157.104.0.0/13

🇯🇵

IPv4RIPEassignedNo ROA

CIDR

157.104.0.0/13

IP Version

IPv4

Addresses

524.2K

Mask

/13 (255.248.0.0)

Country

🇯🇵 Japan

City

Chiyoda

RIR

RIPE

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.

8 less-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
157.105.0.0/16	AS2907SINET-AS - Research Organization of Information and Systems, National Institute of Informatics	No ROA	—	6/15/2026
157.111.0.0/16	AS2907SINET-AS - Research Organization of Information and Systems, National Institute of Informatics	No ROA	—	6/15/2026
157.107.0.0/16	AS4685ASAHI-NET - Asahi Net	Valid	—	6/15/2026
157.110.0.0/16	AS37910CUNET - Chubu University	No ROA	—	6/15/2026
157.109.0.0/16	AS37919SEGASAMMY - SEGA SAMMY HOLDINGS INC.	No ROA	—	6/15/2026
157.111.0.0/20	AS2907SINET-AS - Research Organization of Information and Systems, National Institute of Informatics	No ROA	—	6/15/2026
157.109.160.0/22	AS37919SEGASAMMY - SEGA SAMMY HOLDINGS INC.	No ROA	—	6/15/2026
157.111.16.0/24	AS2907SINET-AS - Research Organization of Information and Systems, National Institute of Informatics	No ROA	—	6/15/2026

Prefix	AS	Country	Status
157.107.0.0/16	AS4685	🇯🇵JP	allocated
157.110.0.0/16	AS37910	🇯🇵JP	allocated
157.109.0.0/16	AS37919	🇯🇵JP	allocated
157.104.0.0/16		🇯🇵JP	allocated
157.105.0.0/16	AS2907	🇯🇵JP	allocated
157.106.0.0/16		🇯🇵JP	allocated
157.111.0.0/16	AS2907	🇯🇵JP	allocated
157.108.0.0/16		🇯🇵JP	allocated

Geolocation

Country🇯🇵JapanJP

RegionTokyo

CityChiyoda

API

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

curl -s "https://api.ipctl.io/v1/prefix/157.104.0.0/13" | jq

External Links