AS18121 is the autonomous system of Ishikawa Computer Center Co.,LTD.. It holds 22,528 IPv4 addresses in 10 prefixes plus 1 IPv6 ranges, mainly in 
Japan.
By IPv4 addresses the network ranks #5,758 worldwide and #247 of 848 networks in Japan. That is 0.01% of the country’s IPv4 space.
The largest block is 202.222.32.0 to 202.222.63.255 with 8,192 addresses, geolocated to Chiyoda City.
- IPv4 addresses
- 22,528
- IPv4 prefixes
- 10
- World rank
- #5,758
- Country share
- 0.01%
- IPv6 ranges
- 1
Addresses by country
- Japan 100%
Largest blocks
- 202.222.32.0 Chiyoda City8,192
- 219.121.224.0 Chiyoda City6,400
- 180.94.192.0 Kanazawa (1 Chome)6,144
- 219.121.250.0 Chiyoda City1,280
- 103.241.208.0 Fukui-shi512
Networks of similar size
- AS216374 Hardanger Breiband AS
22,528 - AS210906 UAB "Bite Lietuva"
22,528 - AS23778 IMIZU CABLE NETWORK CO.,LTD.22,528
- AS131923 Mihara Cable Television Ltd.22,528
- AS22908 Sixsigma Networks Mexico, S.A. de C.V.
22,528 - AS27653 Alpha Communications Network
22,528 - AS28271 DataCorpore Serviços e Representações
22,528 - AS34150 JSC "ER-Telecom Holding"
22,272
IPv4 prefixes
Questions and answers
Who owns AS18121?
Autonomous system AS18121 is operated by Ishikawa Computer Center Co.,LTD..
How many IP addresses does AS18121 have?
The network holds 22,528 IPv4 addresses in 10 prefixes, plus 1 IPv6 ranges.
Which country is AS18121 in?
The main country is Japan.
How big is AS18121?
By IPv4 addresses it ranks #5,758 worldwide.
What is the largest address block of AS18121?
202.222.32.0 to 202.222.63.255, 8,192 addresses.