AS402491 Certus

AS-CERTUS - Certus · registered in the United States

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in United States#12,899largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#60,064of 79,396 networks with IPv4

IPv64,096 x /481 prefixes

CountryUnited States18,679 ASNs registered there

Open AS402491 in ASN lookup Look up an IP in this network (23.158.28.1) All networks in United States

IPv4 prefixes

All 1 prefix, in address order.

23.158.28.0/24

IPv6 prefixes

All 1 prefix.

2602:f3cb::/36

Similar-sized networks in United States

ASNNameIPv4 addresses

AS401779#12896 AAROBAND - AaroBand, Inc.256

AS401978#12897 INTREPID-NETWORK-GROUP - Intrepid Network Group256

AS402019#12898 JEROME-COUNTY-ID - Jerome County Idaho256

AS402566#12900 MODERN-CONNECTIVITY - Modern256

AS402668#12901 ONE-FREE-COMPUTER-TRANSIT - One256

AS402691#12902 SEL01 - Solar256

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