ASN AS29987 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS29987?

AS29987 is listed under Sinfony6, LLC.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS29987 Sinfony6, LLC | IPGeolocation.io

ASN Lookup Tool

Sinfony6, LLC sinfony6.com

US 28 Routes

AS Data

AS29987

AS29987 – Sinfony6, LLC

AS Number	29987
AS Name	SINFONY6
Organization	Sinfony6, LLC(sl-2222)
Country	US
Website	sinfony6.com
Number of IPv4 Routes	28
Number of IPv6 Routes	0
ASN type	ISP
Registry	ARIN
Date Allocated	2025-02-11

ASN Intelligence API for production workflows

Use ASN data for AS29987 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
187.31.5.0/24	AS29987	Sinfony6, LLC	Oi S.A. - Em Recuperação Judicial	256
187.203.223.0/24	AS29987	Sinfony6, LLC	UNINET	256
187.31.0.0/24	AS29987	Sinfony6, LLC	Oi S.A. - Em Recuperação Judicial	256
187.203.219.0/24	AS29987	Sinfony6, LLC	UNINET	256
187.203.214.0/24	AS29987	Sinfony6, LLC	UNINET	256
187.31.4.0/24	AS29987	Sinfony6, LLC	Oi S.A. - Em Recuperação Judicial	256
187.203.210.0/24	AS29987	Sinfony6, LLC	UNINET	256
187.31.6.0/24	AS29987	Sinfony6, LLC	Oi S.A. - Em Recuperação Judicial	256
187.203.211.0/24	AS29987	Sinfony6, LLC	UNINET	256
187.203.218.0/24	AS29987	Sinfony6, LLC	UNINET	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:       29987
ASName:         SINFONY6
ASHandle:       AS29987
RegDate:        2025-02-11
Updated:        2025-02-11    
Ref:            https://rdap.arin.net/registry/autnum/29987


OrgName:        Sinfony6, LLC
OrgId:          SL-2222
Address:        1942 Broadway Ste 314C
City:           Boulder
StateProv:      CO
PostalCode:     80302
Country:        US
RegDate:        2025-01-30
Updated:        2025-02-07
Ref:            https://rdap.arin.net/registry/entity/SL-2222


OrgNOCHandle: NETWO10276-ARIN
OrgNOCName:   Network
OrgNOCPhone:  +17192984140 
OrgNOCEmail:  network@sinfony6.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NETWO10276-ARIN

OrgAbuseHandle: NETWO10276-ARIN
OrgAbuseName:   Network
OrgAbusePhone:  +17192984140 
OrgAbuseEmail:  network@sinfony6.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO10276-ARIN

OrgRoutingHandle: NETWO10276-ARIN
OrgRoutingName:   Network
OrgRoutingPhone:  +17192984140 
OrgRoutingEmail:  network@sinfony6.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/NETWO10276-ARIN

OrgDNSHandle: NETWO10276-ARIN
OrgDNSName:   Network
OrgDNSPhone:  +17192984140 
OrgDNSEmail:  network@sinfony6.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/NETWO10276-ARIN

OrgTechHandle: NETWO10276-ARIN
OrgTechName:   Network
OrgTechPhone:  +17192984140 
OrgTechEmail:  network@sinfony6.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO10276-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
AS286	GTT Communications Inc.	NL
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS32097	WholeSale Internet, Inc.	US

Upstreams

AS Number	Description	Country
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS32097	WholeSale Internet, Inc.	US