AS21787 CERIDIAN

CERIDIAN - CERIDIAN · registered in the United States

IPv4 addresses2,3043 prefixes · <0.001% of announced IPv4

Rank in United States#5,897largest network in US by IPv4 space, of 18,338 · <0.01% of US

Rank worldwide#20,891of 79,396 networks with IPv4

IPv6noneno IPv6 routes announced

CountryUnited States18,679 ASNs registered there

Open AS21787 in ASN lookup Look up an IP in this network (170.153.96.1) All networks in United States

IPv4 prefixes

All 3 prefixes, in address order.

170.153.96.0/22
170.153.140.0/22
170.153.144.0/24

Similar-sized networks in United States

ASNNameIPv4 addresses

AS20314#5894 ISP-ROUTER - Conagra Brands Inc.2,304

AS20404#5895 AS20404 - NRG Energy, Inc.2,304

AS20460#5896 MYTHOSTECH - TFB NET2,304

AS21874#5898 MMC - MMC2,304

AS22184#5899 IRIDIUM-SATELLITE - IRIDIUM SATELLITE,LLC2,304

AS22213#5900 SALK-AS - Salk Institute2,304

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