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	Prefix	Description
	66.186.128.0/20	Lan2Wan, Inc.
	66.186.129.0/24	Lan2Wan, Inc.
	204.152.42.0/24	Management Analsysis, Inc.
	204.152.42.0/23	Management Analsysis, Inc.
	204.152.43.0/24	Management Analsysis, Inc.
	205.147.160.0/19	Sytex Access Ltd.
	207.152.128.0/18	MAI Network Services
	207.152.134.0/24	MAI Network Services
	207.152.135.0/24	MAI Network Services
	209.50.192.0/19	Medical Computer Systems
	209.50.193.0/24	Medical Computer Systems

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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	✔	✘
	AS33657	Comcast Cable Communications, LLC	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications, LLC	✔	✘
	AS33657	Comcast Cable Communications, LLC	✔	✘
	AS1239	Sprint Wireline (Cogent)	✔	✘

ASHandle:       AS11951
OrgID:          MDCS
ASName:         MCSP
ASNumber:       11951
RegDate:        1999-02-12
Updated:        2021-07-14
TechHandle:     PW25-ARIN
AbuseHandle:    PW25-ARIN
NOCHandle:      PW25-ARIN
Source:         ARIN



OrgID:          MDCS
OrgName:        Medical Computer Systems
CanAllocate:    
Street:         1729 21st Street, NW
City:           Washington
State/Prov:     DC
Country:        US
PostalCode:     20009
RegDate:        1997-04-04
Updated:        2011-09-24
OrgAdminHandle: PW25-ARIN
OrgTechHandle:  PW25-ARIN
OrgAbuseHandle: PW25-ARIN
Source:         ARIN





OrgAdminHandle:       PW25-ARIN
OrgAdminName:         Paul Wolotsky
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        PW25-ARIN
OrgTechName:          Paul Wolotsky
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       PW25-ARIN
OrgAbuseName:         Paul Wolotsky
# Email removed, Log into bgp.tools to see whois emails


TechHandle:           PW25-ARIN
TechName:             Paul Wolotsky
# Email removed, Log into bgp.tools to see whois emails


AbuseHandle:          PW25-ARIN
AbuseName:            Paul Wolotsky
# Email removed, Log into bgp.tools to see whois emails


NOCHandle:            PW25-ARIN
NOCName:              Paul Wolotsky
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2025-12-24T03:26:36Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as3491:as-customers-na	60740
RADB	as16631:as-cogc-002	66
RADB	as-yipes	2058
ALTDB	as-amc-test	1805
LEVEL3	as-yipes	2058
ALTDB	as-amc	1822
RADB	as174:as-cogc-002	47
ALTDB	as-inforelay	1658
RADB	as-comcast-edia	2752