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 FlagAD51
United Arab EmiratesUnited Arab Emirates FlagAE963
AfghanistanAfghanistan FlagAF434
Antigua and BarbudaAntigua and Barbuda FlagAG128
AnguillaAnguilla FlagAI42
AlbaniaAlbania FlagAL630
ArmeniaArmenia FlagAM494
AngolaAngola FlagAO323
AntarcticaAntarctica FlagAQ1
ArgentinaArgentina FlagAR12847
American SamoaAmerican Samoa FlagAS25
AustriaAustria FlagAT2841
AustraliaAustralia FlagAU23534
ArubaAruba FlagAW121
Aland IslandsAland Islands FlagAX27
AzerbaijanAzerbaijan FlagAZ842
Bosnia and HerzegovinaBosnia and Herzegovina FlagBA730
BarbadosBarbados FlagBB386
BangladeshBangladesh FlagBD5152
BelgiumBelgium FlagBE2450
Burkina FasoBurkina Faso FlagBF173
BulgariaBulgaria FlagBG7311
BahrainBahrain FlagBH751
BurundiBurundi FlagBI97
BeninBenin FlagBJ179
Saint BarthelemySaint Barthelemy FlagBL5
BermudaBermuda FlagBM244
Brunei DarussalamBrunei Darussalam FlagBN244
Bolivia, Plurinational State ofBolivia, Plurinational State of FlagBO797
Bonaire, Sint Eustatius and SabaBonaire, Sint Eustatius and Saba FlagBQ39
BrazilBrazil FlagBR41907
BahamasBahamas FlagBS111
BhutanBhutan FlagBT38
BotswanaBotswana FlagBW257
BelarusBelarus FlagBY1269
BelizeBelize FlagBZ182
CanadaCanada FlagCA27285
Congo, The Democratic Republic of TheCongo, The Democratic Republic of The FlagCD230
Central African RepublicCentral African Republic FlagCF17
CongoCongo FlagCG122
SwitzerlandSwitzerland FlagCH4319
Cote DivoireCote Divoire FlagCI828
Cook IslandsCook Islands FlagCK30
ChileChile FlagCL5290
CameroonCameroon FlagCM431
ChinaChina FlagCN50582
ColombiaColombia FlagCO8844
Costa RicaCosta Rica FlagCR4516
CubaCuba FlagCU37
Cabo VerdeCabo Verde FlagCV21
CuracaoCuracao FlagCW231
CyprusCyprus FlagCY999
Czech RepublicCzech Republic FlagCZ2269
GermanyGermany FlagDE21291
DjiboutiDjibouti FlagDJ93
DenmarkDenmark FlagDK1964
DominicaDominica FlagDM51
Dominican RepublicDominican Republic FlagDO999
AlgeriaAlgeria FlagDZ607
EcuadorEcuador FlagEC3750
EstoniaEstonia FlagEE666
EgyptEgypt FlagEG5626
EritreaEritrea FlagER6
SpainSpain FlagES18188
EthiopiaEthiopia FlagET192
FinlandFinland FlagFI2435
FijiFiji FlagFJ140
Falkland Islands (Malvinas)Falkland Islands (Malvinas) FlagFK11
Micronesia, Federated States ofMicronesia, Federated States of FlagFM14
Faroe IslandsFaroe Islands FlagFO14
FranceFrance FlagFR10283
GabonGabon FlagGA193
United KingdomUnited Kingdom FlagGB19014
GrenadaGrenada FlagGD65
GeorgiaGeorgia FlagGE495
French GuianaFrench Guiana FlagGF22
GuernseyGuernsey FlagGG99
GhanaGhana FlagGH620
GibraltarGibraltar FlagGI156
GreenlandGreenland FlagGL19
GambiaGambia FlagGM68
GuineaGuinea FlagGN73
GuadeloupeGuadeloupe FlagGP51
Equatorial GuineaEquatorial Guinea FlagGQ37
GreeceGreece FlagGR1377
GuatemalaGuatemala FlagGT747
GuamGuam FlagGU94
Guinea-BissauGuinea-Bissau FlagGW8
GuyanaGuyana FlagGY87
Hong KongHong Kong FlagHK17759
HondurasHonduras FlagHN821
CroatiaCroatia FlagHR624
HaitiHaiti FlagHT217
HungaryHungary FlagHU1898
IndonesiaIndonesia FlagID14525
IrelandIreland FlagIE1506
IsraelIsrael FlagIL5590
Isle of ManIsle of Man FlagIM133
IndiaIndia FlagIN41373
British Indian Ocean TerritoryBritish Indian Ocean Territory FlagIO3
IraqIraq FlagIQ1564
Iran, Islamic Republic ofIran, Islamic Republic of FlagIR6724
IcelandIceland FlagIS306
ItalyItaly FlagIT7933
JerseyJersey FlagJE119
JamaicaJamaica FlagJM454
JordanJordan FlagJO1324
JapanJapan FlagJP14635
KenyaKenya FlagKE1536
KyrgyzstanKyrgyzstan FlagKG351
CambodiaCambodia FlagKH1347
KiribatiKiribati FlagKI19
ComorosComoros FlagKM14
Saint Kitts and NevisSaint Kitts and Nevis FlagKN51
Korea, Democratic Peoples Republic ofKorea, Democratic Peoples Republic of FlagKP4
Korea, Republic ofKorea, Republic of FlagKR33310
KuwaitKuwait FlagKW2161
Cayman IslandsCayman Islands FlagKY100
KazakhstanKazakhstan FlagKZ3861
Lao Peoples Democratic RepublicLao Peoples Democratic Republic FlagLA251
LebanonLebanon FlagLB1617
Saint LuciaSaint Lucia FlagLC80
LiechtensteinLiechtenstein FlagLI74
Sri LankaSri Lanka FlagLK470
LiberiaLiberia FlagLR69
LesothoLesotho FlagLS66
LithuaniaLithuania FlagLT1599
LuxembourgLuxembourg FlagLU652
LatviaLatvia FlagLV1203
LibyaLibya FlagLY302
MoroccoMorocco FlagMA1759
MonacoMonaco FlagMC57
Moldova, Republic ofMoldova, Republic of FlagMD757
MontenegroMontenegro FlagME114
Saint Martin (French Part)Saint Martin (French Part) FlagMF31
MadagascarMadagascar FlagMG208
Marshall IslandsMarshall Islands FlagMH17
North MacedoniaNorth Macedonia FlagMK702
MaliMali FlagML80
MyanmarMyanmar FlagMM480
MongoliaMongolia FlagMN414
MacaoMacao FlagMO147
Northern Mariana IslandsNorthern Mariana Islands FlagMP36
MartiniqueMartinique FlagMQ44
MauritaniaMauritania FlagMR53
MontserratMontserrat FlagMS9
MaltaMalta FlagMT447
MauritiusMauritius FlagMU880
MaldivesMaldives FlagMV219
MalawiMalawi FlagMW234
MexicoMexico FlagMX19029
MalaysiaMalaysia FlagMY3016
MozambiqueMozambique FlagMZ722
NamibiaNamibia FlagNA140
New CaledoniaNew Caledonia FlagNC91
NigerNiger FlagNE74
Norfolk IslandNorfolk Island FlagNF7
NigeriaNigeria FlagNG2257
NicaraguaNicaragua FlagNI526
NetherlandsNetherlands FlagNL10707
NorwayNorway FlagNO1649
NepalNepal FlagNP728
NauruNauru FlagNR13
NiueNiue FlagNU5
New ZealandNew Zealand FlagNZ3898
OmanOman FlagOM757
PanamaPanama FlagPA1393
PeruPeru FlagPE3151
French PolynesiaFrench Polynesia FlagPF236
Papua New GuineaPapua New Guinea FlagPG157
PhilippinesPhilippines FlagPH4909
PakistanPakistan FlagPK5709
PolandPoland FlagPL7799
Saint Pierre and MiquelonSaint Pierre and Miquelon FlagPM18
Puerto RicoPuerto Rico FlagPR1806
Palestine, State ofPalestine, State of FlagPS1051
PortugalPortugal FlagPT800
PalauPalau FlagPW5
ParaguayParaguay FlagPY559
QatarQatar FlagQA428
ReunionReunion FlagRE59
RomaniaRomania FlagRO6897
SerbiaSerbia FlagRS1694
Russian FederationRussian Federation FlagRU36990
RwandaRwanda FlagRW238
Saudi ArabiaSaudi Arabia FlagSA7447
Solomon IslandsSolomon Islands FlagSB43
SeychellesSeychelles FlagSC194
SudanSudan FlagSD556
SwedenSweden FlagSE6543
SingaporeSingapore FlagSG7716
SloveniaSlovenia FlagSI663
SlovakiaSlovakia FlagSK906
Sierra LeoneSierra Leone FlagSL152
San MarinoSan Marino FlagSM103
SenegalSenegal FlagSN229
SomaliaSomalia FlagSO99
SurinameSuriname FlagSR218
South SudanSouth Sudan FlagSS42
Sao Tome and PrincipeSao Tome and Principe FlagST6
El SalvadorEl Salvador FlagSV1091
Sint Maarten (Dutch Part)Sint Maarten (Dutch Part) FlagSX61
Syrian Arab RepublicSyrian Arab Republic FlagSY286
EswatiniEswatini FlagSZ52
Turks and Caicos IslandsTurks and Caicos Islands FlagTC38
ChadChad FlagTD41
TogoTogo FlagTG80
ThailandThailand FlagTH9946
TajikistanTajikistan FlagTJ200
TokelauTokelau FlagTK12
Timor-LesteTimor-Leste FlagTL59
TurkmenistanTurkmenistan FlagTM21
TunisiaTunisia FlagTN725
TongaTonga FlagTO20
TurkeyTurkey FlagTR16614
Trinidad and TobagoTrinidad and Tobago FlagTT376
TuvaluTuvalu FlagTV10
Taiwan, Province of ChinaTaiwan, Province of China FlagTW7568
Tanzania, United Republic ofTanzania, United Republic of FlagTZ653
UkraineUkraine FlagUA11359
UgandaUganda FlagUG640
United States Minor Outlying IslandsUnited States Minor Outlying Islands FlagUM2
United StatesUnited States FlagUS323849
UruguayUruguay FlagUY803
UzbekistanUzbekistan FlagUZ323
Holy SeeHoly See FlagVA5
Saint Vincent and The GrenadinesSaint Vincent and The Grenadines FlagVC47
Venezuela, Bolivarian Republic ofVenezuela, Bolivarian Republic of FlagVE1949
Virgin Islands, BritishVirgin Islands, British FlagVG142
Virgin Islands, U.S.Virgin Islands, U.S. FlagVI121
Viet NamViet Nam FlagVN10595
VanuatuVanuatu FlagVU55
Wallis and FutunaWallis and Futuna FlagWF15
SamoaSamoa FlagWS61
YemenYemen FlagYE119
MayotteMayotte FlagYT4
South AfricaSouth Africa FlagZA6710
ZambiaZambia FlagZM264
ZimbabweZimbabwe FlagZW295