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 FlagAD52
United Arab EmiratesUnited Arab Emirates FlagAE1005
AfghanistanAfghanistan FlagAF511
Antigua and BarbudaAntigua and Barbuda FlagAG121
AnguillaAnguilla FlagAI42
AlbaniaAlbania FlagAL685
ArmeniaArmenia FlagAM492
AngolaAngola FlagAO346
ArgentinaArgentina FlagAR13397
American SamoaAmerican Samoa FlagAS21
AustriaAustria FlagAT3057
AustraliaAustralia FlagAU24636
ArubaAruba FlagAW144
Aland IslandsAland Islands FlagAX29
AzerbaijanAzerbaijan FlagAZ957
Bosnia and HerzegovinaBosnia and Herzegovina FlagBA745
BarbadosBarbados FlagBB397
BangladeshBangladesh FlagBD5536
BelgiumBelgium FlagBE2567
Burkina FasoBurkina Faso FlagBF189
BulgariaBulgaria FlagBG7513
BahrainBahrain FlagBH734
BurundiBurundi FlagBI100
BeninBenin FlagBJ164
Saint BarthelemySaint Barthelemy FlagBL8
BermudaBermuda FlagBM279
Brunei DarussalamBrunei Darussalam FlagBN245
Bolivia (Plurinational State of)Bolivia (Plurinational State of) FlagBO945
Bonaire, Sint Eustatius and SabaBonaire, Sint Eustatius and Saba FlagBQ31
BrazilBrazil FlagBR45585
BahamasBahamas FlagBS116
BhutanBhutan FlagBT40
BotswanaBotswana FlagBW267
BelarusBelarus FlagBY1417
BelizeBelize FlagBZ200
CanadaCanada FlagCA27790
Congo (Democratic Republic of the)Congo (Democratic Republic of the) FlagCD274
Central African RepublicCentral African Republic FlagCF17
CongoCongo FlagCG128
SwitzerlandSwitzerland FlagCH4471
Cote D'ivoireCote D'ivoire FlagCI1135
Cook IslandsCook Islands FlagCK30
ChileChile FlagCL5506
CameroonCameroon FlagCM459
ChinaChina FlagCN55240
ColombiaColombia FlagCO9189
Costa RicaCosta Rica FlagCR4563
CubaCuba FlagCU41
Cabo VerdeCabo Verde FlagCV18
CuracaoCuracao FlagCW223
CyprusCyprus FlagCY1061
CzechiaCzechia FlagCZ2444
GermanyGermany FlagDE20092
DjiboutiDjibouti FlagDJ98
DenmarkDenmark FlagDK2151
DominicaDominica FlagDM53
Dominican RepublicDominican Republic FlagDO1106
AlgeriaAlgeria FlagDZ561
EcuadorEcuador FlagEC3783
EstoniaEstonia FlagEE761
EgyptEgypt FlagEG6377
EritreaEritrea FlagER9
SpainSpain FlagES19399
EthiopiaEthiopia FlagET339
FinlandFinland FlagFI2622
FijiFiji FlagFJ129
Falkland Islands (Malvinas)Falkland Islands (Malvinas) FlagFK8
Micronesia (Federated States of)Micronesia (Federated States of) FlagFM14
Faroe IslandsFaroe Islands FlagFO14
FranceFrance FlagFR10735
GabonGabon FlagGA189
United Kingdom of Great Britain and Northern IrelandUnited Kingdom of Great Britain and Northern Ireland FlagGB20608
GrenadaGrenada FlagGD67
GeorgiaGeorgia FlagGE590
French GuianaFrench Guiana FlagGF32
GuernseyGuernsey FlagGG81
GhanaGhana FlagGH682
GibraltarGibraltar FlagGI151
GreenlandGreenland FlagGL23
GambiaGambia FlagGM58
GuineaGuinea FlagGN71
GuadeloupeGuadeloupe FlagGP150
Equatorial GuineaEquatorial Guinea FlagGQ41
GreeceGreece FlagGR1567
South Georgia and The South Sandwich IslandsSouth Georgia and The South Sandwich Islands FlagGS1
GuatemalaGuatemala FlagGT838
GuamGuam FlagGU93
Guinea-BissauGuinea-Bissau FlagGW8
GuyanaGuyana FlagGY106
Hong KongHong Kong FlagHK20123
HondurasHonduras FlagHN877
CroatiaCroatia FlagHR679
HaitiHaiti FlagHT209
HungaryHungary FlagHU1953
IndonesiaIndonesia FlagID15006
IrelandIreland FlagIE1837
IsraelIsrael FlagIL6667
Isle of ManIsle of Man FlagIM152
IndiaIndia FlagIN41712
British Indian Ocean TerritoryBritish Indian Ocean Territory FlagIO3
IraqIraq FlagIQ1821
Iran (Islamic Republic of)Iran (Islamic Republic of) FlagIR7602
IcelandIceland FlagIS288
ItalyItaly FlagIT8533
JerseyJersey FlagJE126
JamaicaJamaica FlagJM461
JordanJordan FlagJO1265
JapanJapan FlagJP15001
KenyaKenya FlagKE1661
KyrgyzstanKyrgyzstan FlagKG369
CambodiaCambodia FlagKH1458
KiribatiKiribati FlagKI19
ComorosComoros FlagKM15
Saint Kitts and NevisSaint Kitts and Nevis FlagKN52
Korea (Democratic People's Republic of)Korea (Democratic People's Republic of) FlagKP4
Korea (Republic of)Korea (Republic of) FlagKR33956
KuwaitKuwait FlagKW2184
Cayman IslandsCayman Islands FlagKY81
KazakhstanKazakhstan FlagKZ4019
Lao People's Democratic RepublicLao People's Democratic Republic FlagLA263
LebanonLebanon FlagLB1531
Saint LuciaSaint Lucia FlagLC84
LiechtensteinLiechtenstein FlagLI82
Sri LankaSri Lanka FlagLK472
LiberiaLiberia FlagLR59
LesothoLesotho FlagLS70
LithuaniaLithuania FlagLT1813
LuxembourgLuxembourg FlagLU732
LatviaLatvia FlagLV1224
LibyaLibya FlagLY362
MoroccoMorocco FlagMA1780
MonacoMonaco FlagMC18
Moldova (Republic of)Moldova (Republic of) FlagMD800
MontenegroMontenegro FlagME102
Saint Martin (French Part)Saint Martin (French Part) FlagMF28
MadagascarMadagascar FlagMG192
Marshall IslandsMarshall Islands FlagMH18
North MacedoniaNorth Macedonia FlagMK772
MaliMali FlagML103
MyanmarMyanmar FlagMM580
MongoliaMongolia FlagMN439
MacaoMacao FlagMO174
Northern Mariana IslandsNorthern Mariana Islands FlagMP36
MartiniqueMartinique FlagMQ53
MauritaniaMauritania FlagMR95
MontserratMontserrat FlagMS10
MaltaMalta FlagMT484
MauritiusMauritius FlagMU1005
MaldivesMaldives FlagMV253
MalawiMalawi FlagMW247
MexicoMexico FlagMX22130
MalaysiaMalaysia FlagMY3146
MozambiqueMozambique FlagMZ878
NamibiaNamibia FlagNA136
New CaledoniaNew Caledonia FlagNC91
NigerNiger FlagNE84
Norfolk IslandNorfolk Island FlagNF7
NigeriaNigeria FlagNG2440
NicaraguaNicaragua FlagNI580
NetherlandsNetherlands FlagNL11995
NorwayNorway FlagNO2023
NepalNepal FlagNP796
NauruNauru FlagNR12
NiueNiue FlagNU4
New ZealandNew Zealand FlagNZ3956
OmanOman FlagOM955
PanamaPanama FlagPA1541
PeruPeru FlagPE3812
French PolynesiaFrench Polynesia FlagPF241
Papua New GuineaPapua New Guinea FlagPG152
PhilippinesPhilippines FlagPH5230
PakistanPakistan FlagPK5967
PolandPoland FlagPL8300
Saint Pierre and MiquelonSaint Pierre and Miquelon FlagPM20
Puerto RicoPuerto Rico FlagPR1413
Palestine, State ofPalestine, State of FlagPS1081
PortugalPortugal FlagPT843
PalauPalau FlagPW6
ParaguayParaguay FlagPY651
QatarQatar FlagQA451
ReunionReunion FlagRE89
RomaniaRomania FlagRO6764
SerbiaSerbia FlagRS1624
Russian FederationRussian Federation FlagRU39004
RwandaRwanda FlagRW273
Saudi ArabiaSaudi Arabia FlagSA7586
Solomon IslandsSolomon Islands FlagSB47
SeychellesSeychelles FlagSC223
SudanSudan FlagSD428
SwedenSweden FlagSE7544
SingaporeSingapore FlagSG7417
SloveniaSlovenia FlagSI644
SlovakiaSlovakia FlagSK1000
Sierra LeoneSierra Leone FlagSL170
San MarinoSan Marino FlagSM105
SenegalSenegal FlagSN257
SomaliaSomalia FlagSO115
SurinameSuriname FlagSR260
South SudanSouth Sudan FlagSS66
Sao Tome and PrincipeSao Tome and Principe FlagST32
El SalvadorEl Salvador FlagSV1130
Sint Maarten (Dutch Part)Sint Maarten (Dutch Part) FlagSX64
Syrian Arab RepublicSyrian Arab Republic FlagSY305
EswatiniEswatini FlagSZ70
Turks and Caicos IslandsTurks and Caicos Islands FlagTC39
ChadChad FlagTD65
TogoTogo FlagTG85
ThailandThailand FlagTH10784
TajikistanTajikistan FlagTJ214
TokelauTokelau FlagTK12
Timor-LesteTimor-Leste FlagTL59
TurkmenistanTurkmenistan FlagTM26
TunisiaTunisia FlagTN893
TongaTonga FlagTO24
TurkeyTurkey FlagTR14889
Trinidad and TobagoTrinidad and Tobago FlagTT423
TuvaluTuvalu FlagTV13
Taiwan (Province of China)Taiwan (Province of China) FlagTW7962
Tanzania, United Republic ofTanzania, United Republic of FlagTZ701
UkraineUkraine FlagUA11493
UgandaUganda FlagUG698
United States of AmericaUnited States of America FlagUS339572
UruguayUruguay FlagUY804
UzbekistanUzbekistan FlagUZ327
Holy SeeHoly See FlagVA5
Saint Vincent and The GrenadinesSaint Vincent and The Grenadines FlagVC48
Venezuela (Bolivarian Republic of)Venezuela (Bolivarian Republic of) FlagVE2030
Virgin Islands (British)Virgin Islands (British) FlagVG151
Virgin Islands (U.S.)Virgin Islands (U.S.) FlagVI95
Viet NamViet Nam FlagVN10732
VanuatuVanuatu FlagVU53
Wallis and FutunaWallis and Futuna FlagWF15
SamoaSamoa FlagWS66
YemenYemen FlagYE136
MayotteMayotte FlagYT14
South AfricaSouth Africa FlagZA6586
ZambiaZambia FlagZM316
ZimbabweZimbabwe FlagZW296