AS77

Summary

Country	United States
Organization	Johns Hopkins University Applied Physics Laboratory
Domain	jhuapl.edu
Number of IPv4	68,352
Number of IPv6	1.2089× 1024
AS Type	Education
Registry	ARIN
Allocated	May 05, 1986 (about 39 years ago)
Updated	February 24, 2012 (about 13 years ago)

IP Ranges

AS77 announces 5 IPv4 ranges and 1 IPv6 range.

That's a total of 68,352 IPv4 addresses and 1.2089× 10²⁴ IPv6 addresses.

Prefix	Organization	Size	Registry	Status
128.244.0.0/16	Johns Hopkins University Applied Physics Laboratory	65,536	ARIN	ALLOCATION
204.9.128.0/24	Johns Hopkins University Applied Physics Laboratory	256	ARIN	ALLOCATION
204.9.128.0/21	Johns Hopkins University Applied Physics Laboratory	2,048	ARIN	ALLOCATION
204.9.129.0/24	Johns Hopkins University Applied Physics Laboratory	256	ARIN	ALLOCATION
204.9.130.0/24	Johns Hopkins University Applied Physics Laboratory	256	ARIN	ALLOCATION

Prefix	Organization	Size	Registry	Status
2620:0:320::/48	Johns Hopkins University Applied Physics Laboratory	1.2089× 1024	ARIN	ALLOCATION

Peers

AS77 actively fosters the following peering relationships that enhance network performance through direct, settlement-free traffic exchange. Even with a modest number of peers, each connection serves as a strategic asset—optimizing routing, reducing latency, and minimizing transit costs.

Upstreams

AS77 connects to the global Internet via at least 3 upstream providers. In this setup, AS77 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.

Downstreams

AS77 currently has no downstream networks, meaning it does not serve as a transit provider to customer networks.