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	Prefix	Description
	204.235.123.0/24	Alarm Detection Systems, Inc

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS3356	Lumen (Level 3)	✔	✘
	AS33652	Comcast Cable Communications, LLC	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS3356	Lumen (Level 3)	✔	✘
	AS33652	Comcast Cable Communications, LLC	✔	✘

ASHandle:       AS398403
OrgID:          ALARM-4
ASName:         SSI
ASNumber:       398403
RegDate:        2020-05-19
Updated:        2020-05-19
Source:         ARIN



OrgID:          ALARM-4
OrgName:        Alarm Detection Systems, Inc
CanAllocate:    
Street:         1111 Church Rd
City:           Aurora
State/Prov:     IL
Country:        US
PostalCode:     60505
RegDate:        2008-09-22
Updated:        2024-11-25
OrgAdminHandle: MSC204-ARIN
OrgTechHandle:  MSC204-ARIN
OrgAbuseHandle: MSC204-ARIN
OrgNOCHandle:   MSC204-ARIN
Source:         ARIN





OrgAdminHandle:       MSC204-ARIN
OrgAdminName:         Mark Schramm
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        MSC204-ARIN
OrgTechName:          Mark Schramm
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       MSC204-ARIN
OrgAbuseName:         Mark Schramm
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         MSC204-ARIN
OrgNOCName:           Mark Schramm
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-06-14T03:25:28Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
LEVEL3	as-lumen-customers-asns	10695
RADB	as-comcast-edia	2774