AS20 UR - University of Rochester

🇺🇸

ARINassigned

Announced Prefixes (BGP)

4total

3 IPv41 IPv6

IPv4 Addresses

Allocated (RIR)66,304

Announced (BGP)66,048

IPv6 Addresses

Allocated (RIR)3×10²⁶

Announced (BGP)3×10²⁶

Prefix Limit (IPv4)

100

Prefix Limit (IPv6)

Country

RIR

Status

assigned

Allocated

1984-07-27

Announced Prefixes

(BGP)4

Prefix	RPKI	IRR	Last Seen
128.151.0.0/16	Valid	ARIN	2026-10-11
192.5.53.0/24	Valid	ARIN	2026-10-11
199.89.214.0/24	Valid	ARINOther IRR	2026-10-11
2620:107:a000::/40	Valid	ARINOther IRR	2026-10-11

(RIR)5

Prefix	Country	RIR	Status
128.151.0.0/16	🇺🇸 US	ARIN	allocated
192.5.53.0/24	🇺🇸 US	ARIN	allocated
192.12.27.0/24	🇺🇸 US	ARIN	allocated
199.89.214.0/24	🇺🇸 US	ARIN	allocated
2620:107:a000::/40	🇺🇸 US	ARIN	allocated

(seen in AS paths)

Networks AS20 hands its own prefixes to: transit providers, or peers at an exchange.

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 AS20 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/20" | jq