All ASNs

Autonomous System details for AS1742

AS1742

Harvard University • harvard.edu

AS1742 — Harvard University

AS Name

HARVARD-UNIV

Country

United States (US)

Website

harvard.edu

Number of IPv4

204,544

Number of IPv6

8.42 × 10²⁸

ASN type

Education

Status

Assigned

Registry

ARIN

Allocated

February 19, 1992

Last updated

December 21, 2023

IP Ranges

13 IPv4 prefixes, 4 IPv6 prefixes

Prefix	Company	Number of IPs
65.112.0.0/20	CenturyLink Communications, LLC	4,096
67.134.204.0/22	CenturyLink Communications, LLC (CCL-534)	1,024
128.103.0.0/16	Harvard University	65,536
131.142.0.0/16	Smithsonian Astrophysical Observatory	65,536
140.247.0.0/16	Harvard University	65,536
140.247.111.0/24	Harvard University	256
140.247.152.0/24	Harvard University	256
140.247.174.0/24	Harvard University	256
140.247.236.0/24	Harvard University	256
192.5.66.0/24	Harvard University	256
192.54.223.0/24	Harvard University	256
192.131.102.0/24	Harvard University	256
199.94.60.0/22	Harvard University	1,024
2602:fca9::/36	Harvard University	4.95 × 10²⁷
2607:fb60::/32	Harvard University	7.92 × 10²⁸
2607:fb60:2404::/46	Harvard University	4.84 × 10²⁴
2620:32:8000::/48	Smithsonian Astrophysical Observatory	1.21 × 10²⁴

IP ranges are the different blocks of IP addresses advertised by an Autonomous System (AS). These ranges can be used by the same organization operating the AS, or by different organizations.

Peers of AS1742

0 peers

AS1742 has no peers recorded.

Peering is a direct, often free, traffic exchange between Autonomous Systems (ASNs). They share routes only to their own networks and customers, making connections faster and cheaper for that specific traffic, without providing full internet access to each other.

Upstreams of AS1742

5 upstreams

AS174 AS3356 AS10578 AS11164 AS11537

AS1742 uses these Autonomous Systems as its upstreams.

An upstream (or transit provider) is another AS that AS1742 pays for full internet connectivity, allowing it to reach all global destinations and be reachable by them.

Downstreams of AS1742

2 downstreams

AS13315 AS40127

AS1742 provides internet connectivity to these downstream Autonomous Systems.

A downstream is a customer Autonomous System that pays another AS (its provider) for internet access. The provider AS carries the downstream's traffic and makes its network reachable.