Report for 27370

Name

CITYOFBOSTON - City of Boston, 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.

27370 CITYOFBOSTON - City of Boston, US

  Adjacency:     3  Upstream:     3  Downstream:     0
  Upstream Adjacent AS list
    AS46887         CROWNCASTLE-AS46887 - Crown Castle Fiber LLC, US
    AS27552         TWDX - TowardEX Technologies International, Inc., US
    AS54004         LIGHTPATH - Cablevision Lightpath LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
2758  AS27370        ORIGIN  Originate:      77824 /15.75  Transit:          0 /0.00  CITYOFBOSTON - City of Boston, 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       %
 4855 AS27370       CITYOFBOSTON - City of Boston, US                 14     10      0      4     10  71.43%


  Prefix               AS Path                              Aggregation Suggestion
  140.241.0.0/16       4608 6939 54004 27370   
  140.241.3.0/24       4608 6939 54004 27370 - Withdrawn - matching aggregate 140.241.0.0/16 4608 6939 54004 27370
  140.241.14.0/24      4608 6939 54004 27370 - Withdrawn - matching aggregate 140.241.0.0/16 4608 6939 54004 27370
  140.241.25.0/24      4608 6939 54004 27370 - Withdrawn - matching aggregate 140.241.0.0/16 4608 6939 54004 27370
  140.241.86.0/24      4608 6939 54004 27370 - Withdrawn - matching aggregate 140.241.0.0/16 4608 6939 54004 27370
  140.241.244.0/24     4608 6939 54004 27370 - Withdrawn - matching aggregate 140.241.0.0/16 4608 6939 54004 27370
  140.241.250.0/24     4608 6939 54004 27370 - Withdrawn - matching aggregate 140.241.0.0/16 4608 6939 54004 27370
  192.80.65.0/24       4608 6939 54004 27370   
  204.167.88.0/24      4777 2497 701 27552 27370   
  216.163.208.0/20     4608 6939 54004 27370   
  216.163.208.0/21     4608 6939 54004 27370 - Withdrawn - matching aggregate 216.163.208.0/20 4608 6939 54004 27370
  216.163.216.0/21     4608 6939 54004 27370 - Withdrawn - matching aggregate 216.163.208.0/20 4608 6939 54004 27370
  216.163.216.0/22     4608 6939 54004 27370 - Withdrawn - matching aggregate 216.163.208.0/20 4608 6939 54004 27370
  216.163.220.0/22     4608 6939 54004 27370 - Withdrawn - matching aggregate 216.163.208.0/20 4608 6939 54004 27370

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

AS27370   11 More Specifics   14 Total Advertisements   CITYOFBOSTON - City of Boston, US
    140.241.3.0/24                140.241.0.0/16
    140.241.14.0/24               140.241.0.0/16
    140.241.25.0/24               140.241.0.0/16
    140.241.86.0/24               140.241.0.0/16
    140.241.244.0/24              140.241.0.0/16
    140.241.250.0/24              140.241.0.0/16
    204.167.88.0/24               204.164.0.0/14
    216.163.208.0/21              216.163.208.0/20
    216.163.216.0/21              216.163.208.0/20
    216.163.216.0/22              216.163.208.0/20
    216.163.220.0/22              216.163.208.0/20

Whois Entry

whois: 402599

IANA has recorded AS27370 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS27370\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:       27370
             ASName:         CITYOFBOSTON
             ASHandle:       AS27370
             RegDate:        2003-02-21
             Updated:        2024-05-03
             Ref:            https://rdap.arin.net/registry/autnum/27370
             
             
             OrgName:        City of Boston
             OrgId:          CITYOF-198
             Address:        1 CITY HALL SQ, RM 703
             City:           BOSTON
             StateProv:      MA
             PostalCode:     02201
             Country:        US
             RegDate:        1999-07-20
             Updated:        2024-05-03
             Comment:        http://www.boston.gov/
             Ref:            https://rdap.arin.net/registry/entity/CITYOF-198
             
             
             OrgDNSHandle: HOSTM1518-ARIN
             OrgDNSName:   Hostmaster
             OrgDNSPhone:  +1-617-635-3594 
             OrgDNSEmail:  hostmaster@cityofboston.gov
             OrgDNSRef:    https://rdap.arin.net/registry/entity/HOSTM1518-ARIN
             
             OrgNOCHandle: NOC11232-ARIN
             OrgNOCName:   NOC
             OrgNOCPhone:  +1-617-635-2342 
             OrgNOCEmail:  brett.haynes@boston.gov
             OrgNOCRef:    https://rdap.arin.net/registry/entity/NOC11232-ARIN
             
             OrgTechHandle: NOC11232-ARIN
             OrgTechName:   NOC
             OrgTechPhone:  +1-617-635-2342 
             OrgTechEmail:  brett.haynes@boston.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/NOC11232-ARIN
             
             OrgAbuseHandle: NOC11232-ARIN
             OrgAbuseName:   NOC
             OrgAbusePhone:  +1-617-635-2342 
             OrgAbuseEmail:  brett.haynes@boston.gov
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/NOC11232-ARIN
             
             OrgTechHandle: HOSTM1518-ARIN
             OrgTechName:   Hostmaster
             OrgTechPhone:  +1-617-635-3594 
             OrgTechEmail:  hostmaster@cityofboston.gov
             OrgTechRef:    https://rdap.arin.net/registry/entity/HOSTM1518-ARIN
             
             OrgRoutingHandle: NOC11232-ARIN
             OrgRoutingName:   NOC
             OrgRoutingPhone:  +1-617-635-2342 
             OrgRoutingEmail:  brett.haynes@boston.gov
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/NOC11232-ARIN
             
             RAbuseHandle: NOC11232-ARIN
             RAbuseName:   NOC
             RAbusePhone:  +1-617-635-2342 
             RAbuseEmail:  brett.haynes@boston.gov
             RAbuseRef:    https://rdap.arin.net/registry/entity/NOC11232-ARIN
             
             RNOCHandle: NOC11232-ARIN
             RNOCName:   NOC
             RNOCPhone:  +1-617-635-2342 
             RNOCEmail:  brett.haynes@boston.gov
             RNOCRef:    https://rdap.arin.net/registry/entity/NOC11232-ARIN
             
             RTechHandle: NOC11232-ARIN
             RTechName:   NOC
             RTechPhone:  +1-617-635-2342 
             RTechEmail:  brett.haynes@boston.gov
             RTechRef:    https://rdap.arin.net/registry/entity/NOC11232-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.
             #