Report for 397027

Name

BLOCK-LINE-DENVER - Block Line Systems, LLC, 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.

397027 BLOCK-LINE-DENVER - Block Line Systems, LLC, US

  Adjacency:     2  Upstream:     1  Downstream:     1
  Upstream Adjacent AS list
    AS6939          HURRICANE - Hurricane Electric LLC, US
  Downstream Adjacent AS list
    AS46181         MAXXSOUTH-BROADBAND - BCI Mississippi Broadband,LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
18567 AS397027       ORG+TRN Originate:       3840 /20.09  Transit:        256 /24.00 BLOCK-LINE-DENVER - Block Line Systems, LLC, 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       %
 6290 AS397027      BLOCK-LINE-DENVER - Block Line Systems, LLC,       9      9      1      1      8  88.89%


  Prefix               AS Path                              Aggregation Suggestion
  24.53.152.0/21       4777 6939 397027     + Announce - aggregate of 24.53.152.0/22 (4777 6939 397027) and 24.53.156.0/22 (4777 6939 397027)
  24.53.152.0/22       4777 6939 397027     - Withdrawn - aggregated with 24.53.156.0/22 (4777 6939 397027)
  24.53.152.0/24       4777 6939 397027     - Withdrawn - matching aggregate 24.53.152.0/22 4777 6939 397027
  24.53.154.0/24       4777 6939 397027     - Withdrawn - matching aggregate 24.53.152.0/22 4777 6939 397027
  24.53.155.0/24       4777 6939 397027     - Withdrawn - matching aggregate 24.53.152.0/22 4777 6939 397027
  24.53.156.0/22       4777 6939 397027     - Withdrawn - aggregated with 24.53.152.0/22 (4777 6939 397027)
  24.53.156.0/24       4777 6939 397027     - Withdrawn - matching aggregate 24.53.156.0/22 4777 6939 397027
  24.53.157.0/24       4777 6939 397027     - Withdrawn - matching aggregate 24.53.156.0/22 4777 6939 397027
  24.53.158.0/24       4777 6939 397027     - Withdrawn - matching aggregate 24.53.156.0/22 4777 6939 397027
  24.53.159.0/24       4777 6939 397027     - Withdrawn - matching aggregate 24.53.156.0/22 4777 6939 397027

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

AS397027   9 More Specifics   9 Total Advertisements   BLOCK-LINE-DENVER - Block Line Systems, LLC, US
    24.53.152.0/22                24.53.128.0/18
    24.53.152.0/24                24.53.128.0/18
    24.53.154.0/24                24.53.128.0/18
    24.53.155.0/24                24.53.128.0/18
    24.53.156.0/22                24.53.128.0/18
    24.53.156.0/24                24.53.128.0/18
    24.53.157.0/24                24.53.128.0/18
    24.53.158.0/24                24.53.128.0/18
    24.53.159.0/24                24.53.128.0/18

Whois Entry

whois: 402332

IANA has recorded AS397027 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS397027\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:       397027
             ASName:         BLOCK-LINE-DENVER
             ASHandle:       AS397027
             RegDate:        2018-08-31
             Updated:        2018-08-31
             Ref:            https://rdap.arin.net/registry/autnum/397027
             
             
             OrgName:        Block Line Systems, LLC
             OrgId:          BLSL
             Address:        1645 West Chester Pike
             Address:        Suite 200
             City:           West Chester
             StateProv:      PA
             PostalCode:     19382
             Country:        US
             RegDate:        2015-11-12
             Updated:        2025-09-16
             Ref:            https://rdap.arin.net/registry/entity/BLSL
             
             ReferralServer:  rwhois://rwhois.infinitecom.net:4321
             
             OrgTechHandle: MST395-ARIN
             OrgTechName:   Totoro, Michael Steven
             OrgTechPhone:  +1-610-355-9781 
             OrgTechEmail:  mtotoro@trusttelesystem.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/MST395-ARIN
             
             OrgTechHandle: INE20-ARIN
             OrgTechName:   IP Network Engineering
             OrgTechPhone:  +1-419-724-3884 
             OrgTechEmail:  chustwayte@sharedsvcs.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/INE20-ARIN
             
             OrgTechHandle: OWOLA3-ARIN
             OrgTechName:   Owolabi, Olu 
             OrgTechPhone:  +1-484-250-0957 
             OrgTechEmail:  oowolabi@trusttelesystem.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/OWOLA3-ARIN
             
             OrgAbuseHandle: IAA18-ARIN
             OrgAbuseName:   IP Address Administrator
             OrgAbusePhone:  +1-610-918-1646 
             OrgAbuseEmail:  IPAdmin@infinitecomllc.com
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/IAA18-ARIN
             
             OrgNOCHandle: INE20-ARIN
             OrgNOCName:   IP Network Engineering
             OrgNOCPhone:  +1-419-724-3884 
             OrgNOCEmail:  chustwayte@sharedsvcs.com
             OrgNOCRef:    https://rdap.arin.net/registry/entity/INE20-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.
             #
             
             
             
             Found a referral to rwhois.infinitecom.net:4321.
             
             %rwhois V-1.5:003fff:00 phl-401nb-lsrv-rwhois.infinitecom.net (by Network Solutions, Inc. V-1.5.9.6)
             %error 230 No Objects Found