AS20· US— University of Rochester

Selected local snapshot coverage; not the whole Internet. BGP snapshots: ris-rrc00 11 Oct 08:00 UTC; routeviews2 11 Oct 10:00 UTC; routeviews6 11 Oct 10:00 UTC. Validator: 11 Oct 11:44 UTC. Publication-point issues: 88

Observed originated prefixes

These are observed BGP origins, not an inventory of registered allocations or transit reachability.

0 matching prefix–origin pairs. Each pair appears once; source observations are in Details.

No matching route was observed in the available dataset.

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AS connectivity

3 observed neighbors · 4 direct networks including inferred relationships (excludes this AS).

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4 matching networks · 1–4 shown

Network	Relationship to AS20	IPv4/IPv6	Evidence
AS174 · US Cogent Communications, LLC	v4: upstream / v6: upstream	IPv4, IPv6	Observed + inferred IPv6 · upstream · CAIDA 2026-10-01 · ris-rrc00 11 Oct 08:00 UTC IPv4 · upstream · CAIDA 2026-10-01 · ris-rrc00 11 Oct 08:00 UTC
AS3356 · US Level 3 Parent, LLC	v4: upstream / v6: upstream	IPv4, IPv6	Observed + inferred IPv6 · upstream · CAIDA 2026-10-01 · No BGP observation IPv4 · upstream · CAIDA 2026-10-01 · routeviews2 11 Oct 10:00 UTC
AS3630 · US NYSERNET-BLK - NYSERNet	v4: upstream / v6: upstream	IPv4, IPv6	Inferred IPv4 · upstream · CAIDA 2026-10-01 · No BGP observation IPv6 · upstream · CAIDA 2026-10-01 · No BGP observation
AS3754 · US NYSERNET3-AS - NYSERNet	v4: upstream / v6: upstream	IPv4, IPv6	Observed + inferred IPv6 · upstream · CAIDA 2026-10-01 · routeviews6 11 Oct 10:00 UTC IPv4 · upstream · CAIDA 2026-10-01 · No BGP observation

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Peering & locations

Registry information

ARIN · fetched 10 Oct 21:05 UTC

Resource name

UR

Handle

AS20

RDAP country

Not supplied

ASN

20

Registered organizations

• University of Rochester

Last Changed: 01 Oct 2019 16:57 UTC

Registration: 27 Jul 1984 04:00 UTC

Registry source

Allocation statistics

NRO/RIR delegated-extended records describe allocation or assignment ranges. They do not prove a BGP announcement or replace more-specific RDAP registration information. Country is the allocation record’s registration country, not the physical location of every address.

• AS20–AS20 · arin · assigned · ASN allocation country: US · Allocation date: 1984-07-27 — NRO/RIR data · snapshot 10 Oct 00:00 UTC

NRO data and format

Prefix count history

Local observation changes

Only comparable successful snapshots are compared. First imports, changed peer coverage and collection gaps are baselines, not new global routes or withdrawals. RPKI transition history is not available before it has been recorded.

No retained changes are available for this resource.