IPv6 AS Names Directory: AS Name Optimum
Optimum - IPv6 Network Ranges (CIDRs)
                Optimum has 2 IPv6 network ranges (CIDR).
                                    Including: 2600:5400::/27, 2620:121:d000::/44
                                                
                            
                    This information corresponds to IPv6 addresses for AS Name Optimum, but this AS Name also has associated IPv4 address ranges.
                    
                        Check the IPv4 data for this AS Name
                    
                
            
            
            Download the complete list of CIDRs and AS numbers associated with Optimum for IPv6 in multiple formats: Text File (one per line), Comma Separated Text File, JSON or CSV File. The preview shows only a portion of the data, but these download options allow access to the full dataset.
Optimum - Autonomous System Numbers (AS)
                Optimum is associated with 1 AS number.
                                    The AS number is: AS19108
                            
            
            | IP Range | CIDR | ASN | AS Name | 
|---|---|---|---|
| 2600:5400:0000:0000:0000:0000:0000:0000 to 2600:541f:ffff:ffff:ffff:ffff:ffff:ffff | 2600:5400::/27 | AS19108 | Optimum | 
| 2620:0121:d000:0000:0000:0000:0000:0000 to 2620:0121:d00f:ffff:ffff:ffff:ffff:ffff | 2620:121:d000::/44 | AS19108 | Optimum | 
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