In mid 2022, an IBAN pattern for the Russian Federation (RU) was registered with SWIFT. This project has not (yet) adopted support for this pattern due to the war in Ukraine.

IbanNet supports 126 countries

SWIFT registry

See the SWIFT website for more information.

ISO country code	Country	Length	IBAN example	SEPA	Bank ID	Branch ID
AD	Andorra	24	AD12 0001 2030 2003 5910 0100	Yes
AE	United Arab Emirates (The)	23	AE07 0331 2345 6789 0123 456	No		-
AL	Albania	28	AL47 2121 1009 0000 0002 3569 8741	No
AT	Austria	20	AT61 1904 3002 3457 3201	Yes		-
AZ	Azerbaijan	28	AZ21 NABZ 0000 0000 1370 1000 1944	No		-
BA	Bosnia and Herzegovina	20	BA39 1290 0794 0102 8494	No
BE	Belgium	16	BE68 5390 0754 7034	Yes		-
BG	Bulgaria	22	BG80 BNBG 9661 1020 3456 78	Yes
BH	Bahrain	22	BH67 BMAG 0000 1299 1234 56	No		-
BI	Burundi	27	BI42 1000 0100 0100 0033 2045 181	No
BR	Brazil	29	BR18 0036 0305 0000 1000 9795 493C 1	No
BY	Republic of Belarus	28	BY13 NBRB 3600 9000 0000 2Z00 AB00	No		-
CH	Switzerland	21	CH93 0076 2011 6238 5295 7	Yes		-
CR	Costa Rica	22	CR05 0152 0200 1026 2840 66	No		-
CY	Cyprus	28	CY17 0020 0128 0000 0012 0052 7600	Yes
CZ	Czechia	24	CZ65 0800 0000 1920 0014 5399	Yes		-
DE	Germany	22	DE89 3704 0044 0532 0130 00	Yes		-
DJ	Djibouti	27	DJ21 0001 0000 0001 5400 0100 186	No
DK	Denmark	18	DK50 0040 0440 1162 43	Yes		-
DO	Dominican Republic	28	DO28 BAGR 0000 0001 2124 5361 1324	No		-
EE	Estonia	20	EE38 2200 2210 2014 5685	Yes		-
EG	Egypt	29	EG38 0019 0005 0000 0000 2631 8000 2	No
ES	Spain	24	ES91 2100 0418 4502 0005 1332	Yes
FI	Finland	18	FI21 1234 5600 0007 85	Yes		-
FK	Falkland Islands	18	FK88 SC12 3456 7890 12	No		-
FO	Faroe Islands	18	FO62 6460 0001 6316 34	No		-
FR	France	27	FR14 2004 1010 0505 0001 3M02 606	Yes
GB	United Kingdom	22	GB29 NWBK 6016 1331 9268 19	Yes
GE	Georgia	22	GE29 NB00 0000 0101 9049 17	No		-
GI	Gibraltar	23	GI75 NWBK 0000 0000 7099 453	Yes		-
GL	Greenland	18	GL89 6471 0001 0002 06	No		-
GR	Greece	27	GR16 0110 1250 0000 0001 2300 695	Yes
GT	Guatemala	28	GT82 TRAJ 0102 0000 0012 1002 9690	No		-
HN	Honduras	28	HN88 CABF 0000 0000 0002 5000 5469	No		-
HR	Croatia	21	HR12 1001 0051 8630 0016 0	Yes		-
HU	Hungary	28	HU42 1177 3016 1111 1018 0000 0000	Yes
IE	Ireland	22	IE29 AIBK 9311 5212 3456 78	Yes
IL	Israel	23	IL62 0108 0000 0009 9999 999	No
IQ	Iraq	23	IQ98 NBIQ 8501 2345 6789 012	No
IS	Iceland	26	IS14 0159 2600 7654 5510 7303 39	Yes
IT	Italy	27	IT60 X054 2811 1010 0000 0123 456	Yes
JO	Jordan	30	JO94 CBJO 0010 0000 0000 0131 0003 02	No
KW	Kuwait	30	KW81 CBKU 0000 0000 0000 1234 5601 01	No		-
KZ	Kazakhstan	20	KZ86 125K ZT50 0410 0100	No		-
LB	Lebanon	28	LB62 0999 0000 0001 0019 0122 9114	No		-
LC	Saint Lucia	32	LC55 HEMM 0001 0001 0012 0012 0002 3015	No		-
LI	Liechtenstein	21	LI21 0881 0000 2324 013A A	Yes		-
LT	Lithuania	20	LT12 1000 0111 0100 1000	Yes		-
LU	Luxembourg	20	LU28 0019 4006 4475 0000	Yes		-
LV	Latvia	21	LV80 BANK 0000 4351 9500 1	Yes		-
LY	Libya	25	LY83 0020 4800 0020 1001 2036 1	No
MC	Monaco	27	MC58 1122 2000 0101 2345 6789 030	Yes
MD	Moldova	24	MD24 AG00 0225 1000 1310 4168	No		-
ME	Montenegro	22	ME25 5050 0001 2345 6789 51	No		-
MK	Macedonia	19	MK07 2501 2000 0058 984	No		-
MN	Mongolia	20	MN12 1234 1234 5678 9123	No		-
MR	Mauritania	27	MR13 0002 0001 0100 0012 3456 753	No
MT	Malta	31	MT84 MALT 0110 0001 2345 MTLC AST0 01S	Yes
MU	Mauritius	30	MU17 BOMM 0101 1010 3030 0200 000M UR	No
NI	Nicaragua	28	NI45 BAPR 0000 0013 0000 0355 8124	No		-
NL	Netherlands (The)	18	NL91 ABNA 0417 1643 00	Yes		-
NO	Norway	15	NO93 8601 1117 947	Yes		-
OM	Oman	23	OM81 0180 0000 0129 9123 456	No		-
PK	Pakistan	24	PK36 SCBL 0000 0011 2345 6702	No		-
PL	Poland	28	PL61 1090 1014 0000 0712 1981 2874	Yes	-
PS	Palestine, State of	29	PS92 PALS 0000 0000 0400 1234 5670 2	No		-
PT	Portugal	25	PT50 0002 0123 1234 5678 9015 4	Yes
QA	Qatar	29	QA58 DOHB 0000 1234 5678 90AB CDEF G	No		-
RO	Romania	24	RO49 AAAA 1B31 0075 9384 0000	Yes		-
RS	Serbia	22	RS35 2600 0560 1001 6113 79	No		-
SA	Saudi Arabia	24	SA03 8000 0000 6080 1016 7519	No		-
SC	Seychelles	31	SC18 SSCB 1101 0000 0000 0000 1497 USD	No
SD	Sudan	18	SD21 2901 0501 2340 01	No		-
SE	Sweden	24	SE45 5000 0000 0583 9825 7466	Yes		-
SI	Slovenia	19	SI56 2633 0001 2039 086	Yes		-
SK	Slovakia	24	SK31 1200 0000 1987 4263 7541	Yes		-
SM	San Marino	27	SM86 U032 2509 8000 0000 0270 100	Yes
SO	Somalia	23	SO21 1000 0010 0100 0100 141	No
ST	Sao Tome and Principe	25	ST23 0001 0001 0051 8453 1014 6	No
SV	El Salvador	28	SV62 CENR 0000 0000 0000 0070 0025	No		-
TL	Timor-Leste	23	TL38 0080 0123 4567 8910 157	No		-
TN	Tunisia	24	TN59 1000 6035 1835 9847 8831	No
TR	Turkey	26	TR33 0006 1005 1978 6457 8413 26	No		-
UA	Ukraine	29	UA21 3223 1300 0002 6007 2335 6600 1	No		-
VA	Vatican City State	22	VA59 0011 2300 0012 3456 78	Yes		-
VG	Virgin Islands	24	VG96 VPVG 0000 0123 4567 8901	No		-
XK	Kosovo	20	XK05 1212 0123 4567 8906	No
YE	Yemen	30	YE15 CBYE 0001 0188 6123 4567 8912 34	No

Finland includes:

• Åland Islands (AX)

France includes:

• French Guiana (GF)
• Guadeloupe (GP)
• Martinique (MQ)
• Réunion (RE)
• French Polynesia (PF)
• French Southern and Antarctic Lands (TF)
• Mayotte (YT)
• New Caledonia (NC)
• St. Barthélemy (BL)
• St. Martin (MF)
• St. Pierre & Miquelon (PM)
• Wallis & Futuna (WF)

United Kingdom includes:

• Isle of Man (IM)
• Jersey (JE)
• Guernsey (GG)

Wikipedia

Extra (unofficial) countries from Wikipedia:

ISO country code	Country	Length	IBAN example	SEPA	Bank ID	Branch ID
AO	Angola	25	-	-	-	-
BF	Burkina Faso	28	-	-	-	-
BJ	Benin	28	-	-	-	-
CF	Central African Republic	27	-	-	-	-
CG	Congo, Republic of the	27	-	-	-	-
CI	Côte d'Ivoire	28	-	-	-	-
CM	Cameroon	27	-	-	-	-
CV	Cabo Verde	25	-	-	-	-
DZ	Algeria	26	-	-	-	-
GA	Gabon	27	-	-	-	-
GQ	Equatorial Guinea	27	-	-	-	-
GW	Guinea-Bissau	25	-	-	-	-
IR	Iran	26	-	-	-	-
KM	Comoros	27	-	-	-	-
MA	Morocco	28	-	-	-	-
MG	Madagascar	27	-	-	-	-
ML	Mali	28	-	-	-	-
MZ	Mozambique	25	-	-	-	-
NE	Niger	28	-	-	-	-
SN	Senegal	28	-	-	-	-
TD	Chad	27	-	-	-	-
TG	Togo	28	-	-	-	-

The countries taken from Wikipedia are not enabled by default when using IbanNet. Check the documentation how to enable the WikipediaRegistryProvider.