AS18558 Riverside County Office of Education

NETBLK-RCOEK - Riverside County Office of Education · registered in the United States

IPv4 addresses72,204125 prefixes · 0.002% of announced IPv4

Rank in United States#778largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#2,375of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)5 prefixes

CountryUnited States18,679 ASNs registered there

Open AS18558 in ASN lookup Look up an IP in this network (137.164.1.111) All networks in United States

IPv4 prefixes

All 125 prefixes, in address order.

137.164.1.110/31
137.164.1.236/30
137.164.3.16/31
137.164.13.36/30
198.188.95.0/24
204.26.32.0/20
204.26.48.0/21
204.26.56.0/24
204.100.0.0/19
204.100.32.0/22
204.100.36.0/24
204.100.37.0/29
204.100.37.8/29
204.100.37.16/28
204.100.37.32/27
204.100.37.64/26
204.100.37.128/25
204.100.38.0/23
204.100.40.0/22
204.100.44.0/23
204.100.46.0/23
204.100.48.0/21
204.100.56.0/24
204.100.57.0/24
204.100.58.0/23
204.100.60.0/22
204.100.64.0/29
204.100.64.8/31
204.100.64.10/31
204.100.64.12/30
204.100.64.16/28
204.100.64.32/27
204.100.64.64/26
204.100.64.128/25
204.100.65.0/24
204.100.66.0/23
204.100.68.0/22
204.100.72.0/21
204.100.80.0/23
204.100.82.0/24
204.100.83.0/24
204.100.84.0/25
204.100.84.128/26
204.100.84.192/26
204.100.85.0/24
204.100.86.0/23
204.100.88.0/22
204.100.92.0/23
204.100.94.0/24
204.100.95.0/24
204.100.96.0/22
204.100.100.0/22
204.100.104.0/23
204.100.106.0/23
204.100.108.0/22
204.100.112.0/20
204.100.128.0/22
204.100.132.0/23
204.100.134.0/24
204.100.135.0/24
204.100.136.0/22
204.100.140.0/22
204.100.144.0/20
204.100.160.0/21
204.100.168.0/24
204.100.169.0/26
204.100.169.64/29
204.100.169.72/29
204.100.169.80/28
204.100.169.96/27
204.100.169.128/25
204.100.170.0/23
204.100.172.0/22
204.100.176.0/20
204.100.192.0/23
204.100.194.0/24
204.100.195.0/24
204.100.196.0/22
204.100.200.0/21
204.100.208.0/22
204.100.212.0/23
204.100.214.0/24
204.100.215.0/24
204.100.216.0/22
204.100.220.0/24
204.100.221.0/24
204.100.222.0/23
204.100.224.0/20
204.100.240.0/22
204.100.244.0/25
204.100.244.128/26
204.100.244.192/27
204.100.244.224/28
204.100.244.240/29
204.100.244.248/29
204.100.245.0/24
204.100.246.0/23
204.100.248.0/23
204.100.250.0/26
204.100.250.64/27
204.100.250.96/27
204.100.250.128/25
204.100.251.0/25
204.100.251.128/26
204.100.251.192/27
204.100.251.224/28
204.100.251.240/28
204.100.252.0/26
204.100.252.64/26
204.100.252.128/25
204.100.253.0/24
204.100.254.0/25
204.100.254.128/26
204.100.254.192/28
204.100.254.208/28
204.100.254.224/27
204.100.255.0/31
204.100.255.2/32
204.100.255.3/32
204.100.255.4/30
204.100.255.8/29
204.100.255.16/28
204.100.255.32/27
204.100.255.64/26
204.100.255.128/25

IPv6 prefixes

All 5 prefixes.

2607:f380::118:9a40:16e0/123
2607:f380::118:9a40:1ec0/122
2607:f380::118:9a40:d240/122
2607:f380:1::118:9a40:3100/123
2607:f708::/32

Similar-sized networks in United States

ASNNameIPv4 addresses

AS63410#775 PRIVATESYSTEMS - PrivateSystems Networks72,448

AS5374#776 DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD)72,448

AS14454#777 SILVERSKY-INC - SilverSky, Inc.72,448

AS7960#779 CALPOLY-NET-ENS - California Polytechnic State University72,204

AS14127#780 ILAND - Iland Internet Solutions Corporation72,192

AS396465#781 SACSTATE - California State University, Sacramento71,789

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources