ASN AS36671 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS36671?

AS36671 is listed under TWO SIGMA INVESTMENTS, LP.

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.

AS36671 TWO SIGMA INVESTMENTS, LP

ASN Lookup Tool

TWO SIGMA INVESTMENTS, LP twosigma.com

US 16 Routes

AS Data

AS36671

AS36671 – TWO SIGMA INVESTMENTS, LP

AS Number	36671
AS Name	TWOSIGMA2
Organization	TWO SIGMA INVESTMENTS, LP(tsi-21)
Country	US
Website	twosigma.com
Number of IPv4 Routes	14
Number of IPv6 Routes	2
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2006-03-14

ASN Intelligence API for production workflows

Use ASN data for AS36671 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
8.245.33.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	TWO SIGMA INVESTMENTS, LP	256
38.108.14.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	TWO SIGMA INVESTMENTS, LP	256
38.97.45.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	Two Sigma Investments, LP	256
207.226.133.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	TWO SIGMA INVESTMENTS, LP	256
208.77.214.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	TWO SIGMA INVESTMENTS, LP	256
212.133.79.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	TWO SIGMA INVESTMENTS, LP	256
8.2.105.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	TWO SIGMA INVESTMENTS, LP	256
208.77.212.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	TWO SIGMA INVESTMENTS, LP	256
38.27.161.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	Two Sigma Investments, LP	256
38.117.134.0/24	AS36671	TWO SIGMA INVESTMENTS, LP	Two Sigma Investments, LP	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:       36671
ASName:         TWOSIGMA2
ASHandle:       AS36671
RegDate:        2006-03-14
Updated:        2012-10-10    
Ref:            https://rdap.arin.net/registry/autnum/36671


OrgName:        TWO SIGMA INVESTMENTS, LP
OrgId:          TSI-21
Address:        100 Avenue of the Americas, 16th Floor
City:           New York
StateProv:      NY
PostalCode:     10013
Country:        US
RegDate:        2001-10-30
Updated:        2022-05-17
Ref:            https://rdap.arin.net/registry/entity/TSI-21


OrgAbuseHandle: ABUSE8450-ARIN
OrgAbuseName:   abuse contact
OrgAbusePhone:  +1-212-625-5700 
OrgAbuseEmail:  abuse@twosigma.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE8450-ARIN

OrgTechHandle: NETWO5478-ARIN
OrgTechName:   Network Engineering
OrgTechPhone:  +1-646-292-6288 
OrgTechEmail:  neteng@twosigma.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO5478-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
AS7018	AT&T Enterprises, LLC	US
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS3491	PCCW Global	US
AS1239	Cogent Communications, LLC	US
AS286	GTT Communications Inc.	NL
AS286	GTT Communications Inc.	US
AS31713	Gateway Communications	BE
AS701	Verizon Business/UUnet	US
AS174	Cogent Communications, LLC	US
AS3491	PCCW Global, Inc.	US

Upstreams

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US
AS3491	PCCW Global, Inc.	US
AS1299	Arelion Sweden AB	SE
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS174	Cogent Communications, LLC	US
AS701	Verizon Business	US