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.

Country	Flag	Country Code	ASN's
Afghanistan		AF	37
Aland Islands		AX	0
Albania		AL	13
Algeria		DZ	11
American Samoa		AS	4
Andorra		AD	0
Angola		AO	41
Anguilla		AI	5
Antarctica		AQ	0
Antigua and Barbuda		AG	8
Argentina		AR	522
Armenia		AM	13
Aruba		AW	5
Australia		AU	1497
Austria		AT	146
Azerbaijan		AZ	10
Bahamas		BS	7
Bahrain		BH	3
Bangladesh		BD	360
Barbados		BB	8
Belarus		BY	9
Belgium		BE	99
Belize		BZ	16
Benin		BJ	9
Bermuda		BM	15
Bhutan		BT	7
Bolivia, Plurinational State of		BO	26
Bonaire, Sint Eustatius and Saba		BQ	6
Bosnia and Herzegovina		BA	15
Botswana		BW	17
Bouvet Island		BV	0
Brazil		BR	4179
British Indian Ocean Territory		IO	1
Brunei Darussalam		BN	10
Bulgaria		BG	133
Burkina Faso		BF	7
Burundi		BI	9
Cabo Verde		CV	3
Cambodia		KH	58
Cameroon		CM	14
Canada		CA	1343
Cayman Islands		KY	16
Central African Republic		CF	6
Chad		TD	6
Chile		CL	193
China		CN	446
Christmas Island		CX	0
Cocos (Keeling) Islands		CC	0
Colombia		CO	133
Comoros		KM	1
Congo		CG	11
Congo, The Democratic Republic of The		CD	21
Cook Islands		CK	3
Costa Rica		CR	73
Cote D'ivoire		CI	14
Croatia		HR	35
Cuba		CU	4
Curacao		CW	23
Cyprus		CY	38
Czech Republic		CZ	164
Denmark		DK	80
Djibouti		DJ	4
Dominica		DM	5
Dominican Republic		DO	26
Ecuador		EC	64
Egypt		EG	61
El Salvador		SV	31
Equatorial Guinea		GQ	6
Eritrea		ER	1
Estonia		EE	25
Ethiopia		ET	2
Falkland Islands (Malvinas)		FK	1
Faroe Islands		FO	0
Fiji		FJ	6
Finland		FI	64
France		FR	386
French Guiana		GF	3
French Polynesia		PF	4
Gabon		GA	12
Gambia		GM	7
Georgia		GE	16
Germany		DE	733
Ghana		GH	49
Gibraltar		GI	5
Greece		GR	55
Greenland		GL	0
Grenada		GD	3
Guadeloupe		GP	5
Guam		GU	12
Guatemala		GT	43
Guernsey		GG	3
Guinea		GN	7
Guinea-Bissau		GW	3
Guyana		GY	6
Haiti		HT	8
Holy See		VA	1
Honduras		HN	49
Hong Kong		HK	626
Hungary		HU	57
Iceland		IS	18
India		IN	1353
Indonesia		ID	804
Iran, Islamic Republic of		IR	52
Iraq		IQ	22
Ireland		IE	82
Isle of Man		IM	7
Israel		IL	71
Italy		IT	264
Jamaica		JM	13
Japan		JP	704
Jersey		JE	3
Jordan		JO	7
Kazakhstan		KZ	25
Kenya		KE	81
Kiribati		KI	3
Korea, Democratic People's Republic of		KP	1
Korea, Republic of		KR	772
Kuwait		KW	18
Kyrgyzstan		KG	5
Lao People's Democratic Republic		LA	13
Latvia		LV	69
Lebanon		LB	24
Lesotho		LS	7
Liberia		LR	8
Libya		LY	5
Liechtenstein		LI	7
Lithuania		LT	39
Luxembourg		LU	50
Macao		MO	12
Macedonia, The Former Yugoslav Republic of		MK	12
Madagascar		MG	6
Malawi		MW	8
Malaysia		MY	183
Maldives		MV	5
Mali		ML	4
Malta		MT	9
Marshall Islands		MH	1
Martinique		MQ	3
Mauritania		MR	3
Mauritius		MU	20
Mayotte		YT	1
Mexico		MX	263
Micronesia, Federated States of		FM	4
Moldova, Republic of		MD	41
Monaco		MC	0
Mongolia		MN	36
Montenegro		ME	5
Montserrat		MS	1
Morocco		MA	14
Mozambique		MZ	21
Myanmar		MM	20
Namibia		NA	11
Nauru		NR	3
Nepal		NP	44
Netherlands		NL	379
New Caledonia		NC	11
New Zealand		NZ	377
Nicaragua		NI	30
Niger		NE	11
Nigeria		NG	128
Niue		NU	3
Norfolk Island		NF	1
Northern Mariana Islands		MP	1
Norway		NO	71
Oman		OM	5
Pakistan		PK	105
Palau		PW	4
Palestine, State of		PS	10
Panama		PA	89
Papua New Guinea		PG	16
Paraguay		PY	39
Peru		PE	41
Philippines		PH	279
Pitcairn		PN	0
Poland		PL	638
Portugal		PT	38
Puerto Rico		PR	82
Qatar		QA	8
Reunion		RE	4
Romania		RO	434
Russian Federation		RU	961
Rwanda		RW	14
Saint Barthelemy		BL	4
Saint Helena, Ascension and Tristan Da Cunha		SH	0
Saint Kitts and Nevis		KN	3
Saint Lucia		LC	3
Saint Martin (French Part)		MF	6
Saint Pierre and Miquelon		PM	1
Saint Vincent and The Grenadines		VC	4
Samoa		WS	7
San Marino		SM	6
Sao Tome and Principe		ST	2
Saudi Arabia		SA	35
Senegal		SN	6
Serbia		RS	31
Seychelles		SC	14
Sierra Leone		SL	10
Singapore		SG	440
Sint Maarten (Dutch Part)		SX	3
Slovakia		SK	38
Slovenia		SI	87
Solomon Islands		SB	5
Somalia		SO	14
South Africa		ZA	303
South Georgia and The South Sandwich Islands		GS	0
South Sudan		SS	8
Spain		ES	248
Sri Lanka		LK	15
Sudan		SD	8
Suriname		SR	5
Svalbard and Jan Mayen		SJ	0
Swaziland		SZ	7
Sweden		SE	222
Switzerland		CH	234
Syrian Arab Republic		SY	3
Taiwan, Province of China		TW	172
Tajikistan		TJ	4
Tanzania, United Republic of		TZ	68
Thailand		TH	325
Timor-Leste		TL	7
Togo		TG	5
Tokelau		TK	2
Tonga		TO	4
Trinidad and Tobago		TT	18
Tunisia		TN	14
Turkey		TR	99
Turkmenistan		TM	0
Turks and Caicos Islands		TC	4
Tuvalu		TV	2
Uganda		UG	34
Ukraine		UA	420
United Arab Emirates		AE	32
United Kingdom		GB	816
United States		US	17219
United States Minor Outlying Islands		UM	0
Uruguay		UY	28
Uzbekistan		UZ	13
Vanuatu		VU	8
Venezuela, Bolivarian Republic of		VE	57
Viet Nam		VN	215
Virgin Islands, British		VG	14
Virgin Islands, U.S.		VI	7
Wallis and Futuna		WF	2
Yemen		YE	4
Zambia		ZM	22
Zimbabwe		ZW	16