Report for 166

Name

IDA-AS - Institute for Defense Analyses, 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.

166 IDA-AS - Institute for Defense Analyses, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS6939          HURRICANE - Hurricane Electric LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
1787  AS166          ORIGIN  Originate:     134656 /14.96  Transit:          0 /0.00  IDA-AS - Institute for Defense Analyses, 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       %
 3445 AS166         IDA-AS - Institute for Defense Analyses, US       18     17      2      3     15  83.33%


  Prefix               AS Path                              Aggregation Suggestion
  129.246.0.0/16       4777 6939 166        + Announce - aggregate of 129.246.0.0/17 (4777 6939 166) and 129.246.128.0/17 (4777 6939 166)
  129.246.0.0/17       4777 6939 166        - Withdrawn - aggregated with 129.246.128.0/17 (4777 6939 166)
  129.246.101.0/24     4777 6939 166        - Withdrawn - matching aggregate 129.246.0.0/17 4777 6939 166
  129.246.128.0/17     4777 6939 166        - Withdrawn - aggregated with 129.246.0.0/17 (4777 6939 166)
  129.246.225.0/24     4777 6939 166        - Withdrawn - matching aggregate 129.246.128.0/17 4777 6939 166
  129.246.228.0/24     4777 6939 166        - Withdrawn - matching aggregate 129.246.128.0/17 4777 6939 166
  129.246.229.0/24     4777 6939 166        - Withdrawn - matching aggregate 129.246.128.0/17 4777 6939 166
  129.246.230.0/24     4777 6939 166        - Withdrawn - matching aggregate 129.246.128.0/17 4777 6939 166
  129.246.235.0/24     4777 6939 166        - Withdrawn - matching aggregate 129.246.128.0/17 4777 6939 166
  129.246.243.0/24     4777 6939 166        - Withdrawn - matching aggregate 129.246.128.0/17 4777 6939 166
  129.246.253.0/24     4777 6939 166        - Withdrawn - matching aggregate 129.246.128.0/17 4777 6939 166
  129.246.254.0/24     4777 6939 166        - Withdrawn - matching aggregate 129.246.128.0/17 4777 6939 166
  164.217.0.0/16       4777 6939 166        + Announce - aggregate of 164.217.0.0/17 (4777 6939 166) and 164.217.128.0/17 (4777 6939 166)
  164.217.0.0/17       4777 6939 166        - Withdrawn - aggregated with 164.217.128.0/17 (4777 6939 166)
  164.217.128.0/17     4777 6939 166        - Withdrawn - aggregated with 164.217.0.0/17 (4777 6939 166)
  164.217.225.0/24     4777 6939 166        - Withdrawn - matching aggregate 164.217.128.0/17 4777 6939 166
  164.217.228.0/24     4777 6939 166        - Withdrawn - matching aggregate 164.217.128.0/17 4777 6939 166
  164.217.253.0/24     4777 6939 166        - Withdrawn - matching aggregate 164.217.128.0/17 4777 6939 166
  164.217.254.0/24     4777 6939 166        - Withdrawn - matching aggregate 164.217.128.0/17 4777 6939 166
  198.133.241.0/24     4777 6939 166          

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

AS166   17 More Specifics   18 Total Advertisements   IDA-AS - Institute for Defense Analyses, US
    129.246.0.0/17                129.246.0.0/16
    129.246.101.0/24              129.246.0.0/16
    129.246.128.0/17              129.246.0.0/16
    129.246.225.0/24              129.246.0.0/16
    129.246.228.0/24              129.246.0.0/16
    129.246.229.0/24              129.246.0.0/16
    129.246.230.0/24              129.246.0.0/16
    129.246.235.0/24              129.246.0.0/16
    129.246.243.0/24              129.246.0.0/16
    129.246.253.0/24              129.246.0.0/16
    129.246.254.0/24              129.246.0.0/16
    164.217.0.0/17                164.217.0.0/16
    164.217.128.0/17              164.217.0.0/16
    164.217.225.0/24              164.217.0.0/16
    164.217.228.0/24              164.217.0.0/16
    164.217.253.0/24              164.217.0.0/16
    164.217.254.0/24              164.217.0.0/16

Whois Entry

whois: 402332

IANA has recorded AS166 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS166\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:       166
             ASName:         IDA-AS
             ASHandle:       AS166
             RegDate:        1988-03-29
             Updated:        2022-05-20
             Ref:            https://rdap.arin.net/registry/autnum/166
             
             
             OrgName:        Institute for Defense Analyses
             OrgId:          IDA-2-Z
             Address:        730 E Glebe Rd
             City:           Alexandria
             StateProv:      VA
             PostalCode:     22305
             Country:        US
             RegDate:        2010-02-01
             Updated:        2025-11-17
             Ref:            https://rdap.arin.net/registry/entity/IDA-2-Z
             
             
             OrgAbuseHandle: CMU49-ARIN
             OrgAbuseName:   Murphy, Chris 
             OrgAbusePhone:  +1-703-845-6833 
             OrgAbuseEmail:  cmurphy@ida.org
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/CMU49-ARIN
             
             OrgTechHandle: CMU49-ARIN
             OrgTechName:   Murphy, Chris 
             OrgTechPhone:  +1-703-845-6833 
             OrgTechEmail:  cmurphy@ida.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/CMU49-ARIN
             
             OrgRoutingHandle: TPHID-ARIN
             OrgRoutingName:   TPH61-IDA
             OrgRoutingPhone:  +1-703-845-2518 
             OrgRoutingEmail:  thurrell@ida.org
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/TPHID-ARIN
             
             OrgTechHandle: TPHID-ARIN
             OrgTechName:   TPH61-IDA
             OrgTechPhone:  +1-703-845-2518 
             OrgTechEmail:  thurrell@ida.org
             OrgTechRef:    https://rdap.arin.net/registry/entity/TPHID-ARIN
             
             OrgNOCHandle: TPHID-ARIN
             OrgNOCName:   TPH61-IDA
             OrgNOCPhone:  +1-703-845-2518 
             OrgNOCEmail:  thurrell@ida.org
             OrgNOCRef:    https://rdap.arin.net/registry/entity/TPHID-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.
             #