AS55

Summary

Country	United States
Organization	University of Pennsylvania
Domain	upenn.edu
Number of IPv4	262,400
Number of IPv6	7.9228× 1028
AS Type	Education
Registry	ARIN
Allocated	December 18, 1985 (about 39 years ago)
Updated	October 14, 2021 (about 3 years ago)

IP Ranges

AS55 announces 5 IPv4 ranges and 1 IPv6 range.

That's a total of 262,400 IPv4 addresses and 7.9228× 10²⁸ IPv6 addresses.

Prefix	Organization	Size	Registry	Status
128.91.0.0/16	University of Pennsylvania	65,536	ARIN	ALLOCATION
130.91.0.0/16	University of Pennsylvania	65,536	ARIN	ALLOCATION
158.130.0.0/16	University of Pennsylvania	65,536	ARIN	ALLOCATION
165.123.0.0/16	University of Pennsylvania	65,536	ARIN	ALLOCATION
192.84.2.0/24	University of Pennsylvania	256	ARIN	ALLOCATION

Prefix	Organization	Size	Registry	Status
2607:f470::/32	University of Pennsylvania	7.9228× 1028	ARIN	ALLOCATION

Peers

AS55 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

AS55 connects to the global Internet via at least 4 upstream providers. In this setup, AS55 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.

Downstreams

AS55 serves as a transit provider the following ASes, delivering the BGP routes needed for global connectivity. This downstream relationship underscores AS55's role in extending Internet access beyond its own infrastructure.