ASN AS21811 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21811?

AS21811 is listed under Build A Bear Workshop, Inc..

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?

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AS21811 Build A Bear Workshop, Inc.

ASN Lookup Tool

Build A Bear Workshop, Inc. buildabear.com

US 1 Routes

AS Data

AS21811

AS21811 – Build A Bear Workshop, Inc.

AS Number	21811
AS Name	BAB
Organization	Build A Bear Workshop, Inc.(bw-425)
Country	US
Website	buildabear.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2018-03-07

ASN Intelligence API for production workflows

Use ASN data for AS21811 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
104.238.197.0/24	AS21811	Build A Bear Workshop, Inc.	Build A Bear Workshop, Inc.	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:       21811
ASName:         BAB
ASHandle:       AS21811
RegDate:        2018-03-07
Updated:        2018-03-07    
Ref:            https://rdap.arin.net/registry/autnum/21811


OrgName:        Build-A-Bear Workshop, Inc.
OrgId:          BW-425
Address:        1954 Innerbelt Business Center Dr.
City:           Saint Louis
StateProv:      MO
PostalCode:     63114
Country:        US
RegDate:        2017-08-15
Updated:        2018-01-22
Ref:            https://rdap.arin.net/registry/entity/BW-425


OrgTechHandle: ELDER44-ARIN
OrgTechName:   Elder, Daniel 
OrgTechPhone:  +1-314-593-3240 
OrgTechEmail:  danielel@buildabear.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ELDER44-ARIN

OrgTechHandle: BRAWN-ARIN
OrgTechName:   Brawner, David 
OrgTechPhone:  +1-314-593-3210 
OrgTechEmail:  davidbr@buildabear.com
OrgTechRef:    https://rdap.arin.net/registry/entity/BRAWN-ARIN

OrgNOCHandle: ELDER44-ARIN
OrgNOCName:   Elder, Daniel 
OrgNOCPhone:  +1-314-593-3240 
OrgNOCEmail:  danielel@buildabear.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ELDER44-ARIN

OrgAbuseHandle: BRAWN-ARIN
OrgAbuseName:   Brawner, David 
OrgAbusePhone:  +1-314-593-3210 
OrgAbuseEmail:  davidbr@buildabear.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/BRAWN-ARIN

OrgAbuseHandle: EASTD1-ARIN
OrgAbuseName:   East, Dave 
OrgAbusePhone:  +1-314-409-0537 
OrgAbuseEmail:  davee@buildabear.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/EASTD1-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
AS3356	Level 3 Parent, LLC	US

Upstreams

AS Number	Description	Country
AS7018	AT&T Enterprises, LLC	US
AS3356	Level 3 Parent, LLC	US