Report for 53428

Name

KCS-US-NEBIUS - Nebius 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.

53428 KCS-US-NEBIUS - Nebius Inc., US

  Adjacency:     2  Upstream:     2  Downstream:     0
  Upstream Adjacent AS list
    AS13335         CLOUDFLARENET - Cloudflare, Inc., US
    AS6939          HURRICANE - Hurricane Electric LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
15123 AS53428        ORIGIN  Originate:       5120 /19.68  Transit:          0 /0.00  KCS-US-NEBIUS - Nebius 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       %
23679 AS53428       KCS-US-NEBIUS - Nebius Inc., US                    9      1      0      8      1  11.11%


  Prefix               AS Path                              Aggregation Suggestion
  161.210.111.0/24     4608 13335 53428       
  204.12.160.0/22      4608 6939 53428 53428   
  204.12.160.0/24      4608 6939 53428 53428 - Withdrawn - matching aggregate 204.12.160.0/22 4608 6939 53428 53428
  204.12.164.0/24      4777 6939 53428 53428   
  204.12.165.0/24      4608 6939 53428 53428   
  204.12.166.0/23      4608 6939 53428 53428   
  204.12.168.0/22      4777 6939 53428 53428   
  204.12.172.0/23      4608 6939 53428 53428   
  204.12.188.0/22      4608 6939 53428 53428   

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

AS53428   8 More Specifics   9 Total Advertisements   KCS-US-NEBIUS - Nebius Inc., US
    204.12.160.0/22               204.12.160.0/19
    204.12.160.0/24               204.12.160.0/19
    204.12.164.0/24               204.12.160.0/19
    204.12.165.0/24               204.12.160.0/19
    204.12.166.0/23               204.12.160.0/19
    204.12.168.0/22               204.12.160.0/19
    204.12.172.0/23               204.12.160.0/19
    204.12.188.0/22               204.12.160.0/19

Whois Entry

whois: 402609

IANA has recorded AS53428 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS53428\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:       53428
             ASName:         KCS-US-NEBIUS
             ASHandle:       AS53428
             RegDate:        2024-12-13
             Updated:        2024-12-13
             Ref:            https://rdap.arin.net/registry/autnum/53428
             
             
             OrgName:        Nebius Inc.
             OrgId:          NB-374
             Address:        10 State street
             City:           Newburyport
             StateProv:      MA
             PostalCode:     01950
             Country:        US
             RegDate:        2024-08-06
             Updated:        2026-02-18
             Ref:            https://rdap.arin.net/registry/entity/NB-374
             
             
             OrgDNSHandle: GOROV-ARIN
             OrgDNSName:   Gorovoy, Alexey  
             OrgDNSPhone:  +31 0970 102 07775 
             OrgDNSEmail:  algorovoy@nebius.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/GOROV-ARIN
             
             OrgRoutingHandle: GOROV-ARIN
             OrgRoutingName:   Gorovoy, Alexey  
             OrgRoutingPhone:  +31 0970 102 07775 
             OrgRoutingEmail:  algorovoy@nebius.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/GOROV-ARIN
             
             OrgRoutingHandle: KIRKL97-ARIN
             OrgRoutingName:   Kirkland, Matthew 
             OrgRoutingPhone:  +1-555-555-5555 
             OrgRoutingEmail:  mattkirkland@nebius.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/KIRKL97-ARIN
             
             OrgTechHandle: LANET36-ARIN
             OrgTechName:   Lanetskiy, Alexey 
             OrgTechPhone:  +1-555-555-5555 
             OrgTechEmail:  xcore@nebius.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/LANET36-ARIN
             
             OrgRoutingHandle: ROUTI74-ARIN
             OrgRoutingName:   Routing
             OrgRoutingPhone:  +3197010256911 
             OrgRoutingEmail:  dgo@nebius.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/ROUTI74-ARIN
             
             OrgDNSHandle: ROUTI74-ARIN
             OrgDNSName:   Routing
             OrgDNSPhone:  +3197010256911 
             OrgDNSEmail:  dgo@nebius.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/ROUTI74-ARIN
             
             OrgTechHandle: GOROV-ARIN
             OrgTechName:   Gorovoy, Alexey  
             OrgTechPhone:  +31 0970 102 07775 
             OrgTechEmail:  algorovoy@nebius.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/GOROV-ARIN
             
             OrgTechHandle: KIRKL97-ARIN
             OrgTechName:   Kirkland, Matthew 
             OrgTechPhone:  +1-555-555-5555 
             OrgTechEmail:  mattkirkland@nebius.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/KIRKL97-ARIN
             
             OrgTechHandle: LUKAS26-ARIN
             OrgTechName:   Lukashkin, Alexander 
             OrgTechPhone:  +31630969429 
             OrgTechEmail:  aslukashkin@nebius.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/LUKAS26-ARIN
             
             OrgTechHandle: ROUTI74-ARIN
             OrgTechName:   Routing
             OrgTechPhone:  +3197010256911 
             OrgTechEmail:  dgo@nebius.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/ROUTI74-ARIN
             
             OrgNOCHandle: SIMAK-ARIN
             OrgNOCName:   Simakov, Aleksei 
             OrgNOCPhone:  +310617219655 
             OrgNOCEmail:  alex@nebius.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/SIMAK-ARIN
             
             OrgTechHandle: SIMAK-ARIN
             OrgTechName:   Simakov, Aleksei 
             OrgTechPhone:  +310617219655 
             OrgTechEmail:  alex@nebius.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/SIMAK-ARIN
             
             OrgTechHandle: CROXF3-ARIN
             OrgTechName:   Croxford, Keith 
             OrgTechPhone:  +3197010256911 
             OrgTechEmail:  kcroxford@nebius.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/CROXF3-ARIN
             
             OrgAbuseHandle: SIMAK-ARIN
             OrgAbuseName:   Simakov, Aleksei 
             OrgAbusePhone:  +310617219655 
             OrgAbuseEmail:  alex@nebius.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/SIMAK-ARIN
             
             OrgDNSHandle: LANET36-ARIN
             OrgDNSName:   Lanetskiy, Alexey 
             OrgDNSPhone:  +1-555-555-5555 
             OrgDNSEmail:  xcore@nebius.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/LANET36-ARIN
             
             OrgDNSHandle: KIRKL97-ARIN
             OrgDNSName:   Kirkland, Matthew 
             OrgDNSPhone:  +1-555-555-5555 
             OrgDNSEmail:  mattkirkland@nebius.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/KIRKL97-ARIN
             
             OrgDNSHandle: CROXF3-ARIN
             OrgDNSName:   Croxford, Keith 
             OrgDNSPhone:  +3197010256911 
             OrgDNSEmail:  kcroxford@nebius.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/CROXF3-ARIN
             
             OrgRoutingHandle: SIMAK-ARIN
             OrgRoutingName:   Simakov, Aleksei 
             OrgRoutingPhone:  +310617219655 
             OrgRoutingEmail:  alex@nebius.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/SIMAK-ARIN
             
             OrgTechHandle: TIKHO2-ARIN
             OrgTechName:   Tikhonov, Andrei 
             OrgTechPhone:  +31 6 49 7881 36 
             OrgTechEmail:  antixonov@nebius.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/TIKHO2-ARIN
             
             OrgRoutingHandle: LANET36-ARIN
             OrgRoutingName:   Lanetskiy, Alexey 
             OrgRoutingPhone:  +1-555-555-5555 
             OrgRoutingEmail:  xcore@nebius.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/LANET36-ARIN
             
             OrgDNSHandle: SIMAK-ARIN
             OrgDNSName:   Simakov, Aleksei 
             OrgDNSPhone:  +310617219655 
             OrgDNSEmail:  alex@nebius.com
             OrgDNSRef:    https://rdap.arin.net/registry/entity/SIMAK-ARIN
             
             OrgTechHandle: KORSA5-ARIN
             OrgTechName:   korsakov, vladimir 
             OrgTechPhone:  +31630496070 
             OrgTechEmail:  scamp@nebius.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/KORSA5-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.
             #