Home Prefix Lookup218.251.0.0/17

218.251.0.0/17 - OPTAGE (AS17511)

IPv4APNICallocatedAS17511OPTAGE OPTAGE Inc. RPKI Valid

CIDR

218.251.0.0/17

IP Version

IPv4

Addresses

32.7K

Mask

/17 (255.255.128.0)

Country

🇯🇵 Japan

City

Osaka

RIR

APNIC

Status

allocated

Allocated

2003-10-02

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
218.251.0.0/17	AS17511 OPTAGE OPTAGE Inc.	Valid	Other IRR	2026-10-11

RPKI ROAs

Prefix	Origin	Max Length	Trust Anchor
218.251.0.0/17	AS17511	/32	apnic

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS17511	Other IRR	MAINT-AS17511	2023-11-13

Origin ASN

AS17511

OPTAGE OPTAGE Inc.

Related Prefixes

More prefixes of AS17511

All prefixes of AS17511 →

Geolocation

Country🇯🇵JapanJP

RegionOsaka

CityOsaka

Coordinates34.6932, 135.4940 ↗

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 APNIC regionWho bought and sold address space recently

API

Open

GEThttps://api.ipctl.io/v1/prefix/218.251.0.0/17

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

curl -s "https://api.ipctl.io/v1/prefix/218.251.0.0/17" | jq

External Links

RIPEstat