Home Prefix Lookup204.197.0.0/17

204.197.0.0/17 - University Of Maine System (AS557)

IPv4ARINallocatedAS557UMAINE-SYS-AS - University of Maine System RPKI Valid

CIDR

204.197.0.0/17

IP Version

IPv4

Addresses

32.7K

Mask

/17 (255.255.128.0)

Country

🇺🇸 United States

City

Orono

RIR

ARIN

Status

allocated

Allocated

2009-08-04

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
204.197.0.0/17	AS557 UMAINE-SYS-AS - University of Maine System	Valid	ARIN	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
204.197.0.0/17	AS557	/24	arin
204.197.0.0/17	AS198949	/24	arin

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS557	ARIN	MNT-ME	2026-09-08
AS198949	Other IRR	MAINT-AS198949	2024-07-01

Origin ASN

AS557

UMAINE-SYS-AS - University of Maine System

Related Prefixes

More prefixes of AS557

All prefixes of AS557 →

Geolocation

Country🇺🇸United StatesUS

RegionMaine

CityOrono

Coordinates44.9020, -68.6667 ↗

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/204.197.0.0/17

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

curl -s "https://api.ipctl.io/v1/prefix/204.197.0.0/17" | jq

External Links

RIPEstat