AS1742

Name: AS1742 — Harvard University
Creator: ipdex

Harvard University Unknown registered in United States

9IPv4 prefixes

3IPv6 prefixes

83%RPKI-valid

#3,700AS Rank

327/327RIS visibility

#2,763Rank in United States

1992-02-19Allocated

Harvard University (AS1742) — Unknown, registered in United States. announces 9 IPv4 prefixes + 3 IPv6 prefixes. Rank in United States: #2763. Allocated: 1992-02-19.

IPv4 9IPv6 3

Announced prefixes · 12

v4 128.103.0.0/16 valid
v4 131.142.0.0/16 unknown
v4 140.247.0.0/16 valid
v4 192.131.102.0/24 valid
v4 192.5.66.0/24 valid
v4 192.54.223.0/24 valid
v4 199.94.60.0/22 valid
v4 65.112.0.0/20 valid
v4 67.134.204.0/22 valid
v6 2602:fca9::/36 valid
v6 2607:fb60::/32 valid
v6 2620:32:8000::/48 unknown

RPKI: rpki.cloudflare.com · 2026-06-17

Routing: 9 IPv4 · 3 IPv6 announced · RIS visibility 327/327 RIS peers · RIPEstat · 2026-06-17

Prefix history

Announced prefixes Source: ipdex daily snapshot · sparse rows, value holds until the next change (steps)

Data table

Day	Announced prefixes
2026-06-12	17
2026-06-13	17
2026-06-17	12

AS topology · Customer cone 6

Providers · 5

AS3356 Level 3 Parent, LLC
AS174 Cogent Communications, LLC
AS11537 Internet2
AS11164 Internet2
AS10578 Harvard University

Customers · 2

AS40127 Longwood Medical and Academic Area (LMA)
AS13315 Harvard Business School

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