218.251.240.0/20

🇯🇵

IPv4APNICassignedNo ROA

CIDR

218.251.240.0/20

IP Version

IPv4

Addresses

Mask

/20 (255.255.240.0)

Country

🇯🇵 Japan

City

Shinjuku (Shinogawamachi)

RIR

APNIC

Status

assigned

Allocated

Announced BGP Routes

0 of 0 routes

RPKI:

IRR:

Prefix	Origin AS	RPKI	IRR	Last Seen
This prefix is not currently announced in BGP. See covering prefix below.

1 less-specific announcement

Prefix	Origin AS	RPKI	IRR	Last Seen
218.251.128.0/17	AS23720RMNI-AS-AP - Rakuten Mobile Network, Inc.	No ROA	—	6/1/2026

Origin	Registry	Maintainer	Modified
AS23720	APNIC	MAINT-RMNI-JP	3/18/2020
AS55395	RADB	MAINT-AS7684	11/13/2023

Geolocation

Country🇯🇵JapanJP

RegionTokyo

CityShinjuku (Shinogawamachi)

API

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

curl -s "https://api.ipctl.io/v1/prefix/218.251.240.0/20" | jq

External Links