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AS400476 Tailscale Inc. | IPGeolocation.io

Q: Why is WHOIS data shown for an ASN?

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

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Tailscale Inc. tailscale.com

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AS Data

AS400476

AS400476 – Tailscale Inc.

AS Number	400476
AS Name	TAILSCALE
Organization	Tailscale Inc.(tails)
Country	CA
Website	tailscale.com
Number of IPv4 Routes	0
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2022-02-22

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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:       400476
ASName:         TAILSCALE
ASHandle:       AS400476
RegDate:        2022-02-22
Updated:        2022-02-22
Comment:        https://tailscale.com    
Ref:            https://rdap.arin.net/registry/autnum/400476


OrgName:        Tailscale Inc.
OrgId:          TAILS
Address:        100 King Street West, Suite 6200
City:           Toronto
StateProv:      ON
PostalCode:     M5X 1B8
Country:        CA
RegDate:        2022-02-09
Updated:        2025-07-10
Ref:            https://rdap.arin.net/registry/entity/TAILS


OrgTechHandle: FITZP107-ARIN
OrgTechName:   Fitzpatrick, Brad 
OrgTechPhone:  +1-503-998-8415 
OrgTechEmail:  bradfitz@tailscale.com
OrgTechRef:    https://rdap.arin.net/registry/entity/FITZP107-ARIN

OrgTechHandle: ANDER2351-ARIN
OrgTechName:   Anderson, David 
OrgTechPhone:  +1-778-587-3284 
OrgTechEmail:  danderson@tailscale.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ANDER2351-ARIN

OrgAbuseHandle: ANDER2351-ARIN
OrgAbuseName:   Anderson, David 
OrgAbusePhone:  +1-778-587-3284 
OrgAbuseEmail:  danderson@tailscale.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ANDER2351-ARIN

OrgTechHandle: FISHE703-ARIN
OrgTechName:   Fisher, Kylie 
OrgTechPhone:  +1-415-886-9844 
OrgTechEmail:  kylie@tailscale.com
OrgTechRef:    https://rdap.arin.net/registry/entity/FISHE703-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

Frequently Asked Questions

What is ASN AS400476?

ASN AS400476 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS400476?

AS400476 is listed under Tailscale Inc..

What do peers, upstreams, and downstreams mean?

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 included here?

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

How can I access full ASN table data?

This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.