12345678 123456789 1234567890
DK  12345678
EE  123456789
FI  12345678
FR  12345678901 
FR  X1234567890 
FR  1X123456789 
FR  XX123456789
DE  123456789
EL  123456789
HU  12345678
IE  1234567WA (companies) 1234567FA (individuals)
IT  12345678901
LV  12345678901
LT  123456789 123456789012
LU  12345678
MT  12345678
NL  123456789B01 or 
NL 123456789BO2  (a noter qu'il y a une erreur ici)
NO 123456789MVA  Norway (non-EU) 
PL  1234567890
PT  123456789
RO  1234567890
SK  1234567890
SI  12345678
ES  X12345678
ES 12345678X 
ES X1234567X
SE  123456789012
CHE  123.456.789 IVA
CHE  123.456.789 TVA
CHE  123.456.789 MWST
GB  123456789

(il manque les XI...)
RUE DE FRANCHE-COMTE 99

https://viesapi.eu/test-vies-api/

PL7272445205
PL5213003700
PL5252242171
PL7171642051
DE327990207
FR10402571889
DK56314210
ES38076731R
PT501613897
CZ7710043187
IT06903461215
BG202211464
HU29312757
RO14388698
EL801116623
FI23064613
HR79147056526
LT100005828314
LV40203202898
SK2022210311
NL863726392B01
BE0835221567
ATU74581419
CY10137629O
EE100110874
IE8251135U
LU22108711
MT26572515
SE556037867001
SI51510847