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	Prefix	Description
	64.129.37.0/24	Level 3 Parent, LLC
	74.203.183.0/24	Ribbon Communications Operating Company, Inc.
	97.65.224.0/24	Ribbon Communications Operating Company, Inc.
	147.234.170.0/24	Ribbon Communications Operating Company, Inc.
	147.234.175.0/24	Ribbon Communications Operating Company, Inc.
	216.110.2.0/24	Ribbon Communications Operating Company, Inc.
	63.149.188.0/24	Ribbon Communications Operating Company, Inc.

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS3257	GTT Communications Inc.	✔	✘
	AS46887	Crown Castle Fiber LLC	✔	✘
	AS56175	198 Yishun Ave 9	✔	✘
	AS45820	Tata Teleservices ISP	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS3257	GTT Communications Inc.	✔	✘
	AS56175	198 Yishun Ave 9	✔	✘
	AS46887	Crown Castle Fiber LLC	✔	✘
	AS45820	Tata Teleservices ISP	✔	✘
	AS8928	GTT Communications Inc.	✔	✘

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Downstreams

	ASN	Description	IPv4	IPv6
	AS56175	198 Yishun Ave 9	✔	✘

ASHandle:       AS5777
OrgID:          RCO-22
ASName:         RIBBON
ASNumber:       5777
RegDate:        2009-10-05
Updated:        2020-08-04
Source:         ARIN



OrgID:          RCO-22
OrgName:        Ribbon Communications Operating Company, Inc.
CanAllocate:    
Street:         4 Technology Park Drive
City:           Westford
State/Prov:     MA
Country:        US
PostalCode:     01886
RegDate:        2020-06-17
Updated:        2025-12-15
OrgAdminHandle: PHELP123-ARIN
OrgTechHandle:  ALEFB-ARIN
OrgTechHandle:  MARKA24-ARIN
OrgAbuseHandle: PHELP123-ARIN
OrgNOCHandle:   ALEFB-ARIN
OrgNOCHandle:   MARKA24-ARIN
OrgRoutingHandle:   ALEFB-ARIN
OrgRoutingHandle:   MARKA24-ARIN
OrgDNSHandle:   ALEFB-ARIN
OrgDNSHandle:   MARKA24-ARIN
Source:         ARIN





OrgAdminHandle:       PHELP123-ARIN
OrgAdminName:         Heather Phelps
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        ALEFB-ARIN
OrgTechName:          Ben Alef
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        MARKA24-ARIN
OrgTechName:          Mark West
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       PHELP123-ARIN
OrgAbuseName:         Heather Phelps
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         ALEFB-ARIN
OrgNOCName:           Ben Alef
# Email removed, Log into bgp.tools to see whois emails


OrgNOCHandle:         MARKA24-ARIN
OrgNOCName:           Mark West
# Email removed, Log into bgp.tools to see whois emails


OrgRoutingHandle:     ALEFB-ARIN
OrgRoutingName:       Ben Alef
# Email removed, Log into bgp.tools to see whois emails


OrgRoutingHandle:     MARKA24-ARIN
OrgRoutingName:       Mark West
# Email removed, Log into bgp.tools to see whois emails


OrgDNSHandle:         ALEFB-ARIN
OrgDNSName:           Ben Alef
# Email removed, Log into bgp.tools to see whois emails


OrgDNSHandle:         MARKA24-ARIN
OrgDNSName:           Mark West
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-02-17T03:25:59Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RIPE	as-gttcust6	88598
RIPE	as-gttcust	89156
RADB	as-telstra-intl-customers	12016
RADB	as-ccf	1509
LEVEL3	as-lumen-customers-asns	10695
APNIC	as45820:as-ttsl	5991