Home Prefix Lookup204.152.100.0/22

204.152.100.0/22 - Online Computer Library Center (AS4373)

IPv4ARINallocatedAS4373OCLC-AS - Online Computer Library CenterNo ROA

CIDR

204.152.100.0/22

IP Version

IPv4

Addresses

Mask

/22 (255.255.252.0)

Country

🇺🇸 United States

City

Dublin

RIR

ARIN

Status

allocated

Allocated

1995-01-20

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

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Prefix	Origin AS	RPKI	IRR	Last Seen
204.152.100.0/22	AS4373 OCLC-AS - Online Computer Library Center	No ROA	ARIN	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS4373	ARIN	MNT-OCLC-Z	2023-07-27

Transfer History

Registry transfers of 204.152.100.0/22, blocks inside it, or blocks containing it.

204.152.100.0/22M&A · 2021-07-08
The Research Libraries Group, Inc.
🇺🇸 US ARIN
→
OCLC, Inc.
🇺🇸 US ARIN

Date	Resource	From	To	Type
2021-07-08	204.152.100.0/22	The Research Libraries Group, Inc. 🇺🇸 US ARIN	OCLC, Inc. 🇺🇸 US ARIN	M&A

Origin ASN

AS4373

OCLC-AS - Online Computer Library Center

Related Prefixes

More prefixes of AS4373

All prefixes of AS4373 →

Geolocation

Country🇺🇸United StatesUS

RegionOhio

CityDublin

Coordinates40.1026, -83.1270 ↗

Learn more

RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
RPKI validatorCheck ROA coverage for any prefix or ASN
What is BGP?How prefixes are announced and routed
More-specific prefixesGlossary: covering and more-specific routes
IPv4 transfers in the ARIN regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/204.152.100.0/22

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/204.152.100.0/22" | jq

External Links

RIPEstat