Report for 36671

Name

TWOSIGMA2 - TWO SIGMA INVESTMENTS, LP, 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 AS6447) 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.

36671 TWOSIGMA2, US

  Adjacency:     8  Upstream:     8  Downstream:     0
  Upstream Adjacent AS list
    AS6461          ZAYO-6461, US
    AS1299          TWELVE99 Arelion, fka Telia Carrier, SE
    AS174           COGENT-174, US
    AS3257          GTT-BACKBONE GTT, US
    AS3356          LEVEL3, US
    AS3491          CONSOLE-CONNECT-ASN, US
    AS7018          ATT-INTERNET4, US
    AS701           UUNET, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
16430 AS36671        ORIGIN  Originate:       4352 /19.91  Transit:          0 /0.00  TWOSIGMA2, 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       %
22470 AS36671       TWOSIGMA2, US                                     14      1      0     13      1   7.14%


  Prefix               AS Path                              Aggregation Suggestion
  8.2.105.0/24         7018 36671             
  8.245.33.0/24        57866 3491 36671       
  38.27.161.0/24       2914 174 36671         
  38.97.45.0/24        49788 1299 36671       
  38.108.14.0/24       2497 174 36671         
  38.117.134.0/24      49788 174 36671        
  46.183.200.0/24      49788 1299 36671       
  46.183.201.0/24      3257 36671 36671 36671 36671 36671 36671   
  207.226.133.0/24     3257 36671             
  208.77.212.0/22      7018 36671             
  208.77.212.0/24      49788 174 36671        
  208.77.213.0/24      57866 1299 36671       
  208.77.214.0/24      7018 36671           - Withdrawn - matching aggregate 208.77.212.0/22 7018 36671
  212.133.79.0/24      57866 3356 36671       

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

AS36671   11 More Specifics   12 Total Advertisements   TWOSIGMA2, US
    8.2.105.0/24                  8.0.0.0/13
    8.245.33.0/24                 8.244.0.0/14
    38.27.161.0/24                38.0.0.0/8
    38.108.14.0/24                38.0.0.0/8
    38.117.134.0/24               38.0.0.0/8
    77.77.172.0/24                77.77.128.0/18
    154.210.0.0/24                154.192.0.0/11
    207.226.133.0/24              207.226.0.0/16
    208.77.212.0/24               208.77.212.0/22
    208.77.213.0/24               208.77.212.0/22
    208.77.214.0/24               208.77.212.0/22

Whois Entry

whois: 402603

IANA has recorded AS36671 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS36671\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:       36671
             ASName:         TWOSIGMA2
             ASHandle:       AS36671
             RegDate:        2006-03-14
             Updated:        2012-10-10
             Ref:            https://rdap.arin.net/registry/autnum/36671
             
             
             OrgName:        TWO SIGMA INVESTMENTS, LP
             OrgId:          TSI-21
             Address:        100 Avenue of the Americas, 16th Floor
             City:           New York
             StateProv:      NY
             PostalCode:     10013
             Country:        US
             RegDate:        2001-10-30
             Updated:        2022-05-17
             Ref:            https://rdap.arin.net/registry/entity/TSI-21
             
             
             OrgAbuseHandle: ABUSE8450-ARIN
             OrgAbuseName:   abuse contact
             OrgAbusePhone:  +1-212-625-5700 
             OrgAbuseEmail:  abuse@twosigma.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE8450-ARIN
             
             OrgTechHandle: NETWO5478-ARIN
             OrgTechName:   Network Engineering
             OrgTechPhone:  +1-646-292-6288 
             OrgTechEmail:  neteng@twosigma.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO5478-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.
             #