AS55 UPENN - University of Pennsylvania

🇺🇸

ARINassigned

Announced Prefixes (BGP)

6total

5 IPv41 IPv6

IPv4 Addresses

Allocated (RIR)262,400

Announced (BGP)262,400

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)7.9×10²⁸

Prefix Limit (IPv4)

500

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

1985-12-18

Announced Prefixes

(BGP)6

Prefix	RPKI	IRR	Last Seen
128.91.0.0/16	Valid	Other IRR	2026-10-11
130.91.0.0/16	Valid	Other IRR	2026-10-11
158.130.0.0/16	Valid	Other IRR	2026-10-11
165.123.0.0/16	Valid	Other IRR	2026-10-11
192.84.2.0/24	Valid	Other IRR	2026-10-11
2607:f470::/32	Valid	Other IRR	2026-10-11

(RIR)5

Prefix	Country	RIR	Status
128.91.0.0/16	🇺🇸 US	ARIN	allocated
130.91.0.0/16	🇺🇸 US	ARIN	allocated
158.130.0.0/16	🇺🇸 US	ARIN	allocated
165.123.0.0/16	🇺🇸 US	ARIN	allocated
192.84.2.0/24	🇺🇸 US	ARIN	allocated

(seen in AS paths)

Networks AS55 hands its own prefixes to: transit providers, or peers at an exchange.

Networks whose own prefixes AS55 passes on: usually its customers.

ASPA

No ASPA

External Links

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS55 should publish an ASPA object
IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/55" | jq