SUBNET.IM

AS1742Harvard University

United StatesRegistryARIN

At a glance

IPv4 prefixes

13

IPv6 prefixes

4

IPv4 addresses

205k

IPv6 /64s

4.6B

Upstream graph

The networks AS1742 is seen behind, one and two hops out, drawn from real AS paths.

AS1742Toward the internet core
Upstream graph for AS1742: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1742Harvard UniversityThis networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS10578Harvard UniversityAS11164Internet2 I2PXAS11537Internet2AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS6939Hurricane Electri…AS2152CENIC - CalRENAS2497Internet Initiati…

Networks observed one and two hops upstream of AS1742 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

15

adjacent networks

Upstreams
533%
Peers
853%
Downstreams
213%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS1742
NetworkCountryRelationshipPathsVantage pts
AS3356Lumen (Level 3)USPeer1,17893
AS174Cogent Communications, LLCUSPeer91695
AS10578Harvard UniversityUSPeer16363
AS11164Internet2 I2PXUSPeer526
AS11537Internet2USPeer462

Prefixes

The largest blocks AS1742 originates, widest first.

Largest prefixes originated by AS1742
PrefixAddressesVisibility
128.103.0.0/1665.5k79/80
131.142.0.0/1665.5k79/80
140.247.0.0/1665.5k79/80
65.112.0.0/204.1k79/80
67.134.204.0/221k79/80
199.94.60.0/221k76/80
140.247.111.0/2425633/80
140.247.152.0/2425633/80
140.247.174.0/2425633/80
140.247.236.0/2425633/80

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.