AS1742

Summary

Country	United States
Organization	Harvard University
Domain	harvard.edu
Number of IPv4	204,864
Number of IPv6	8.4491× 1028
AS Type	Education
Registry	ARIN
Allocated	February 19, 1992 (about 32 years ago)
Updated	December 21, 2023 (about 4 months ago)

IP Ranges

AS1742 announces 15 IPv4 ranges and 4 IPv6 ranges.

That's a total of 204,864 IPv4 addresses and 8.4491× 10²⁸ IPv6 addresses.

Prefix	Organization	Size	Registry	Status
65.112.0.0/20	Centurylink Communications, LLC	4,096	ARIN	ALLOCATION
67.134.204.0/22	Centurylink Communications, LLC	1,024	ARIN	ALLOCATION
128.103.0.0/16	Harvard University	65,536	ARIN	ALLOCATION
131.142.0.0/16	Smithsonian Astrophysical Observatory	65,536	ARIN	ALLOCATION
140.247.0.0/16	Harvard University	65,536	ARIN	ALLOCATION
140.247.111.0/24	Harvard University	256	ARIN	ALLOCATION
140.247.152.0/24	Harvard University	256	ARIN	ALLOCATION
140.247.174.0/24	Harvard University	256	ARIN	ALLOCATION
140.247.179.128/26	Harvard University	64	ARIN	ALLOCATION
140.247.236.0/24	Harvard University	256	ARIN	ALLOCATION
192.5.66.0/24	Harvard University	256	ARIN	ALLOCATION
192.43.216.0/24	Harvard University	256	ARIN	ALLOCATION
192.54.223.0/24	Harvard University	256	ARIN	ALLOCATION
192.131.102.0/24	Harvard University	256	ARIN	ALLOCATION
199.94.60.0/22	Harvard University	1,024	ARIN	REASSIGNMENT

Prefix	Organization	Size	Registry	Status
2602:fca9::/36	Harvard University	4.9518× 1027	ARIN	ALLOCATION
2607:fb60::/32	Harvard University	7.9228× 1028	ARIN	ALLOCATION
2607:fb60:2400::/40	Harvard University	3.0949× 1026	ARIN	ALLOCATION
2620:32:8000::/48	Smithsonian Astrophysical Observatory	1.2089× 1024	ARIN	ALLOCATION

Peers

There are 1 peer for AS1742:

Upstreams

There are 5 upstreams for AS1742:

Downstreams

There are 2 downstreams for AS1742: