Report for 237

Name

MERIT-AS-14 - Merit Network 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.

237 MERIT-AS-14 - Merit Network Inc., US

  Adjacency:    25  Upstream:     4  Downstream:    21
  Upstream Adjacent AS list
    AS11537         INTERNET2-RESEARCH-EDU - Internet2, US
    AS174           COGENT-174 - Cogent Communications, LLC, US
    AS7018          ATT-INTERNET4 - AT&T Enterprises, LLC, US
    AS1299          TWELVE99 Arelion, fka Telia Carrier, SE
  Downstream Adjacent AS list
    AS19106         ANDREWS - Andrews University, US
    AS15099         MONROE-COUNTY-MI-PUBLIC-ASN - County of Monroe, US
    AS25609         DMC - Detroit Medical Center, US
    AS393665        BAKERS - Baker College, US
    AS22251         REMC - Regional Educational Media Center 1 REMC1, US
    AS1432          AC-AS-1 - Albion College, US
    AS11206         FSU-AS-1 - Ferris State University, US
    AS400927        BARGER-CREEK - Barger Creek Wireless, US
    AS62676         UMD-PUBLIC-AS - University of Michigan - Dearborn, US
    AS11494         KELLOGGCC - Kellogg Community College, US
    AS229           MERIT-AS-6 - Merit Network Inc., US
    AS22217         CALVIN-UNIVERSITY - Calvin College, US
    AS1638          MCC-CAMPUS - Mott Community College, US
    AS27274         CMICH - Central Michigan University, US
    AS231           MISU-231 - Michigan State University, US
    AS393817        LMC-BH - Lake Michigan College, US
    AS46241         WASHTENAW-ISD-ASN - Washtenaw ISD, US
    AS396470        LCC-EDU - Lansing Community College, US
    AS62618         MICHIGANTECH - Michigan Technological University, US
    AS394769        UMF-7-AS - University of Michigan - Flint, US
    AS36375         UMICH-AS-5 - University of Michigan, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
230   AS237          ORG+TRN Originate:    2359808 /10.83  Transit:    1238272 /11.76 MERIT-AS-14 - Merit Network 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       %
 1785 AS237         MERIT-AS-14 - Merit Network Inc., US              83     39      8     52     31  37.35%


  Prefix               AS Path                              Aggregation Suggestion
  23.135.208.0/24      4777 2497 7018 237     
  35.16.0.0/16         4777 2516 1299 237     
  35.24.0.0/15         4777 2497 174 237    + Announce - aggregate of 35.24.0.0/16 (4777 2497 174 237) and 35.25.0.0/16 (4777 2497 174 237)
  35.24.0.0/17         4777 2497 174 237    - Withdrawn - aggregated with 35.24.128.0/17 (4777 2497 174 237)
  35.24.128.0/18       4777 2497 174 237    - Withdrawn - aggregated with 35.24.192.0/18 (4777 2497 174 237)
  35.24.192.0/19       4777 2497 174 237    - Withdrawn - aggregated with 35.24.224.0/19 (4777 2497 174 237)
  35.24.224.0/19       4777 2497 174 237    - Withdrawn - aggregated with 35.24.192.0/19 (4777 2497 174 237)
  35.25.0.0/16         4777 2497 174 237    - Withdrawn - aggregated with 35.24.0.0/16 (4777 2497 174 237)
  35.33.0.0/18         4608 7575 11537 237    
  35.33.5.0/24         4608 7575 11537 237  - Withdrawn - matching aggregate 35.33.0.0/18 4608 7575 11537 237
  35.33.6.0/24         4608 7575 11537 237  - Withdrawn - matching aggregate 35.33.0.0/18 4608 7575 11537 237
  35.33.96.0/19        4777 2516 1299 237     
  35.34.0.0/18         4777 2497 174 237      
  35.37.0.0/16         4777 2497 174 237      
  35.38.0.0/16         4777 2497 174 237      
  35.39.0.0/18         4777 2497 174 237    + Announce - aggregate of 35.39.0.0/19 (4777 2497 174 237) and 35.39.32.0/19 (4777 2497 174 237)
  35.39.0.0/19         4777 2497 174 237    - Withdrawn - aggregated with 35.39.32.0/19 (4777 2497 174 237)
  35.39.32.0/19        4777 2497 174 237    - Withdrawn - aggregated with 35.39.0.0/19 (4777 2497 174 237)
  35.39.64.0/19        4777 2497 174 237      
  35.39.128.0/17       4777 2497 174 237    + Announce - aggregate of 35.39.128.0/18 (4777 2497 174 237) and 35.39.192.0/18 (4777 2497 174 237)
  35.39.128.0/19       4777 2497 174 237    - Withdrawn - aggregated with 35.39.160.0/19 (4777 2497 174 237)
  35.39.160.0/19       4777 2497 174 237    - Withdrawn - aggregated with 35.39.128.0/19 (4777 2497 174 237)
  35.39.192.0/19       4777 2497 174 237    - Withdrawn - aggregated with 35.39.224.0/19 (4777 2497 174 237)
  35.39.224.0/19       4777 2497 174 237    - Withdrawn - aggregated with 35.39.192.0/19 (4777 2497 174 237)
  35.40.0.0/16         4777 2497 174 237      
  35.46.0.0/17         4777 2516 1299 237   + Announce - aggregate of 35.46.0.0/18 (4777 2516 1299 237) and 35.46.64.0/18 (4777 2516 1299 237)
  35.46.0.0/18         4777 2516 1299 237   - Withdrawn - aggregated with 35.46.64.0/18 (4777 2516 1299 237)
  35.46.64.0/18        4777 2516 1299 237   - Withdrawn - aggregated with 35.46.0.0/18 (4777 2516 1299 237)
  35.50.0.0/17         4777 2497 174 237      
  35.50.0.0/17         4777 2516 1299 237   + Announce - aggregate of 35.50.0.0/18 (4777 2516 1299 237) and 35.50.64.0/18 (4777 2516 1299 237)
  35.50.0.0/18         4777 2516 1299 237   - Withdrawn - aggregated with 35.50.64.0/18 (4777 2516 1299 237)
  35.50.64.0/18        4777 2516 1299 237   - Withdrawn - aggregated with 35.50.0.0/18 (4777 2516 1299 237)
  35.58.0.0/16         4777 2497 174 237      
  35.62.0.0/15         4777 2497 174 237    + Announce - aggregate of 35.62.0.0/16 (4777 2497 174 237) and 35.63.0.0/16 (4777 2497 174 237)
  35.62.0.0/16         4777 2497 174 237    - Withdrawn - aggregated with 35.63.0.0/16 (4777 2497 174 237)
  35.63.0.0/16         4777 2497 174 237    - Withdrawn - aggregated with 35.62.0.0/16 (4777 2497 174 237)
  35.64.0.0/14         4777 2497 174 237      
  35.68.0.0/15         4777 2497 174 237      
  35.70.0.0/16         4777 2497 174 237      
  35.71.0.0/18         4777 2497 174 237      
  74.115.236.0/23      4777 2516 1299 237     
  74.115.236.0/24      4777 2516 1299 237   - Withdrawn - matching aggregate 74.115.236.0/23 4777 2516 1299 237
  74.115.237.0/24      4777 2516 1299 237   - Withdrawn - matching aggregate 74.115.236.0/23 4777 2516 1299 237
  141.210.0.0/16       4777 2497 174 237      
  141.210.0.0/16       4777 2516 1299 237   + Announce - aggregate of 141.210.0.0/17 (4777 2516 1299 237) and 141.210.128.0/17 (4777 2516 1299 237)
  141.210.0.0/17       4777 2516 1299 237   - Withdrawn - aggregated with 141.210.128.0/17 (4777 2516 1299 237)
  141.210.32.0/19      4777 2516 1299 237   - Withdrawn - matching aggregate 141.210.0.0/17 4777 2516 1299 237
  141.210.128.0/17     4777 2516 1299 237   - Withdrawn - aggregated with 141.210.0.0/17 (4777 2516 1299 237)
  141.210.224.0/19     4777 2516 1299 237   - Withdrawn - matching aggregate 141.210.128.0/17 4777 2516 1299 237
  141.217.0.0/16       4777 2516 1299 237     
  141.218.0.0/16       4777 2516 1299 237     
  141.218.11.0/24      4777 2516 1299 237   - Withdrawn - matching aggregate 141.218.0.0/16 4777 2516 1299 237
  141.218.203.0/24     4777 2516 1299 237   - Withdrawn - matching aggregate 141.218.0.0/16 4777 2516 1299 237
  141.218.204.0/22     4777 2516 1299 237   - Withdrawn - matching aggregate 141.218.0.0/16 4777 2516 1299 237
  141.218.208.0/20     4777 2516 1299 237   - Withdrawn - matching aggregate 141.218.0.0/16 4777 2516 1299 237
  141.218.224.0/22     4777 2516 1299 237   - Withdrawn - matching aggregate 141.218.0.0/16 4777 2516 1299 237
  141.218.228.0/23     4777 2516 1299 237   - Withdrawn - matching aggregate 141.218.0.0/16 4777 2516 1299 237
  148.61.0.0/16        4777 2497 174 237      
  161.133.0.0/16       4777 2516 1299 237   + Announce - aggregate of 161.133.0.0/17 (4777 2516 1299 237) and 161.133.128.0/17 (4777 2516 1299 237)
  161.133.0.0/17       4777 2516 1299 237   - Withdrawn - aggregated with 161.133.128.0/17 (4777 2516 1299 237)
  161.133.2.0/24       4777 2516 1299 237   - Withdrawn - matching aggregate 161.133.0.0/17 4777 2516 1299 237
  161.133.104.0/21     4777 2516 1299 237   - Withdrawn - matching aggregate 161.133.0.0/17 4777 2516 1299 237
  161.133.112.0/21     4777 2516 1299 237   - Withdrawn - matching aggregate 161.133.0.0/17 4777 2516 1299 237
  161.133.120.0/21     4777 2516 1299 237   - Withdrawn - matching aggregate 161.133.0.0/17 4777 2516 1299 237
  161.133.128.0/17     4777 2516 1299 237   - Withdrawn - aggregated with 161.133.0.0/17 (4777 2516 1299 237)
  161.133.129.0/24     4777 2516 1299 237   - Withdrawn - matching aggregate 161.133.128.0/17 4777 2516 1299 237
  163.253.36.0/22      4777 2516 1299 237     
  164.76.0.0/16        4777 2516 1299 237     
  164.76.160.0/19      4777 2516 1299 237   - Withdrawn - matching aggregate 164.76.0.0/16 4777 2516 1299 237
  192.35.170.0/24      4777 2497 174 237      
  192.41.229.0/24      4777 2497 174 237      
  192.41.232.0/22      4777 2497 174 237      
  192.88.242.0/24      4777 2497 174 237      
  192.122.182.0/23     4777 2497 174 237      
  192.122.184.0/21     4777 2497 174 237      
  192.122.200.0/24     4777 2497 174 237      
  192.138.137.0/24     4777 2516 1299 237     
  192.160.192.0/24     4777 2516 1299 237     
  192.160.204.0/24     4777 2516 1299 237     
  192.188.100.0/24     4777 2516 1299 237     
  192.203.195.0/24     4777 2497 174 237      
  192.245.252.0/24     4777 2516 1299 237     
  192.245.254.0/24     4777 2516 1299 237     
  198.17.130.0/23      4777 2516 1299 237     
  198.17.132.0/23      4777 2516 1299 237     
  198.108.0.0/14       4777 2497 174 237      
  204.38.0.0/16        4777 2497 174 237      
  204.39.195.0/24      4777 2516 1299 237     
  206.201.157.0/24     4777 2516 1299 237     
  207.72.0.0/14        4777 2497 174 237      
  207.75.164.0/23      4777 2516 1299 237     

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

AS237   47 More Specifics   83 Total Advertisements   MERIT-AS-14 - Merit Network Inc., US
    35.24.0.0/17                  35.24.0.0/15
    35.24.128.0/18                35.24.0.0/15
    35.24.192.0/19                35.24.0.0/15
    35.24.224.0/19                35.24.0.0/15
    35.25.0.0/16                  35.24.0.0/15
    35.33.0.0/18                  35.33.0.0/17
    35.33.5.0/24                  35.33.0.0/17
    35.33.6.0/24                  35.33.0.0/17
    35.33.96.0/19                 35.33.0.0/17
    35.39.0.0/19                  35.39.0.0/18
    35.39.32.0/19                 35.39.0.0/18
    35.39.128.0/19                35.39.128.0/17
    35.39.160.0/19                35.39.128.0/17
    35.39.192.0/19                35.39.128.0/17
    35.39.224.0/19                35.39.128.0/17
    35.46.0.0/18                  35.46.0.0/16
    35.46.64.0/18                 35.46.0.0/16
    35.50.0.0/18                  35.50.0.0/17
    35.50.64.0/18                 35.50.0.0/17
    35.58.0.0/16                  35.58.0.0/15
    35.62.0.0/16                  35.62.0.0/15
    35.63.0.0/16                  35.62.0.0/15
    74.115.236.0/23               74.115.236.0/22
    74.115.236.0/24               74.115.236.0/22
    74.115.237.0/24               74.115.236.0/22
    141.210.0.0/17                141.210.0.0/16
    141.210.32.0/19               141.210.0.0/16
    141.210.128.0/17              141.210.0.0/16
    141.210.224.0/19              141.210.0.0/16
    141.218.11.0/24               141.218.0.0/16
    141.218.203.0/24              141.218.0.0/16
    141.218.204.0/22              141.218.0.0/16
    141.218.208.0/20              141.218.0.0/16
    141.218.224.0/22              141.218.0.0/16
    141.218.228.0/23              141.218.0.0/16
    161.133.0.0/17                161.133.0.0/16
    161.133.2.0/24                161.133.0.0/16
    161.133.104.0/21              161.133.0.0/16
    161.133.112.0/21              161.133.0.0/16
    161.133.120.0/21              161.133.0.0/16
    161.133.128.0/17              161.133.0.0/16
    161.133.129.0/24              161.133.0.0/16
    163.253.36.0/22               163.253.0.0/16
    164.76.160.0/19               164.76.0.0/16
    204.39.195.0/24               204.39.128.0/17
    206.201.157.0/24              206.201.144.0/20
    207.75.164.0/23               207.72.0.0/14

Whois Entry

whois: 402332

IANA has recorded AS237 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS237\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:       237
             ASName:         MERIT-AS-14
             ASHandle:       AS237
             RegDate:        1988-09-12
             Updated:        2012-04-02
             Ref:            https://rdap.arin.net/registry/autnum/237
             
             
             OrgName:        Merit Network Inc.
             OrgId:          MICH-Z
             Address:        880 Technology Dr., Suite B
             City:           Ann Arbor
             StateProv:      MI
             PostalCode:     48108
             Country:        US
             RegDate:        2009-12-08
             Updated:        2020-04-21
             Ref:            https://rdap.arin.net/registry/entity/MICH-Z
             
             
             OrgTechHandle: MERIT-ARIN
             OrgTechName:   Merit Operations
             OrgTechPhone:  +1-734-527-5717 
             OrgTechEmail:  operations@merit.edu
             OrgTechRef:    https://rdap.arin.net/registry/entity/MERIT-ARIN
             
             OrgAbuseHandle: NETWO26-ARIN
             OrgAbuseName:   Network Abuse
             OrgAbusePhone:  +1-734-527-5740 
             OrgAbuseEmail:  abuse@merit.edu
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO26-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.
             #