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AS394301 Dexcom, 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.

ASN Lookup Tool

Dexcom, INC. dexcom.com

US 2 Routes

AS Data

AS394301

AS394301 – Dexcom, INC.

AS Number	394301
AS Name	DEXCOM-INC
Organization	Dexcom, INC.(dexco-1)
Country	US
Website	dexcom.com
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2015-07-31

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
66.85.67.0/24	AS394301	Dexcom, INC.	Dexcom, INC.	256
8.44.236.0/24	AS394301	Dexcom, INC.	Dexcom, 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:       394301
ASName:         DEXCOM-INC
ASHandle:       AS394301
RegDate:        2015-07-31
Updated:        2015-07-31    
Ref:            https://rdap.arin.net/registry/autnum/394301


OrgName:        Dexcom, INC.
OrgId:          DEXCO-1
Address:        6340 Sequence Drive
City:           San Diego
StateProv:      CA
PostalCode:     92121
Country:        US
RegDate:        2015-03-20
Updated:        2018-07-16
Ref:            https://rdap.arin.net/registry/entity/DEXCO-1


OrgAbuseHandle: NSE43-ARIN
OrgAbuseName:   Network Systems Engineer
OrgAbusePhone:  +1-858-281-7155 
OrgAbuseEmail:  neteng@dexcom.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NSE43-ARIN

OrgTechHandle: DESCH28-ARIN
OrgTechName:   Deschenes, Robert 
OrgTechPhone:  +1-858-203-6146 
OrgTechEmail:  robert.deschenes@dexcom.com
OrgTechRef:    https://rdap.arin.net/registry/entity/DESCH28-ARIN

OrgTechHandle: NSE43-ARIN
OrgTechName:   Network Systems Engineer
OrgTechPhone:  +1-858-281-7155 
OrgTechEmail:  neteng@dexcom.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NSE43-ARIN

OrgAbuseHandle: DESCH28-ARIN
OrgAbuseName:   Deschenes, Robert 
OrgAbusePhone:  +1-858-203-6146 
OrgAbuseEmail:  robert.deschenes@dexcom.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DESCH28-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" : "394301",
    "as_handle" : "AS394301",
    "as_name" : "DEXCOM-INC",
    "tech_contacts" : [ "DESCH28-ARIN", "NSE43-ARIN" ],
    "abuse_contacts" : [ "NSE43-ARIN", "DESCH28-ARIN" ],
    "date_created" : "2015-07-31",
    "date_updated" : "2015-07-31",
    "source" : "https://rdap.arin.net/registry/autnum/394301"
  } ],
  "organization" : {
    "handle" : "DEXCO-1",
    "name" : "Dexcom, INC.",
    "address" : [ "6340 Sequence Drive", "San Diego", "CA", "92121", "US" ],
    "street" : "Sequence Drive",
    "city" : "San Diego",
    "state" : "CA",
    "zip_code" : "92121",
    "country" : [ "US" ],
    "date_created" : "2015-03-20",
    "date_updated" : "2018-07-16",
    "source" : "https://rdap.arin.net/registry/entity/DEXCO-1",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "DESCH28-ARIN",
    "name" : "Deschenes, Robert",
    "email" : [ "robert.deschenes@dexcom.com" ],
    "phone" : [ "+1-858-203-6146" ],
    "source" : "https://rdap.arin.net/registry/entity/DESCH28-ARIN"
  }, {
    "handle" : "NSE43-ARIN",
    "name" : "Network Systems Engineer",
    "email" : [ "neteng@dexcom.com" ],
    "phone" : [ "+1-858-281-7155" ],
    "source" : "https://rdap.arin.net/registry/entity/NSE43-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "NSE43-ARIN",
    "name" : "Network Systems Engineer",
    "email" : [ "neteng@dexcom.com" ],
    "phone" : [ "+1-858-281-7155" ],
    "source" : "https://rdap.arin.net/registry/entity/NSE43-ARIN"
  }, {
    "handle" : "DESCH28-ARIN",
    "name" : "Deschenes, Robert",
    "email" : [ "robert.deschenes@dexcom.com" ],
    "phone" : [ "+1-858-203-6146" ],
    "source" : "https://rdap.arin.net/registry/entity/DESCH28-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS19855	Masergy Communications, Inc.	US
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS3356	Level 3 Parent, LLC	US

Upstreams

AS Number	Description	Country
AS19855	Masergy Communications, Inc.	US
AS3356	Level 3 Parent, LLC	US

Frequently Asked Questions

What is ASN AS394301?

ASN AS394301 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS394301?

AS394301 is listed under Dexcom, 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.