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	Prefix	Description
	205.207.104.0/24	Constant Contact, Inc
	205.207.104.0/23	Constant Contact, Inc
	205.207.106.0/23	Constant Contact, Inc
	208.75.120.0/23	Constant Contact, Inc
	208.75.122.0/23	Constant Contact, Inc

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS398427	Markley Network Services, LLC	✔	✘
	AS46887	Crown Castle Fiber LLC	✔	✘
	AS6461	Zayo Bandwidth	✔	✘
	AS33652	Comcast Cable Communications, LLC	✔	✘
	AS3356	Lumen (Level 3)	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS398427	Markley Network Services, LLC	✔	✘
	AS46887	Crown Castle Fiber LLC	✔	✘
	AS6461	Zayo Bandwidth	✔	✘
	AS33652	Comcast Cable Communications, LLC	✔	✘
	AS3356	Lumen (Level 3)	✔	✘

ASHandle:       AS40444
OrgID:          CONST-21
ASName:         ASN-CC
ASNumber:       40444
RegDate:        2007-02-21
Updated:        2007-02-21
TechHandle:     CCO156-ARIN
AbuseHandle:    CCO156-ARIN
NOCHandle:      CCO156-ARIN
Source:         ARIN



OrgID:          CONST-21
OrgName:        Constant Contact, Inc
CanAllocate:    
Street:         1601 Trapelo Road
Street:         Suite 329
City:           Waltham
State/Prov:     MA
Country:        US
PostalCode:     02451
RegDate:        2006-12-19
Updated:        2008-07-03
OrgAdminHandle: CCO156-ARIN
OrgTechHandle:  CCO156-ARIN
OrgAbuseHandle: ABUSE1897-ARIN
OrgNOCHandle:   CCO156-ARIN
Source:         ARIN





OrgAdminHandle:       CCO156-ARIN
OrgAdminName:          Constant Contact Operations
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        CCO156-ARIN
OrgTechName:           Constant Contact Operations
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       ABUSE1897-ARIN
OrgAbuseName:          Constant Contact Abuse
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         CCO156-ARIN
OrgNOCName:            Constant Contact Operations
# Email removed, Log into bgp.tools to see whois emails


TechHandle:           CCO156-ARIN
TechName:              Constant Contact Operations
# Email removed, Log into bgp.tools to see whois emails


AbuseHandle:          CCO156-ARIN
AbuseName:             Constant Contact Operations
# Email removed, Log into bgp.tools to see whois emails


NOCHandle:            CCO156-ARIN
NOCName:               Constant Contact Operations
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-05-07T03:38:20Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
ARIN	as13335:as-customers	1588
RADB	as-comcast-edia	2766
RADB	as-ccf	1529
LEVEL3	as-level3-origins-na	0
LEVEL3	as-lumen-customers-asns	10695
RADB	as-ccf-test	1461
ARIN	as-xo	1
ALTDB	as-eigi-sc-customers	16
ALTDB	as-nf-sc-customers	13
ARIN	as-markleyns:as-markleyns-low	5
APNIC	as-set-bsccl	2095
ARIN	as-xo-b	58836
RADB	as-pnaplax	300
RADB	as-telstra-testing-1	11846
RADB	as198949:as-sd	3446