Report for 17276

Name

SEIC-CORP-1 - SEI Investments, 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.

17276 SEIC-CORP-1 - SEI Investments, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS6461          ZAYO-6461 - Zayo Bandwidth, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
24356 AS17276        ORIGIN  Originate:       2048 /21.00  Transit:          0 /0.00  SEIC-CORP-1 - SEI Investments, 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       %
 8565 AS17276       SEIC-CORP-1 - SEI Investments, US                  8      8      3      3      5  62.50%


  Prefix               AS Path                              Aggregation Suggestion
  12.20.48.0/23        4777 2497 6461 17276 + Announce - aggregate of 12.20.48.0/24 (4777 2497 6461 17276) and 12.20.49.0/24 (4777 2497 6461 17276)
  12.20.48.0/24        4777 2497 6461 17276 - Withdrawn - aggregated with 12.20.49.0/24 (4777 2497 6461 17276)
  12.20.49.0/24        4777 2497 6461 17276 - Withdrawn - aggregated with 12.20.48.0/24 (4777 2497 6461 17276)
  170.76.224.0/23      4777 2497 6461 17276 + Announce - aggregate of 170.76.224.0/24 (4777 2497 6461 17276) and 170.76.225.0/24 (4777 2497 6461 17276)
  170.76.224.0/24      4777 2497 6461 17276 - Withdrawn - aggregated with 170.76.225.0/24 (4777 2497 6461 17276)
  170.76.225.0/24      4777 2497 6461 17276 - Withdrawn - aggregated with 170.76.224.0/24 (4777 2497 6461 17276)
  206.220.236.0/22     4777 2497 6461 17276 + Announce - aggregate of 206.220.236.0/23 (4777 2497 6461 17276) and 206.220.238.0/23 (4777 2497 6461 17276)
  206.220.236.0/24     4777 2497 6461 17276 - Withdrawn - aggregated with 206.220.237.0/24 (4777 2497 6461 17276)
  206.220.237.0/24     4777 2497 6461 17276 - Withdrawn - aggregated with 206.220.236.0/24 (4777 2497 6461 17276)
  206.220.238.0/24     4777 2497 6461 17276 - Withdrawn - aggregated with 206.220.239.0/24 (4777 2497 6461 17276)
  206.220.239.0/24     4777 2497 6461 17276 - Withdrawn - aggregated with 206.220.238.0/24 (4777 2497 6461 17276)

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

AS17276   8 More Specifics   8 Total Advertisements   SEIC-CORP-1 - SEI Investments, US
    12.20.48.0/24                 12.0.0.0/8
    12.20.49.0/24                 12.0.0.0/8
    170.76.224.0/24               170.76.224.0/23
    170.76.225.0/24               170.76.224.0/23
    206.220.236.0/24              206.220.236.0/22
    206.220.237.0/24              206.220.236.0/22
    206.220.238.0/24              206.220.236.0/22
    206.220.239.0/24              206.220.236.0/22

Whois Entry

whois: 402603

IANA has recorded AS17276 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS17276\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:       17276
             ASName:         SEIC-CORP-1
             ASHandle:       AS17276
             RegDate:        2000-08-15
             Updated:        2012-03-02
             Ref:            https://rdap.arin.net/registry/autnum/17276
             
             
             OrgName:        SEI Investments
             OrgId:          SEIINV-1
             Address:        1 Freedom Valley Dr
             City:           Oaks
             StateProv:      PA
             PostalCode:     19456
             Country:        US
             RegDate:        1998-10-08
             Updated:        2011-09-24
             Ref:            https://rdap.arin.net/registry/entity/SEIINV-1
             
             
             OrgTechHandle: KS11-ARIN
             OrgTechName:   Stueve, Kent 
             OrgTechPhone:  +1-610-254-5818 
             OrgTechEmail:  kstueve@seic.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/KS11-ARIN
             
             OrgAbuseHandle: KS11-ARIN
             OrgAbuseName:   Stueve, Kent 
             OrgAbusePhone:  +1-610-254-5818 
             OrgAbuseEmail:  kstueve@seic.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/KS11-ARIN
             
             RTechHandle: JS504-ARIN
             RTechName:   Stevenson, Joe 
             RTechPhone:  +1-610-676-1406 
             RTechEmail:  Jstevenson@seic.com
             RTechRef:    https://rdap.arin.net/registry/entity/JS504-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.
             #