AS398324 Censys, Inc.

CENSYS-ARIN-01 - Censys, Inc. · registered in the United States

IPv4 addresses4,35217 prefixes · <0.001% of announced IPv4

Rank in United States#4,387largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#14,657of 79,396 networks with IPv4

IPv67 x /484 prefixes

CountryUnited States18,679 ASNs registered there

Open AS398324 in ASN lookup Look up an IP in this network (66.132.148.1) All networks in United States

IPv4 prefixes

All 17 prefixes, in address order.

66.132.148.0/24
66.132.153.0/24
66.132.159.0/24
66.132.172.0/24
66.132.175.0/24
66.132.180.0/24
66.132.186.0/24
66.132.195.0/24
66.132.198.0/24
66.132.209.0/24
66.132.224.0/24
66.132.228.0/24
66.234.1.0/24
162.142.125.0/24
167.94.138.0/24
167.248.133.0/24
206.168.35.0/24

IPv6 prefixes

All 4 prefixes.

2602:80d:1000::/47
2602:80d:1006::/47
2602:80d:1008::/47
2602:80d:100a::/48

Other ASNs named Censys, Inc.

1 other network uses the same organisation name; together with AS398324 they announce 4,864 IPv4 addresses.

ASNNameIPv4 addresses

AS398705CENSYS-ARIN-02 - Censys, Inc. US512

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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