HomePrefix Lookup163.251.121.0/24

163.251.121.0/24

🇯🇵
IPv4ARINannouncedAS619DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD)No ROA
CIDR
163.251.121.0/24
IP Version
IPv4
Addresses
256
Mask
/24 (255.255.255.0)
Country
🇯🇵 Japan
City
Chiyoda City
RIR
ARIN
Status
announced
Allocated
-

Announced BGP Routes

1 of 1 route
RPKI:
IRR:
PrefixOrigin ASRPKIIRRLast Seen
163.251.121.0/24AS619DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD)No ROA—6/1/2026
Origin ASN
AS619
DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD)
Geolocation
Country🇯🇵JapanJP
RegionTokyo
CityChiyoda City
Coordinates35.6940, 139.7540 ↗
API
Open
GEThttps://api.ipctl.io/v1/prefix/163.251.121.0/24

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

curl -s "https://api.ipctl.io/v1/prefix/163.251.121.0/24" | jq
External Links
RIPEstat Hurricane Electric BGP