ASN AS14421 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS14421?

AS14421 is listed under Theravance Biopharma US, LLC.

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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AS14421 Theravance Biopharma US, LLC

ASN Lookup Tool

Theravance Biopharma US, LLC theravance.com

US 1 Routes

AS Data

AS14421

AS14421 – Theravance Biopharma US, LLC

AS Number	14421
AS Name	THERAVANCE
Organization	Theravance Biopharma US, LLC (tbu-3)
Country	US
Website	theravance.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	1999-12-09

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Use ASN data for AS14421 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
216.101.17.0/24	AS14421	Theravance Biopharma US, LLC	Theravance Biopharma US, LLC	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:       14421
ASName:         THERAVANCE
ASHandle:       AS14421
RegDate:        1999-12-09
Updated:        2019-08-06
Ref:            https://rdap.arin.net/registry/autnum/14421


OrgName:        Theravance Biopharma US, LLC
OrgId:          TBU-3
Address:        901 Gateway Blvd
City:           South San Francisco
StateProv:      CA
PostalCode:     94080
Country:        US
RegDate:        2018-11-13
Updated:        2026-08-13
Ref:            https://rdap.arin.net/registry/entity/TBU-3


OrgAbuseHandle: KNIGH361-ARIN
OrgAbuseName:   Knight, stuart 
OrgAbusePhone:  +1-650-808-3780 
OrgAbuseEmail:  sknight@theravance.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/KNIGH361-ARIN

OrgTechHandle: CHANA60-ARIN
OrgTechName:   Chan, Anthony 
OrgTechPhone:  +1-415-298-9832 
OrgTechEmail:  achan@theravance.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CHANA60-ARIN

OrgRoutingHandle: CHANA60-ARIN
OrgRoutingName:   Chan, Anthony 
OrgRoutingPhone:  +1-415-298-9832 
OrgRoutingEmail:  achan@theravance.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CHANA60-ARIN

OrgNOCHandle: CHANA60-ARIN
OrgNOCName:   Chan, Anthony 
OrgNOCPhone:  +1-415-298-9832 
OrgNOCEmail:  achan@theravance.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/CHANA60-ARIN

OrgAbuseHandle: CHANA60-ARIN
OrgAbuseName:   Chan, Anthony 
OrgAbusePhone:  +1-415-298-9832 
OrgAbuseEmail:  achan@theravance.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CHANA60-ARIN

OrgNOCHandle: KNIGH361-ARIN
OrgNOCName:   Knight, stuart 
OrgNOCPhone:  +1-650-808-3780 
OrgNOCEmail:  sknight@theravance.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/KNIGH361-ARIN

OrgRoutingHandle: KNIGH361-ARIN
OrgRoutingName:   Knight, stuart 
OrgRoutingPhone:  +1-650-808-3780 
OrgRoutingEmail:  sknight@theravance.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/KNIGH361-ARIN

OrgDNSHandle: KNIGH361-ARIN
OrgDNSName:   Knight, stuart 
OrgDNSPhone:  +1-650-808-3780 
OrgDNSEmail:  sknight@theravance.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/KNIGH361-ARIN

OrgDNSHandle: CHANA60-ARIN
OrgDNSName:   Chan, Anthony 
OrgDNSPhone:  +1-415-298-9832 
OrgDNSEmail:  achan@theravance.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/CHANA60-ARIN

OrgTechHandle: KNIGH361-ARIN
OrgTechName:   Knight, stuart 
OrgTechPhone:  +1-650-808-3780 
OrgTechEmail:  sknight@theravance.com
OrgTechRef:    https://rdap.arin.net/registry/entity/KNIGH361-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" : "14421",
    "as_handle" : "AS14421",
    "as_name" : "THERAVANCE",
    "admin_contacts" : [ "KNIGH361-ARIN", "CHANA60-ARIN" ],
    "tech_contacts" : [ "CHANA60-ARIN", "CHANA60-ARIN", "KNIGH361-ARIN", "KNIGH361-ARIN" ],
    "abuse_contacts" : [ "KNIGH361-ARIN", "CHANA60-ARIN" ],
    "date_created" : "1999-12-09",
    "date_updated" : "2019-08-06",
    "source" : "https://rdap.arin.net/registry/autnum/14421"
  } ],
  "organization" : {
    "handle" : "TBU-3",
    "name" : "Theravance Biopharma US, LLC",
    "address" : [ "901 Gateway Blvd", "South San Francisco", "CA", "94080", "US" ],
    "street" : "Gateway Blvd",
    "city" : "South San Francisco",
    "state" : "CA",
    "zip_code" : "94080",
    "country" : [ "US" ],
    "date_created" : "2018-11-13",
    "date_updated" : "2026-08-13",
    "source" : "https://rdap.arin.net/registry/entity/TBU-3",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "KNIGH361-ARIN",
    "name" : "Knight, stuart",
    "email" : [ "sknight@theravance.com" ],
    "phone" : [ "+1-650-808-3780" ],
    "source" : "https://rdap.arin.net/registry/entity/KNIGH361-ARIN"
  }, {
    "handle" : "CHANA60-ARIN",
    "name" : "Chan, Anthony",
    "email" : [ "achan@theravance.com" ],
    "phone" : [ "+1-415-298-9832" ],
    "source" : "https://rdap.arin.net/registry/entity/CHANA60-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "CHANA60-ARIN",
    "name" : "Chan, Anthony",
    "email" : [ "achan@theravance.com" ],
    "phone" : [ "+1-415-298-9832" ],
    "source" : "https://rdap.arin.net/registry/entity/CHANA60-ARIN"
  }, {
    "handle" : "KNIGH361-ARIN",
    "name" : "Knight, stuart",
    "email" : [ "sknight@theravance.com" ],
    "phone" : [ "+1-650-808-3780" ],
    "source" : "https://rdap.arin.net/registry/entity/KNIGH361-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "KNIGH361-ARIN",
    "name" : "Knight, stuart",
    "email" : [ "sknight@theravance.com" ],
    "phone" : [ "+1-650-808-3780" ],
    "source" : "https://rdap.arin.net/registry/entity/KNIGH361-ARIN"
  }, {
    "handle" : "CHANA60-ARIN",
    "name" : "Chan, Anthony",
    "email" : [ "achan@theravance.com" ],
    "phone" : [ "+1-415-298-9832" ],
    "source" : "https://rdap.arin.net/registry/entity/CHANA60-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS33667	Comcast Cable Communications, LLC	US
AS33651	Comcast Cable Communications, LLC	US

Upstreams

AS Number	Description	Country
AS33667	Comcast Cable Communications, LLC	US
AS33651	Comcast Cable Communications, LLC	US