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	Prefix	Description
	170.153.96.0/22	Ceridian Employer Services
	170.153.97.0/24	Ceridian Employer Services
	170.153.98.0/24	Ceridian Employer Services
	170.153.140.0/22	Ceridian Employer Services
	170.153.141.0/24	Ceridian Employer Services
	170.153.142.0/24	Ceridian Employer Services
	170.153.144.0/24	Ceridian Employer Services

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✘
	AS6461	Zayo Bandwidth	✔	✘
	AS13335	Cloudflare, Inc.	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS6461	Zayo Bandwidth	✔	✘
	AS174	Cogent Communications, LLC	✔	✘
	AS13335	Cloudflare, Inc.	✔	✘
	AS1239	Sprint Wireline (Cogent)	✔	✘

ASHandle:       AS21787
OrgID:          CERIDI-3
ASName:         CERIDIAN
ASNumber:       21787
RegDate:        2001-06-20
Updated:        2012-10-17
Source:         ARIN



OrgID:          CERIDI-3
OrgName:        CERIDIAN
CanAllocate:    
Street:         300 EMBASSY ROW
City:           ATLANTA
State/Prov:     GA
Country:        US
PostalCode:     30328
RegDate:        2001-06-20
Updated:        2012-10-17
OrgAdminHandle: CKN23-ARIN
OrgTechHandle:  CKN23-ARIN
OrgAbuseHandle: CKN23-ARIN
Source:         ARIN





OrgAdminHandle:       CKN23-ARIN
OrgAdminName:         Contact No
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        CKN23-ARIN
OrgTechName:          Contact No
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       CKN23-ARIN
OrgAbuseName:         Contact No
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2025-12-24T03:28:57Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
ARIN	as-xo-b	58180
AFRINIC	as-30999	24
ARIN	as-xo	1
LEVEL3	as-level3-origins-na	0
AFRINIC	as-lyca	30
ARIN	as13335:as-customers	1505
RIPE	as-lyca	30
LEVEL3	as-sprint-origins	7309
RADB	as-telstra-testing-1	11766
LEVEL3	as-sprint-customers	1756
RADB	as-telstra-intl-customers	11860