Autonomous Systems are networks typically governed by large ISPs that participate in global Internet routing. Each network is assigned a unique identification number known as the AS number or ASN by the Internet Assigned Numbers Authority.
	
	
	
		
			
				
					| ASN | 11657 | 
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					| Name | LEGG-MASON-CORP-NET | 
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					| Organization | Legg Mason & Co., LLC | 
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					| Country | United States   | 
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					| Registry | ARIN | 
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					| IPv4 addresses | 512 | 
|---|
					| IPv6 /64 networks | 0 | 
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					| Prefixes | 2 | 
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						IPv4 Prefixes for AS11657					
					
						
							
								
									| Network | Location | Addresses | 
							
							
								
									| 216.251.208.0/24 | Legg Mason & Co., LLC |  Baltimore (Harbor East) | 256 | 
								
									| 216.251.210.0/24 | Legg Mason & Co., LLC |  Baltimore (Harbor East) | 256 |