Prefixes
13 · 4
IPv4 · IPv6
Network
AS1742
Harvard University
Harvard University announces 13 IPv4 prefixes (203.5K addresses) and 4 IPv6 prefixes from the United States. 88% of them are covered by valid RPKI records.
Address space
203.5K
IPv4 addresses · 69.6K IPv6 /48s
RPKI
88% valid0 invalid · 2 without a record
Peering
—
Not in PeeringDB
Details
Network
- Name
- Harvard University
- Country
- United States
- Registry
- ARIN
- Registered
- Feb 19, 199234 years ago
- UsersCloudflare Radar's estimate of people who reach the internet through this network.
- About 1.8K
- Abuse contact
- abuse@harvard.edu
Connectivity
Cloudflare Radar- UpstreamsNetworks this one buys transit from.
- Cogent CommunicationsLumen AS3356Internet2 I2PX
- PeersNetworks it exchanges traffic with directly, without paying either way.
- 2
- CustomersNetworks that buy transit from it.
- 2
Routing security
- ASPAAn RPKI record listing the only networks allowed to be its upstream providers, so routers can reject leaked or forged paths.
- Not published
- RPKI coverageShare of its announcements that a signed record (ROA) authorizes.
- 15 of 17 valid
- IncidentsPossible BGP hijacks (high-confidence detections) and route leaks involving this network in the last 30 days, from Cloudflare Radar.
- None in 30 days
Largest prefixes
IPv4
13- 128.103.0.0/16RPKI valid
- 131.142.0.0/16No ROA
- 140.247.0.0/16RPKI valid
- 65.112.0.0/20RPKI valid
- 67.134.204.0/22RPKI valid
- 199.94.60.0/22RPKI valid
- 140.247.111.0/24RPKI valid
- 140.247.152.0/24RPKI valid
- 140.247.174.0/24RPKI valid
- 140.247.236.0/24RPKI valid
- 192.5.66.0/24RPKI valid
- 192.54.223.0/24RPKI valid
- 192.131.102.0/24RPKI valid
IPv6
4- 2607:fb60::/32RPKI valid
- 2602:fca9::/36RPKI valid
- 2607:fb60:2404::/46RPKI valid
- 2620:32:8000::/48No ROA