Report for 19580

Name

ART-LLC - A.R.T. Advisors, LLC, US

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS2.0) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

19580 ART-LLC - A.R.T. Advisors, LLC, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS174           COGENT-174 - Cogent Communications, LLC, US
    AS3356          LEVEL3 - Level 3 Parent, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
23359 AS19580        ORIGIN  Originate:       2304 /20.83  Transit:          0 /0.00  ART-LLC - A.R.T. Advisors, LLC, US

Aggregation Suggestions

        Filter: Aggregates, Specifics

This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.

 Rank AS            AS Name                                      Current  Wthdw  Aggte  Annce Redctn       %
21540 AS19580       ART-LLC - A.R.T. Advisors, LLC, US                 9      2      1      8      1  11.11%


  Prefix               AS Path                              Aggregation Suggestion
  149.85.1.0/24        4777 2516 174 19580    
  149.85.2.0/24        4777 2516 3356 19580   
  149.85.5.0/24        4777 2516 3356 19580   
  149.85.6.0/23        4777 2516 3356 19580 + Announce - aggregate of 149.85.6.0/24 (4777 2516 3356 19580) and 149.85.7.0/24 (4777 2516 3356 19580)
  149.85.6.0/24        4777 2516 3356 19580 - Withdrawn - aggregated with 149.85.7.0/24 (4777 2516 3356 19580)
  149.85.7.0/24        4777 2516 3356 19580 - Withdrawn - aggregated with 149.85.6.0/24 (4777 2516 3356 19580)
  149.85.8.0/24        4777 2516 3356 19580   
  149.85.11.0/24       4777 2516 3356 19580   
  149.85.12.0/24       4777 2516 3356 19580   
  149.85.101.0/24      4777 2516 3356 19580   

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS19580   9 More Specifics   9 Total Advertisements   ART-LLC - A.R.T. Advisors, LLC, US
    149.85.1.0/24                 149.85.0.0/16
    149.85.2.0/24                 149.85.0.0/16
    149.85.5.0/24                 149.85.0.0/16
    149.85.6.0/24                 149.85.0.0/16
    149.85.7.0/24                 149.85.0.0/16
    149.85.8.0/24                 149.85.0.0/16
    149.85.11.0/24                149.85.0.0/16
    149.85.12.0/24                149.85.0.0/16
    149.85.101.0/24               149.85.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS19580 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS19580\n             
             #
             # ARIN WHOIS data and services are subject to the Terms of Use
             # available at: https://www.arin.net/resources/registry/whois/tou/
             #
             # If you see inaccuracies in the results, please report at
             # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
             #
             # Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
             #
             
             
             ASNumber:       19580
             ASName:         ART-LLC
             ASHandle:       AS19580
             RegDate:        2014-05-21
             Updated:        2014-05-21
             Ref:            https://rdap.arin.net/registry/autnum/19580
             
             
             OrgName:        A.R.T. Advisors, LLC
             OrgId:          AAL-140
             Address:        500 Park Ave.
             Address:        7th Floor
             City:           New York
             StateProv:      NY
             PostalCode:     10022
             Country:        US
             RegDate:        2014-04-18
             Updated:        2024-03-15
             Ref:            https://rdap.arin.net/registry/entity/AAL-140
             
             
             OrgTechHandle: ADMIN8650-ARIN
             OrgTechName:   Admins, System 
             OrgTechPhone:  +1-212-303-6167 
             OrgTechEmail:  support@art-llc.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/ADMIN8650-ARIN
             
             OrgAbuseHandle: ADMIN8650-ARIN
             OrgAbuseName:   Admins, System 
             OrgAbusePhone:  +1-212-303-6167 
             OrgAbuseEmail:  support@art-llc.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ADMIN8650-ARIN
             
             OrgDNSHandle: ADMIN8650-ARIN
             OrgDNSName:   Admins, System 
             OrgDNSPhone:  +1-212-303-6167 
             OrgDNSEmail:  support@art-llc.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/ADMIN8650-ARIN
             
             OrgNOCHandle: ADMIN8650-ARIN
             OrgNOCName:   Admins, System 
             OrgNOCPhone:  +1-212-303-6167 
             OrgNOCEmail:  support@art-llc.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/ADMIN8650-ARIN
             
             OrgRoutingHandle: ADMIN8650-ARIN
             OrgRoutingName:   Admins, System 
             OrgRoutingPhone:  +1-212-303-6167 
             OrgRoutingEmail:  support@art-llc.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/ADMIN8650-ARIN
             
             
             #
             # ARIN WHOIS data and services are subject to the Terms of Use
             # available at: https://www.arin.net/resources/registry/whois/tou/
             #
             # If you see inaccuracies in the results, please report at
             # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
             #
             # Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
             #