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ASN Lookup Tool
AS55 UPENN

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ASN Extended Info API & BGP Active Prefixes API
ASN Details
ASN
AS55
Organisation
University of Pennsylvania
Name
UPENN
Total IPv4 Addresses
261,888
Total IPv4 Prefixes
11
Total IPv6 Prefixes
16
Total IPv4 Bogon Prefixes
0
Total IPv6 Bogon Prefixes
0
IPv4 Space Rank
#959 out of 79,015
Registry
Arin
Registered Country
US flagUS
Registered Country Name
United States of America (the)
Registered Date
1985-12-18
Registration Last Change
2021-10-14
Receiving From
ASN
Organisation
AS3356
US flagLevel 3 Parent, LLC
AS174
US flagCogent Communications, LLC
AS11537
US flagInternet2
AS11164
US flagInternet2
Transit To
ASN
Organisation
AS46274
US flagPenn Medicine
AS69
US flagUniversity of Pennsylvania
IPv4 Active Prefixes
PrefixRange FromRange To
128.91.0.0/16128.91.0.0128.91.255.255
130.91.0.0/16130.91.0.0130.91.255.255
158.130.0.0/16158.130.0.0158.130.255.255
165.123.0.0/17165.123.0.0165.123.127.255
165.123.128.0/18165.123.128.0165.123.191.255
Showing 5 of 11
IPv6 Active Prefixes
PrefixRange FromRange To
2607:f470::/342607:f470::2607:f470:3fff:ffff:ffff:ffff:ffff:ffff
2607:f470:4000::/362607:f470:4000::2607:f470:4fff:ffff:ffff:ffff:ffff:ffff
2607:f470:5001::/482607:f470:5001::2607:f470:5001:ffff:ffff:ffff:ffff:ffff
2607:f470:5002::/472607:f470:5002::2607:f470:5003:ffff:ffff:ffff:ffff:ffff
2607:f470:5004::/462607:f470:5004::2607:f470:5007:ffff:ffff:ffff:ffff:ffff
Showing 5 of 16