Report for 27311

Name

AS27311 - Biogen MA Inc, 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.

27311 AS27311 - Biogen MA Inc, US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS5400          BT - British Telecommunications PLC, GB
    AS701           UUNET - Verizon Business, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
35440 AS27311        ORIGIN  Originate:       1024 /22.00  Transit:          0 /0.00  AS27311 - Biogen MA Inc, 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       %
37909 AS27311       AS27311 - Biogen MA Inc, US                        4      0      0      4      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  161.199.168.0/24     4777 2516 701 27311    
  161.199.170.0/24     4777 2516 5400 27311   
  161.199.171.0/24     4777 2516 701 27311    
  198.180.131.0/24     4777 2516 701 27311    

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

AS27311   3 More Specifics   4 Total Advertisements   AS27311 - Biogen MA Inc, US
    161.199.168.0/24              161.199.168.0/22
    161.199.170.0/24              161.199.168.0/22
    161.199.171.0/24              161.199.168.0/22

Whois Entry

whois: 402603

IANA has recorded AS27311 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS27311\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:       27311
             ASName:         AS27311
             ASHandle:       AS27311
             RegDate:        2015-11-05
             Updated:        2015-11-05
             Ref:            https://rdap.arin.net/registry/autnum/27311
             
             
             OrgName:        Biogen MA Inc
             OrgId:          BIOGEN
             Address:        14 Cambridge Center
             City:           Cambridge
             StateProv:      MA
             PostalCode:     02142
             Country:        US
             RegDate:        1993-08-02
             Updated:        2025-09-04
             Ref:            https://rdap.arin.net/registry/entity/BIOGEN
             
             
             OrgAbuseHandle: DNA55-ARIN
             OrgAbuseName:   Domain Names Admin
             OrgAbusePhone:  +1-617-679-2796 
             OrgAbuseEmail:  domainnamesadmin@biogenidec.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/DNA55-ARIN
             
             OrgTechHandle: DNA55-ARIN
             OrgTechName:   Domain Names Admin
             OrgTechPhone:  +1-617-679-2796 
             OrgTechEmail:  domainnamesadmin@biogenidec.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/DNA55-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.
             #