ASN Lookup Tool

CERIDIAN US US 7 Routes

AS Data

AS21787

AS21787 – CERIDIAN

AS Number 21787
AS Name CERIDIAN
Organization CERIDIAN(ceridi-3)
Country US
Number of IPv4 Routes 7
Number of IPv6 Routes 0
ASN type BUSINESS
Registry ARIN
Date Allocated 2001-06-20

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Use ASN data for AS21787 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
170.153.96.0/22 1024
170.153.140.0/22 1024
170.153.141.0/24 256
170.153.142.0/24 256
170.153.144.0/24 256
170.153.97.0/24 256
170.153.98.0/24 256

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       21787
ASName:         CERIDIAN
ASHandle:       AS21787
RegDate:        2001-06-20
Updated:        2012-10-17    
Ref:            https://rdap.arin.net/registry/autnum/21787


OrgName:        CERIDIAN
OrgId:          CERIDI-3
Address:        300 EMBASSY ROW
City:           ATLANTA
StateProv:      GA
PostalCode:     30328
Country:        US
RegDate:        2001-06-20
Updated:        2012-10-17
Ref:            https://rdap.arin.net/registry/entity/CERIDI-3


OrgAbuseHandle: CKN23-ARIN
OrgAbuseName:   No, Contact Known
OrgAbusePhone:  +1-800-555-1234 
OrgAbuseEmail:  nobody@example.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CKN23-ARIN

OrgTechHandle: CKN23-ARIN
OrgTechName:   No, Contact Known
OrgTechPhone:  +1-800-555-1234 
OrgTechEmail:  nobody@example.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CKN23-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number Description Country
AS13335 Cloudflare, Inc. US
AS1239 Cogent Communications, LLC US
AS6461 Zayo Bandwidth US
AS174 Cogent Communications, LLC US

Upstreams

AS Number Description Country
AS13335 Cloudflare, Inc. US
AS6461 Zayo Bandwidth US
AS174 Cogent Communications, LLC US

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Frequently Asked Questions

ASN AS21787 is an Autonomous System Number used to identify a network for BGP internet routing.
AS21787 is listed under CERIDIAN.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.