Report for 25883

Name

CITIGROUP - Citigroup 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.

25883 CITIGROUP - Citigroup Inc., US

  Adjacency:     3  Upstream:     2  Downstream:     1
  Upstream Adjacent AS list
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS701           UUNET - Verizon Business, US
  Downstream Adjacent AS list
    AS33463         CITIGROUP-GLOBAL-ANYCAST-DNS - Citigroup Inc., US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
18568 AS25883        ORG+TRN Originate:       3584 /20.19  Transit:        256 /24.00 CITIGROUP - Citigroup 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       %
10003 AS25883       CITIGROUP - Citigroup Inc., US                    14      8      4     10      4  28.57%


  Prefix               AS Path                              Aggregation Suggestion
  192.193.8.0/24       4777 2516 3356 25883   
  192.193.39.0/24      4777 2516 701 25883    
  192.193.40.0/23      4777 2516 3356 25883 + Announce - aggregate of 192.193.40.0/24 (4777 2516 3356 25883) and 192.193.41.0/24 (4777 2516 3356 25883)
  192.193.40.0/24      4777 2516 3356 25883 - Withdrawn - aggregated with 192.193.41.0/24 (4777 2516 3356 25883)
  192.193.41.0/24      4777 2516 3356 25883 - Withdrawn - aggregated with 192.193.40.0/24 (4777 2516 3356 25883)
  192.193.102.0/23     4777 2516 3356 25883 + Announce - aggregate of 192.193.102.0/24 (4777 2516 3356 25883) and 192.193.103.0/24 (4777 2516 3356 25883)
  192.193.102.0/24     4777 2516 3356 25883 - Withdrawn - aggregated with 192.193.103.0/24 (4777 2516 3356 25883)
  192.193.103.0/24     4777 2516 3356 25883 - Withdrawn - aggregated with 192.193.102.0/24 (4777 2516 3356 25883)
  192.193.104.0/23     4777 2516 3356 25883 + Announce - aggregate of 192.193.104.0/24 (4777 2516 3356 25883) and 192.193.105.0/24 (4777 2516 3356 25883)
  192.193.104.0/24     4777 2516 3356 25883 - Withdrawn - aggregated with 192.193.105.0/24 (4777 2516 3356 25883)
  192.193.105.0/24     4777 2516 3356 25883 - Withdrawn - aggregated with 192.193.104.0/24 (4777 2516 3356 25883)
  192.193.171.0/24     4777 2516 701 25883    
  192.193.178.0/23     4777 2516 3356 25883 + Announce - aggregate of 192.193.178.0/24 (4777 2516 3356 25883) and 192.193.179.0/24 (4777 2516 3356 25883)
  192.193.178.0/24     4777 2516 3356 25883 - Withdrawn - aggregated with 192.193.179.0/24 (4777 2516 3356 25883)
  192.193.179.0/24     4777 2516 3356 25883 - Withdrawn - aggregated with 192.193.178.0/24 (4777 2516 3356 25883)
  192.193.185.0/24     4777 2516 3356 25883   
  192.193.222.0/24     4777 2516 701 25883    
  199.67.180.0/24      4777 2516 3356 25883   

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

AS25883   14 More Specifics   14 Total Advertisements   CITIGROUP - Citigroup Inc., US
    192.193.8.0/24                192.193.0.0/16
    192.193.39.0/24               192.193.0.0/16
    192.193.40.0/24               192.193.0.0/16
    192.193.41.0/24               192.193.0.0/16
    192.193.102.0/24              192.193.0.0/16
    192.193.103.0/24              192.193.0.0/16
    192.193.104.0/24              192.193.0.0/16
    192.193.105.0/24              192.193.0.0/16
    192.193.171.0/24              192.193.0.0/16
    192.193.178.0/24              192.193.0.0/16
    192.193.179.0/24              192.193.0.0/16
    192.193.185.0/24              192.193.0.0/16
    192.193.222.0/24              192.193.0.0/16
    199.67.180.0/24               199.67.128.0/18

Whois Entry

whois: 402603

IANA has recorded AS25883 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS25883\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:       25883
             ASName:         CITIGROUP
             ASHandle:       AS25883
             RegDate:        2002-05-24
             Updated:        2012-03-02
             Ref:            https://rdap.arin.net/registry/autnum/25883
             
             
             OrgName:        Citigroup Inc.
             OrgId:          CITIGR-5
             Address:        283 King George Rd
             City:           Warren
             StateProv:      NJ
             PostalCode:     07059
             Country:        US
             RegDate:        2002-05-24
             Updated:        2026-03-24
             Ref:            https://rdap.arin.net/registry/entity/CITIGR-5
             
             
             OrgTechHandle: PENAR13-ARIN
             OrgTechName:   Pena, Ray 
             OrgTechPhone:  +1-631-712-7472 
             OrgTechEmail:  raymond.i.pena@citi.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/PENAR13-ARIN
             
             OrgTechHandle: GLORI13-ARIN
             OrgTechName:   Gloria, Ana 
             OrgTechPhone:  +1-855-384-4622 
             OrgTechEmail:  ipbillingservices@citi.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/GLORI13-ARIN
             
             OrgAbuseHandle: ABUSE9564-ARIN
             OrgAbuseName:   Abuse
             OrgAbusePhone:  +1-855-384-4622 
             OrgAbuseEmail:  domain.admin@citi.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE9564-ARIN
             
             OrgTechHandle: WANGI-ARIN
             OrgTechName:   Wangin, Bartosz 
             OrgTechPhone:  +48501635874 
             OrgTechEmail:  bartosz.wangin@citi.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/WANGI-ARIN
             
             OrgTechHandle: CIS27-ARIN
             OrgTechName:   Citigroup IP Services
             OrgTechPhone:  +1-631-712-8024 
             OrgTechEmail:  iptechservices@citi.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/CIS27-ARIN
             
             OrgTechHandle: EATON72-ARIN
             OrgTechName:   Eaton, Melissa 
             OrgTechPhone:  +1-855-384-4622 
             OrgTechEmail:  ipbillingservices@citi.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/EATON72-ARIN
             
             RTechHandle: RC1630-ARIN
             RTechName:   Centra, Rob 
             RTechPhone:  +1-212-816-0884 
             RTechEmail:  network.addressmngt@iuo.ssmb.com
             RTechRef:    https://rdap.arin.net/registry/entity/RC1630-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.
             #