ASN AS21660 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21660?

AS21660 is listed under Baxalta Incorporated.

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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AS21660 Baxalta Incorporated | IPGeolocation.io

ASN Lookup Tool

Baxalta Incorporated takeda.com

US 11 Routes

AS Data

AS21660

AS21660 – Baxalta Incorporated

AS Number	21660
AS Name	BAXALTA
Organization	Baxalta Incorporated (baxal)
Country	US
Website	takeda.com
Number of IPv4 Routes	11
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2015-01-16

ASN Intelligence API for production workflows

Use ASN data for AS21660 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
185.89.150.0/24	AS21660	Baxalta Incorporated	Baxalta Incorporated	256
43.229.156.0/23	AS21660	Baxalta Incorporated	Baxalta Incorporated	512
63.244.0.0/22	AS21660	Baxalta Incorporated	Millennium Pharmaceuticals, Inc.	1024
104.254.253.0/24	AS21660	Baxalta Incorporated	Baxalta Incorporated	256
103.48.172.0/24	AS21660	Baxalta Incorporated	Baxalta incorporated	256
185.89.148.0/23	AS21660	Baxalta Incorporated	Baxalta Incorporated	512
185.89.151.0/24	AS21660	Baxalta Incorporated	Baxalta Incorporated	256
63.84.72.0/23	AS21660	Baxalta Incorporated	BAXALTA US INC	512
63.84.74.0/24	AS21660	Baxalta Incorporated	BAXALTA US INC	256
63.84.75.0/24	AS21660	Baxalta Incorporated	BAXALTA US 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:       21660
ASName:         BAXALTA
ASHandle:       AS21660
RegDate:        2015-01-16
Updated:        2015-01-16
Ref:            https://rdap.arin.net/registry/autnum/21660


OrgName:        Baxalta Incorporated
OrgId:          BAXAL
Address:        1200 Lakeside Drive
City:           Bannockburn
StateProv:      IL
PostalCode:     60015
Country:        US
RegDate:        2014-12-17
Updated:        2024-10-17
Ref:            https://rdap.arin.net/registry/entity/BAXAL


OrgAbuseHandle: BURGO43-ARIN
OrgAbuseName:   Burgos, Gerson 
OrgAbusePhone:  +1-224-940-3662 
OrgAbuseEmail:  atta.meer@takeda.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/BURGO43-ARIN

OrgTechHandle: BURGO43-ARIN
OrgTechName:   Burgos, Gerson 
OrgTechPhone:  +1-224-940-3662 
OrgTechEmail:  atta.meer@takeda.com
OrgTechRef:    https://rdap.arin.net/registry/entity/BURGO43-ARIN

OrgTechHandle: MEERA1-ARIN
OrgTechName:   Meer, Atta 
OrgTechPhone:  +1-781-528-3195 
OrgTechEmail:  atta.meer@takeda.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MEERA1-ARIN

OrgDNSHandle: MEERA1-ARIN
OrgDNSName:   Meer, Atta 
OrgDNSPhone:  +1-781-528-3195 
OrgDNSEmail:  atta.meer@takeda.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/MEERA1-ARIN

OrgAbuseHandle: AUAUM-ARIN
OrgAbuseName:   Mohamed, Atif uddin Atif uddin
OrgAbusePhone:  +1-217-761-6760 
OrgAbuseEmail:  atif.mohamed@takeda.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/AUAUM-ARIN

OrgNOCHandle: BURGO43-ARIN
OrgNOCName:   Burgos, Gerson 
OrgNOCPhone:  +1-224-940-3662 
OrgNOCEmail:  atta.meer@takeda.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/BURGO43-ARIN

OrgRoutingHandle: MEERA1-ARIN
OrgRoutingName:   Meer, Atta 
OrgRoutingPhone:  +1-781-528-3195 
OrgRoutingEmail:  atta.meer@takeda.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/MEERA1-ARIN

OrgAbuseHandle: MEERA1-ARIN
OrgAbuseName:   Meer, Atta 
OrgAbusePhone:  +1-781-528-3195 
OrgAbuseEmail:  atta.meer@takeda.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MEERA1-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

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "21660",
    "as_handle" : "AS21660",
    "as_name" : "BAXALTA",
    "admin_contacts" : [ "MEERA1-ARIN" ],
    "tech_contacts" : [ "BURGO43-ARIN", "MEERA1-ARIN", "MEERA1-ARIN" ],
    "abuse_contacts" : [ "BURGO43-ARIN", "AUAUM-ARIN", "MEERA1-ARIN" ],
    "date_created" : "2015-01-16",
    "date_updated" : "2015-01-16",
    "source" : "https://rdap.arin.net/registry/autnum/21660"
  } ],
  "organization" : {
    "handle" : "BAXAL",
    "name" : "Baxalta Incorporated",
    "address" : [ "1200 Lakeside Drive", "Bannockburn", "IL", "60015", "US" ],
    "street" : "Lakeside Drive",
    "city" : "Bannockburn",
    "state" : "IL",
    "zip_code" : "60015",
    "country" : [ "US" ],
    "date_created" : "2014-12-17",
    "date_updated" : "2024-10-17",
    "source" : "https://rdap.arin.net/registry/entity/BAXAL",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "MEERA1-ARIN",
    "name" : "Meer, Atta",
    "email" : [ "atta.meer@takeda.com" ],
    "phone" : [ "+1-781-528-3195" ],
    "source" : "https://rdap.arin.net/registry/entity/MEERA1-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "BURGO43-ARIN",
    "name" : "Burgos, Gerson",
    "email" : [ "atta.meer@takeda.com" ],
    "phone" : [ "+1-224-940-3662" ],
    "source" : "https://rdap.arin.net/registry/entity/BURGO43-ARIN"
  }, {
    "handle" : "MEERA1-ARIN",
    "name" : "Meer, Atta",
    "email" : [ "atta.meer@takeda.com" ],
    "phone" : [ "+1-781-528-3195" ],
    "source" : "https://rdap.arin.net/registry/entity/MEERA1-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "BURGO43-ARIN",
    "name" : "Burgos, Gerson",
    "email" : [ "atta.meer@takeda.com" ],
    "phone" : [ "+1-224-940-3662" ],
    "source" : "https://rdap.arin.net/registry/entity/BURGO43-ARIN"
  }, {
    "handle" : "AUAUM-ARIN",
    "name" : "Mohamed, Atif uddin Atif uddin",
    "email" : [ "atif.mohamed@takeda.com" ],
    "phone" : [ "+1-217-761-6760" ],
    "source" : "https://rdap.arin.net/registry/entity/AUAUM-ARIN"
  }, {
    "handle" : "MEERA1-ARIN",
    "name" : "Meer, Atta",
    "email" : [ "atta.meer@takeda.com" ],
    "phone" : [ "+1-781-528-3195" ],
    "source" : "https://rdap.arin.net/registry/entity/MEERA1-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS398811	Equinix, Inc.	US
AS8220	COLT Technology Services Group Limited	GB
AS8437	Hutchison Drei Austria GmbH	AT
AS209	CenturyLink Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS139883	SPTEL PTE. LTD.	SG

Upstreams

AS Number	Description	Country
AS398811	Equinix, Inc.	US
AS8220	COLT Technology Services Group Limited	GB
AS8437	Hutchison Drei Austria GmbH	AT
AS209	CenturyLink Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS139883	SPTEL PTE. LTD.	SG