ASN AS21955 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21955?

AS21955 is listed under Grifols 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?

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.

AS21955 Grifols Inc. | IPGeolocation.io

ASN Lookup Tool

Grifols Inc. grifols.com

US 4 Routes

AS Data

AS21955

AS21955 – Grifols Inc.

AS Number	21955
AS Name	GRIFOLS
Organization	Grifols Inc.(grifo)
Country	US
Website	grifols.com
Number of IPv4 Routes	4
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2006-02-07

ASN Intelligence API for production workflows

Use ASN data for AS21955 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
204.126.167.0/24	AS21955	Grifols Inc.	Grifols Inc.	256
204.126.166.0/24	AS21955	Grifols Inc.	Grifols Inc.	256
67.238.94.0/24	AS21955	Grifols Inc.	Talecris Biotherapeutics Inc	256
24.199.219.0/24	AS21955	Grifols Inc.	TALECRIS BIOTHERAPEUTICS	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:       21955
ASName:         GRIFOLS
ASHandle:       AS21955
RegDate:        2006-02-07
Updated:        2019-07-31    
Ref:            https://rdap.arin.net/registry/autnum/21955


OrgName:        Grifols Inc.
OrgId:          GRIFO
Address:        2410 Lillyale Ave
Address:        IT Department
City:           Los Angeles
StateProv:      CA
PostalCode:     90032
Country:        US
RegDate:        2007-06-08
Updated:        2019-04-05
Ref:            https://rdap.arin.net/registry/entity/GRIFO


OrgTechHandle: GBF-ARIN
OrgTechName:   Faulder, George B
OrgTechPhone:  +1-919-359-4216 
OrgTechEmail:  bud.faulder@grifols.com
OrgTechRef:    https://rdap.arin.net/registry/entity/GBF-ARIN

OrgAbuseHandle: RCH95-ARIN
OrgAbuseName:   Chiu, Ronald 
OrgAbusePhone:  +1-323-441-7999 
OrgAbuseEmail:  Ronald.Chiu@grifols.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/RCH95-ARIN

OrgTechHandle: TERPE-ARIN
OrgTechName:   Terpening, Robert 
OrgTechPhone:  +1-919-316-6278 
OrgTechEmail:  robert.terpening@grifols.com
OrgTechRef:    https://rdap.arin.net/registry/entity/TERPE-ARIN

OrgTechHandle: RCH95-ARIN
OrgTechName:   Chiu, Ronald 
OrgTechPhone:  +1-323-441-7999 
OrgTechEmail:  Ronald.Chiu@grifols.com
OrgTechRef:    https://rdap.arin.net/registry/entity/RCH95-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
AS1273	Vodafone Group PLC	GB
AS1273	Vodafone Group PLC	NL
AS3356	Level 3 Parent, LLC	US

Upstreams

AS Number	Description	Country
AS1273	Vodafone Group PLC	NL
AS3356	Level 3 Parent, LLC	US