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.
| Country Code | Flag | Country | Allocated CIDR/IP Ranges |
|---|---|---|---|
| EC |  |
Ecuador | 3897 |
| EE |  |
Estonia | 811 |
| EG |  |
Egypt | 6414 |
| ER |  |
Eritrea | 10 |
| ES |  |
Spain | 19969 |
| ET |  |
Ethiopia | 340 |
| FI |  |
Finland | 2701 |
| FJ |  |
Fiji | 133 |
| FK |  |
Falkland Islands (Malvinas) | 8 |
| FM |  |
Micronesia (Federated States of) | 15 |
| FO |  |
Faroe Islands | 16 |
| FR |  |
France | 11354 |
| GA |  |
Gabon | 194 |
| GB |  |
United Kingdom of Great Britain and Northern Ireland | 21754 |
| GD |  |
Grenada | 72 |
| GE |  |
Georgia | 666 |
| GF |  |
French Guiana | 35 |
| GG |  |
Guernsey | 84 |
| GH |  |
Ghana | 735 |
| GI |  |
Gibraltar | 157 |
| GL |  |
Greenland | 25 |
| GM |  |
Gambia | 61 |
| GN |  |
Guinea | 79 |
| GP |  |
Guadeloupe | 157 |
| GQ |  |
Equatorial Guinea | 46 |
| GR |  |
Greece | 1644 |
| GS |  |
South Georgia and The South Sandwich Islands | 1 |
| GT |  |
Guatemala | 868 |
| GU |  |
Guam | 99 |
| GW |  |
Guinea-Bissau | 11 |
| GY |  |
Guyana | 111 |
| HK |  |
Hong Kong | 20600 |
| HN |  |
Honduras | 912 |
| HR |  |
Croatia | 731 |
| HT |  |
Haiti | 213 |
| HU |  |
Hungary | 2009 |
| ID |  |
Indonesia | 16141 |
| IE |  |
Ireland | 1947 |
| IL |  |
Israel | 6816 |
| IM |  |
Isle of Man | 166 |
| IN |  |
India | 43284 |
| IO |  |
British Indian Ocean Territory | 3 |
| IQ |  |
Iraq | 1952 |
| IR |  |
Iran (Islamic Republic of) | 7866 |
| IS |  |
Iceland | 320 |
| IT |  |
Italy | 9027 |
| Country Code | Flag | Country | Allocated CIDR/IP Ranges |
|---|---|---|---|
| JE |  |
Jersey | 131 |
| JM |  |
Jamaica | 468 |
| JO |  |
Jordan | 1301 |
| JP |  |
Japan | 15399 |
| KE |  |
Kenya | 1736 |
| KG |  |
Kyrgyzstan | 394 |
| KH |  |
Cambodia | 1536 |
| KI |  |
Kiribati | 20 |
| KM |  |
Comoros | 17 |
| KN |  |
Saint Kitts and Nevis | 55 |
| KP |  |
Korea (Democratic People's Republic of) | 5 |
| KR |  |
Korea (Republic of) | 34337 |
| KW |  |
Kuwait | 2227 |
| KY |  |
Cayman Islands | 87 |
| KZ |  |
Kazakhstan | 4115 |
| LA |  |
Lao People's Democratic Republic | 282 |
| LB |  |
Lebanon | 1634 |
| LC |  |
Saint Lucia | 87 |
| LI |  |
Liechtenstein | 91 |
| LK |  |
Sri Lanka | 480 |
| LR |  |
Liberia | 64 |
| LS |  |
Lesotho | 73 |
| LT |  |
Lithuania | 1866 |
| LU |  |
Luxembourg | 794 |
| LV |  |
Latvia | 1302 |
| LY |  |
Libya | 375 |
| MA |  |
Morocco | 1794 |
| MC |  |
Monaco | 21 |
| MD |  |
Moldova (Republic of) | 846 |
| ME |  |
Montenegro | 109 |
| MF |  |
Saint Martin (French Part) | 33 |
| MG |  |
Madagascar | 197 |
| MH |  |
Marshall Islands | 18 |
| MK |  |
North Macedonia | 791 |
| ML |  |
Mali | 110 |
| MM |  |
Myanmar | 638 |
| MN |  |
Mongolia | 456 |
| MO |  |
Macao | 186 |
| MP |  |
Northern Mariana Islands | 37 |
| MQ |  |
Martinique | 60 |
| MR |  |
Mauritania | 100 |
| MS |  |
Montserrat | 13 |
| MT |  |
Malta | 508 |
| MU |  |
Mauritius | 1081 |
| MV |  |
Maldives | 258 |
| MW |  |
Malawi | 261 |
| MX |  |
Mexico | 22354 |
| MY |  |
Malaysia | 3312 |
| MZ |  |
Mozambique | 891 |
| Country Code | Flag | Country | Allocated CIDR/IP Ranges |
|---|---|---|---|
| NA |  |
Namibia | 141 |
| NC |  |
New Caledonia | 94 |
| NE |  |
Niger | 91 |
| NF |  |
Norfolk Island | 7 |
| NG |  |
Nigeria | 2560 |
| NI |  |
Nicaragua | 589 |
| NL |  |
Netherlands | 12648 |
| NO |  |
Norway | 2117 |
| NP |  |
Nepal | 888 |
| NR |  |
Nauru | 12 |
| NU |  |
Niue | 5 |
| NZ |  |
New Zealand | 4130 |
| OM |  |
Oman | 982 |
| PA |  |
Panama | 1591 |
| PE |  |
Peru | 3899 |
| PF |  |
French Polynesia | 248 |
| PG |  |
Papua New Guinea | 168 |
| PH |  |
Philippines | 5421 |
| PK |  |
Pakistan | 6096 |
| PL |  |
Poland | 8735 |
| PM |  |
Saint Pierre and Miquelon | 22 |
| PR |  |
Puerto Rico | 1462 |
| PS |  |
Palestine, State of | 1123 |
| PT |  |
Portugal | 893 |
| PW |  |
Palau | 8 |
| PY |  |
Paraguay | 704 |
| QA |  |
Qatar | 460 |
| RE |  |
Reunion | 93 |
| RO |  |
Romania | 6840 |
| RS |  |
Serbia | 1717 |
| RU |  |
Russian Federation | 40392 |
| RW |  |
Rwanda | 284 |
| Country Code | Flag | Country | Allocated CIDR/IP Ranges |
|---|---|---|---|
| SA |  |
Saudi Arabia | 7708 |
| SB |  |
Solomon Islands | 51 |
| SC |  |
Seychelles | 249 |
| SD |  |
Sudan | 435 |
| SE |  |
Sweden | 7780 |
| SG |  |
Singapore | 7824 |
| SI |  |
Slovenia | 675 |
| SK |  |
Slovakia | 1063 |
| SL |  |
Sierra Leone | 179 |
| SM |  |
San Marino | 109 |
| SN |  |
Senegal | 265 |
| SO |  |
Somalia | 133 |
| SR |  |
Suriname | 262 |
| SS |  |
South Sudan | 78 |
| ST |  |
Sao Tome and Principe | 34 |
| SV |  |
El Salvador | 1155 |
| SX |  |
Sint Maarten (Dutch Part) | 66 |
| SY |  |
Syrian Arab Republic | 307 |
| SZ |  |
Eswatini | 77 |
| TC |  |
Turks and Caicos Islands | 41 |
| TD |  |
Chad | 76 |
| TG |  |
Togo | 88 |
| TH |  |
Thailand | 10979 |
| TJ |  |
Tajikistan | 227 |
| TK |  |
Tokelau | 15 |
| TL |  |
Timor-Leste | 65 |
| TM |  |
Turkmenistan | 28 |
| TN |  |
Tunisia | 898 |
| TO |  |
Tonga | 26 |
| TR |  |
Turkey | 15217 |
| TT |  |
Trinidad and Tobago | 433 |
| TV |  |
Tuvalu | 14 |
| TW |  |
Taiwan (Province of China) | 8135 |
| TZ |  |
Tanzania, United Republic of | 737 |
| UA |  |
Ukraine | 11995 |
| UG |  |
Uganda | 726 |
| US |  |
United States of America | 345311 |
| UY |  |
Uruguay | 817 |
| UZ |  |
Uzbekistan | 369 |
| VA |  |
Holy See | 5 |
| VC |  |
Saint Vincent and The Grenadines | 51 |
| VE |  |
Venezuela (Bolivarian Republic of) | 2097 |
| VG |  |
Virgin Islands (British) | 164 |
| VI |  |
Virgin Islands (U.S.) | 101 |
| VN |  |
Viet Nam | 10957 |
| VU |  |
Vanuatu | 56 |
| Country Code | Flag | Country | Allocated CIDR/IP Ranges |
|---|---|---|---|
| WF |  |
Wallis and Futuna | 16 |
| WS |  |
Samoa | 72 |
| YE |  |
Yemen | 137 |
| YT |  |
Mayotte | 15 |
| ZA |  |
South Africa | 6912 |
| ZM |  |
Zambia | 326 |
| ZW |  |
Zimbabwe | 314 |