AS159· US— Ohio State University

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OSUNET-AS · ARIN · US

Identity source

AS159 ·

US Ohio State University

NRO allocation data

7IPv4 prefixes

1IPv6 prefixes

1Observed neighbors

RPKIValid: 0 Invalid: 0 Not found: 8 Unknown: 0

Selected local snapshot coverage; not the whole Internet. BGP snapshots: ris-rrc00 11 Oct 08:00 UTC; routeviews2 11 Oct 08:00 UTC; routeviews6 11 Oct 08:00 UTC. Validator: 11 Oct 10:12 UTC. Publication-point issues: 89

Address space details

Overlapping originated prefixes counted once. IPv4 addresses: 198,400

IPv6 addresses: 1208925819614629174706176

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Observed originated prefixes

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

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

Prefix	RPKI	Last observed	Details
128.146.0.0/16	Not Found	11 Oct 08:00 UTC	2 source observations ris-rrc00 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found routeviews2 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found
140.254.0.0/16	Not Found	11 Oct 08:00 UTC	2 source observations ris-rrc00 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found routeviews2 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found
164.107.0.0/16	Not Found	11 Oct 08:00 UTC	2 source observations ris-rrc00 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found routeviews2 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found
192.12.205.0/24	Not Found	11 Oct 08:00 UTC	2 source observations ris-rrc00 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found routeviews2 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found
192.68.143.0/24	Not Found	11 Oct 08:00 UTC	2 source observations ris-rrc00 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found routeviews2 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found
192.153.26.0/24	Not Found	11 Oct 08:00 UTC	2 source observations ris-rrc00 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found routeviews2 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found
198.30.200.0/22	Not Found	11 Oct 08:00 UTC	2 source observations ris-rrc00 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found routeviews2 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found
2620:0:1a10::/48	Not Found	11 Oct 08:00 UTC	2 source observations ris-rrc00 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found routeviews6 · 2026-10-11T08:00:00+00:00 · 1 selected peers · RPKI not_found

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AS connectivity

1 unique neighbors in the selected local snapshots. This is the available collector dataset, not a complete map of the Internet. Adjacency does not establish upstream service or peering.

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Network list

Sources & methodology

Inferred topology and tier estimates do not establish commercial agreements. AS hops count AS relationships, not routers or observed traffic paths. Arrows run from provider to customer; peer links have no arrows. Cross-links connect other included networks. IPv4 relationships guide the All layout; IPv6 differences remain in connection details. Cyclic relationships are marked separately. Size uses the global, logarithmic IPv4 CAIDA customer cone including the AS itself; IPv6 size data is unavailable.

1 matching neighbors · 1–1 shown

Network	IPv4/IPv6	Seen in	Last observed	Details
AS600 · US OARnet	IPv4, IPv6	ris-rrc00, routeviews2, routeviews6	11 Oct 08:00 UTC	Source observations ris-rrc00 · IPv4 · 11 Oct 08:00 UTC routeviews2 · IPv4 · 11 Oct 08:00 UTC ris-rrc00 · IPv6 · 11 Oct 08:00 UTC routeviews6 · IPv6 · 11 Oct 08:00 UTC

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Peering & locations

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Registry information

ARIN · fetched 11 Oct 05:27 UTC

Resource name: OSUNET-AS
Handle: AS159
RDAP country: Not supplied
ASN: 159

Registered organizations

Ohio State University

Last Changed: 02 Feb 2023 23:47 UTC

Registration: 19 Feb 1988 05:00 UTC

Registry contacts and maintainers

NAC29-ARIN · abuse
ZT31-ARIN · noc, technical

Official registry record

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.

AS159–AS159 · arin · assigned · ASN allocation country: US · Allocation date: 1988-02-19 — 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.

Retained local prefix-count observations

Separate collector series. Missing rows are not zero. Peer-set changes are separate coverage, not a continuous trend.

Source	Snapshot	Family	Prefixes	Peer coverage
routeviews6	11 Oct 08:00 UTC	IPv6	1	2406:840:feed:2::1/IPv6
ris-rrc00	11 Oct 08:00 UTC	IPv4	7	2a00:5884::6/IPv6, 89.234.186.6/IPv4
ris-rrc00	11 Oct 08:00 UTC	IPv6	1	2a00:5884::6/IPv6, 89.234.186.6/IPv4
routeviews2	11 Oct 08:00 UTC	IPv4	7	140.192.8.16/IPv4
routeviews2	11 Oct 06:00 UTC	IPv4	7	140.192.8.16/IPv4
routeviews6	11 Oct 06:00 UTC	IPv6	1	2406:840:feed:2::1/IPv6
ris-rrc00	11 Oct 00:00 UTC	IPv4	7	2a00:5884::6/IPv6, 89.234.186.6/IPv4
ris-rrc00	11 Oct 00:00 UTC	IPv6	1	2a00:5884::6/IPv6, 89.234.186.6/IPv4