What Is An ASN?

An autonomous system number (ASN) is a unique number assigned to an autonomous system (AS) by the Internet Assigned Numbers Authority (IANA).

An AS consists of blocks of IP addresses which have a distinctly defined policy for accessing external networks and are administered by a single organization but may be made up of several operators.

Below you will find a list of public ASN's listed by country.

CountryFlagCountry CodeASN's
AndorraAndorra Flag AD49
United Arab EmiratesUnited Arab Emirates Flag AE921
AfghanistanAfghanistan Flag AF425
Antigua and BarbudaAntigua and Barbuda Flag AG137
AnguillaAnguilla Flag AI41
AlbaniaAlbania Flag AL617
ArmeniaArmenia Flag AM477
AngolaAngola Flag AO319
AntarcticaAntarctica Flag AQ1
ArgentinaArgentina Flag AR12623
American SamoaAmerican Samoa Flag AS25
AustriaAustria Flag AT2713
AustraliaAustralia Flag AU23161
ArubaAruba Flag AW121
Aland IslandsAland Islands Flag AX22
AzerbaijanAzerbaijan Flag AZ841
Bosnia and HerzegovinaBosnia and Herzegovina Flag BA715
BarbadosBarbados Flag BB354
BangladeshBangladesh Flag BD5037
BelgiumBelgium Flag BE2135
Burkina FasoBurkina Faso Flag BF164
BulgariaBulgaria Flag BG7189
BahrainBahrain Flag BH738
BurundiBurundi Flag BI96
BeninBenin Flag BJ175
Saint BarthelemySaint Barthelemy Flag BL3
BermudaBermuda Flag BM252
Brunei DarussalamBrunei Darussalam Flag BN211
Bolivia, Plurinational State ofBolivia, Plurinational State of Flag BO778
Bonaire, Sint Eustatius and SabaBonaire, Sint Eustatius and Saba Flag BQ39
BrazilBrazil Flag BR38621
BahamasBahamas Flag BS107
BhutanBhutan Flag BT37
BotswanaBotswana Flag BW262
BelarusBelarus Flag BY1292
BelizeBelize Flag BZ215
CanadaCanada Flag CA27471
Congo, The Democratic Republic of TheCongo, The Democratic Republic of The Flag CD229
Central African RepublicCentral African Republic Flag CF18
CongoCongo Flag CG116
SwitzerlandSwitzerland Flag CH4191
Cote D'ivoireCote D'ivoire Flag CI799
Cook IslandsCook Islands Flag CK30
ChileChile Flag CL5282
CameroonCameroon Flag CM429
ChinaChina Flag CN49828
ColombiaColombia Flag CO8715
Costa RicaCosta Rica Flag CR4508
CubaCuba Flag CU36
Cabo VerdeCabo Verde Flag CV23
CuracaoCuracao Flag CW238
CyprusCyprus Flag CY955
Czech RepublicCzech Republic Flag CZ2068
GermanyGermany Flag DE17968
DjiboutiDjibouti Flag DJ95
DenmarkDenmark Flag DK1924
DominicaDominica Flag DM52
Dominican RepublicDominican Republic Flag DO915
AlgeriaAlgeria Flag DZ644
EcuadorEcuador Flag EC3688
EstoniaEstonia Flag EE622
EgyptEgypt Flag EG5318
EritreaEritrea Flag ER10
SpainSpain Flag ES17196
EthiopiaEthiopia Flag ET175
FinlandFinland Flag FI2389
FijiFiji Flag FJ140
Falkland Islands (Malvinas)Falkland Islands (Malvinas) Flag FK11
Micronesia, Federated States ofMicronesia, Federated States of Flag FM14
Faroe IslandsFaroe Islands Flag FO14
FranceFrance Flag FR9653
GabonGabon Flag GA203
United KingdomUnited Kingdom Flag GB18852
GrenadaGrenada Flag GD65
GeorgiaGeorgia Flag GE734
French GuianaFrench Guiana Flag GF25
GuernseyGuernsey Flag GG97
GhanaGhana Flag GH626
GibraltarGibraltar Flag GI161
GreenlandGreenland Flag GL17
GambiaGambia Flag GM66
GuineaGuinea Flag GN71
GuadeloupeGuadeloupe Flag GP54
Equatorial GuineaEquatorial Guinea Flag GQ37
GreeceGreece Flag GR1289
GuatemalaGuatemala Flag GT740
GuamGuam Flag GU91
Guinea-BissauGuinea-Bissau Flag GW8
GuyanaGuyana Flag GY88
Hong KongHong Kong Flag HK16174
HondurasHonduras Flag HN814
CroatiaCroatia Flag HR611
HaitiHaiti Flag HT209
HungaryHungary Flag HU1873
IndonesiaIndonesia Flag ID14027
IrelandIreland Flag IE1430
IsraelIsrael Flag IL5768
Isle of ManIsle of Man Flag IM142
IndiaIndia Flag IN40783
British Indian Ocean TerritoryBritish Indian Ocean Territory Flag IO3
IraqIraq Flag IQ1537
Iran, Islamic Republic ofIran, Islamic Republic of Flag IR6652
IcelandIceland Flag IS261
ItalyItaly Flag IT7713
JerseyJersey Flag JE112
JamaicaJamaica Flag JM438
JordanJordan Flag JO1243
JapanJapan Flag JP15321
KenyaKenya Flag KE1454
KyrgyzstanKyrgyzstan Flag KG343
CambodiaCambodia Flag KH1318
KiribatiKiribati Flag KI19
ComorosComoros Flag KM13
Saint Kitts and NevisSaint Kitts and Nevis Flag KN48
Korea, Democratic People's Republic ofKorea, Democratic People's Republic of Flag KP4
Korea, Republic ofKorea, Republic of Flag KR32843
KuwaitKuwait Flag KW2106
Cayman IslandsCayman Islands Flag KY98
KazakhstanKazakhstan Flag KZ3828
Lao People's Democratic RepublicLao People's Democratic Republic Flag LA248
LebanonLebanon Flag LB1552
Saint LuciaSaint Lucia Flag LC77
LiechtensteinLiechtenstein Flag LI67
Sri LankaSri Lanka Flag LK465
LiberiaLiberia Flag LR68
LesothoLesotho Flag LS67
LithuaniaLithuania Flag LT1562
LuxembourgLuxembourg Flag LU636
LatviaLatvia Flag LV1188
LibyaLibya Flag LY291
MoroccoMorocco Flag MA1372
MonacoMonaco Flag MC47
Moldova, Republic ofMoldova, Republic of Flag MD782
MontenegroMontenegro Flag ME120
Saint Martin (French Part)Saint Martin (French Part) Flag MF26
MadagascarMadagascar Flag MG202
Marshall IslandsMarshall Islands Flag MH17
North MacedoniaNorth Macedonia Flag MK693
MaliMali Flag ML77
MyanmarMyanmar Flag MM452
MongoliaMongolia Flag MN402
MacaoMacao Flag MO177
Northern Mariana IslandsNorthern Mariana Islands Flag MP36
MartiniqueMartinique Flag MQ62
MauritaniaMauritania Flag MR49
MontserratMontserrat Flag MS7
MaltaMalta Flag MT429
MauritiusMauritius Flag MU797
MaldivesMaldives Flag MV207
MalawiMalawi Flag MW199
MexicoMexico Flag MX18629
MalaysiaMalaysia Flag MY2962
MozambiqueMozambique Flag MZ741
NamibiaNamibia Flag NA146
New CaledoniaNew Caledonia Flag NC91
NigerNiger Flag NE81
Norfolk IslandNorfolk Island Flag NF7
NigeriaNigeria Flag NG2187
NicaraguaNicaragua Flag NI523
NetherlandsNetherlands Flag NL10855
NorwayNorway Flag NO1640
NepalNepal Flag NP770
NauruNauru Flag NR8
NiueNiue Flag NU5
New ZealandNew Zealand Flag NZ3872
OmanOman Flag OM626
PanamaPanama Flag PA1462
PeruPeru Flag PE3114
French PolynesiaFrench Polynesia Flag PF241
Papua New GuineaPapua New Guinea Flag PG154
PhilippinesPhilippines Flag PH4856
PakistanPakistan Flag PK5407
PolandPoland Flag PL7719
Saint Pierre and MiquelonSaint Pierre and Miquelon Flag PM18
Puerto RicoPuerto Rico Flag PR1802
Palestine, State ofPalestine, State of Flag PS955
PortugalPortugal Flag PT762
PalauPalau Flag PW5
ParaguayParaguay Flag PY537
QatarQatar Flag QA425
ReunionReunion Flag RE74
RomaniaRomania Flag RO6878
SerbiaSerbia Flag RS1670
Russian FederationRussian Federation Flag RU36130
RwandaRwanda Flag RW208
Saudi ArabiaSaudi Arabia Flag SA6996
Solomon IslandsSolomon Islands Flag SB44
SeychellesSeychelles Flag SC190
SudanSudan Flag SD304
SwedenSweden Flag SE6443
SingaporeSingapore Flag SG7700
SloveniaSlovenia Flag SI661
SlovakiaSlovakia Flag SK893
Sierra LeoneSierra Leone Flag SL89
San MarinoSan Marino Flag SM102
SenegalSenegal Flag SN211
SomaliaSomalia Flag SO90
SurinameSuriname Flag SR199
South SudanSouth Sudan Flag SS35
Sao Tome and PrincipeSao Tome and Principe Flag ST6
El SalvadorEl Salvador Flag SV1071
Sint Maarten (Dutch Part)Sint Maarten (Dutch Part) Flag SX62
Syrian Arab RepublicSyrian Arab Republic Flag SY281
EswatiniEswatini Flag SZ48
Turks and Caicos IslandsTurks and Caicos Islands Flag TC35
ChadChad Flag TD40
TogoTogo Flag TG83
ThailandThailand Flag TH9684
TajikistanTajikistan Flag TJ195
TokelauTokelau Flag TK12
Timor-LesteTimor-Leste Flag TL59
TurkmenistanTurkmenistan Flag TM18
TunisiaTunisia Flag TN955
TongaTonga Flag TO20
TurkeyTurkey Flag TR15495
Trinidad and TobagoTrinidad and Tobago Flag TT455
TuvaluTuvalu Flag TV10
Taiwan, Province of ChinaTaiwan, Province of China Flag TW7717
Tanzania, United Republic ofTanzania, United Republic of Flag TZ603
UkraineUkraine Flag UA11268
UgandaUganda Flag UG541
United States Minor Outlying IslandsUnited States Minor Outlying Islands Flag UM2
United StatesUnited States Flag US319759
UruguayUruguay Flag UY812
UzbekistanUzbekistan Flag UZ312
Holy SeeHoly See Flag VA5
Saint Vincent and The GrenadinesSaint Vincent and The Grenadines Flag VC45
Venezuela, Bolivarian Republic ofVenezuela, Bolivarian Republic of Flag VE1822
Virgin Islands, BritishVirgin Islands, British Flag VG137
Virgin Islands, U.S.Virgin Islands, U.S. Flag VI111
Viet NamViet Nam Flag VN10826
VanuatuVanuatu Flag VU59
Wallis and FutunaWallis and Futuna Flag WF15
SamoaSamoa Flag WS60
YemenYemen Flag YE109
MayotteMayotte Flag YT3
South AfricaSouth Africa Flag ZA6961
ZambiaZambia Flag ZM257
ZimbabweZimbabwe Flag ZW282