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ASN Lookup Tool
AS1742 HARVARD-UNIV

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS1742
Organisation
Harvard University
Name
HARVARD-UNIV
Total IPv4 Addresses
203,264
Total IPv4 Prefixes
48
Total IPv6 Prefixes
17
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#1,114 out of 79,053
Registry
Arin
Registered Country
US flagUS
Registered Country Name
United States of America (the)
Registered Date
1992-02-19
Registration Last Change
2023-12-21
Receiving From

The list of active Autonomous Systems (ASs) which send traffic to that ASN.

ASN
Organisation
AS3356
US flagLevel 3 Parent, LLC
AS174
US flagCogent Communications
AS10578
US flagHarvard University
AS11537
US flagInternet2
AS11164
US flagInternet2
Transit To

The list of active Autonomous Systems (ASs) which receive traffic from that ASN.

 

ASN
Organisation
AS40127
US flagLongwood Medical and Academic Area (LMA)
AS13315
US flagHarvard Business School
IPv4 Active Prefixes

This provides the list of IPv4 address space routes/prefixes currently announced on Border Gateway Protocol (BGP).

PrefixRange FromRange To
65.112.0.0/2065.112.0.065.112.15.255
67.134.204.0/2267.134.204.067.134.207.255
128.103.0.0/17128.103.0.0128.103.127.255
128.103.128.0/18128.103.128.0128.103.191.255
128.103.192.0/21128.103.192.0128.103.199.255
Showing 5 of 48
IPv6 Active Prefixes
PrefixRange FromRange To
2602:fca9::/362602:fca9::2602:fca9:fff:ffff:ffff:ffff:ffff:ffff
2607:fb60::/352607:fb60::2607:fb60:1fff:ffff:ffff:ffff:ffff:ffff
2607:fb60:2000::/382607:fb60:2000::2607:fb60:23ff:ffff:ffff:ffff:ffff:ffff
2607:fb60:2400::/462607:fb60:2400::2607:fb60:2403:ffff:ffff:ffff:ffff:ffff
2607:fb60:2404::/462607:fb60:2404::2607:fb60:2407:ffff:ffff:ffff:ffff:ffff
Showing 5 of 17