ASN AS27021 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS27021?

AS27021 is listed under Quest Diagnostics, 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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AS27021 Quest Diagnostics, Inc.

ASN Lookup Tool

Quest Diagnostics, Inc. questdiagnostics.com

US 17 Routes

AS Data

AS27021

AS27021 – Quest Diagnostics, Inc.

AS Number	27021
AS Name	AS-DGX
Organization	Quest Diagnostics, Inc. (quest-3)
Country	US
Website	questdiagnostics.com
Number of IPv4 Routes	17
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2003-01-14

ASN Intelligence API for production workflows

Use ASN data for AS27021 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
209.242.250.0/24	AS27021	Quest Diagnostics, Inc.	LabOne, Inc.	256
216.203.80.0/21	AS27021	Quest Diagnostics, Inc.	Quest Diagnostics, Inc.	2048
209.242.247.0/24	AS27021	Quest Diagnostics, Inc.	LabOne, Inc.	256
204.235.142.0/23	AS27021	Quest Diagnostics, Inc.	Solstas Lab Partners, LLC	512
209.242.241.0/24	AS27021	Quest Diagnostics, Inc.	LabOne, Inc.	256
216.203.87.0/24	AS27021	Quest Diagnostics, Inc.	Quest Diagnostics, Inc.	256
216.203.88.0/21	AS27021	Quest Diagnostics, Inc.	Quest Diagnostics, Inc.	2048
216.203.80.0/20	AS27021	Quest Diagnostics, Inc.	Quest Diagnostics, Inc.	4096
216.203.80.0/24	AS27021	Quest Diagnostics, Inc.	Quest Diagnostics, Inc.	256
216.203.92.0/22	AS27021	Quest Diagnostics, Inc.	Quest Diagnostics, Inc.	1024

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:       27021
ASName:         AS-DGX
ASHandle:       AS27021
RegDate:        2003-01-14
Updated:        2014-05-30
Ref:            https://rdap.arin.net/registry/autnum/27021


OrgName:        Quest Diagnostics, Inc.
OrgId:          QUEST-3
Address:        1290 Wall Street West
City:           Lyndhurst
StateProv:      NJ
PostalCode:     07071
Country:        US
RegDate:        2002-09-30
Updated:        2014-09-24
Ref:            https://rdap.arin.net/registry/entity/QUEST-3


OrgAbuseHandle: QDT-ARIN
OrgAbuseName:   Quest Diagnostics Tech
OrgAbusePhone:  +1-877-537-8378 
OrgAbuseEmail:  inf-tech@questdiagnostics.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/QDT-ARIN

OrgTechHandle: MONAC4-ARIN
OrgTechName:   Monaco, Chris 
OrgTechPhone:  +1-610-631-4654 
OrgTechEmail:  chris.l.monaco@questdiagnostics.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MONAC4-ARIN

OrgTechHandle: QDT-ARIN
OrgTechName:   Quest Diagnostics Tech
OrgTechPhone:  +1-877-537-8378 
OrgTechEmail:  inf-tech@questdiagnostics.com
OrgTechRef:    https://rdap.arin.net/registry/entity/QDT-ARIN

OrgAbuseHandle: MONAC4-ARIN
OrgAbuseName:   Monaco, Chris 
OrgAbusePhone:  +1-610-631-4654 
OrgAbuseEmail:  chris.l.monaco@questdiagnostics.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MONAC4-ARIN

OrgNOCHandle: MONAC4-ARIN
OrgNOCName:   Monaco, Chris 
OrgNOCPhone:  +1-610-631-4654 
OrgNOCEmail:  chris.l.monaco@questdiagnostics.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/MONAC4-ARIN

OrgNOCHandle: QDT-ARIN
OrgNOCName:   Quest Diagnostics Tech
OrgNOCPhone:  +1-877-537-8378 
OrgNOCEmail:  inf-tech@questdiagnostics.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/QDT-ARIN

RTechHandle: MG308-ARIN
RTechName:   Gallagher, Mike J
RTechPhone:  +1-610-650-6791 
RTechEmail:  mike.j.gallagher@questdiagnostics.com
RTechRef:    https://rdap.arin.net/registry/entity/MG308-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" : "27021",
    "as_handle" : "AS27021",
    "as_name" : "AS-DGX",
    "tech_contacts" : [ "MONAC4-ARIN", "QDT-ARIN", "MG308-ARIN" ],
    "abuse_contacts" : [ "QDT-ARIN", "MONAC4-ARIN" ],
    "date_created" : "2003-01-14",
    "date_updated" : "2014-05-30",
    "source" : "https://rdap.arin.net/registry/autnum/27021"
  } ],
  "organization" : {
    "handle" : "QUEST-3",
    "name" : "Quest Diagnostics, Inc.",
    "address" : [ "1290 Wall Street West", "Lyndhurst", "NJ", "07071", "US" ],
    "street" : "Wall Street West",
    "city" : "Lyndhurst",
    "state" : "NJ",
    "zip_code" : "07071",
    "country" : [ "US" ],
    "date_created" : "2002-09-30",
    "date_updated" : "2014-09-24",
    "source" : "https://rdap.arin.net/registry/entity/QUEST-3",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "MONAC4-ARIN",
    "name" : "Monaco, Chris",
    "email" : [ "chris.l.monaco@questdiagnostics.com" ],
    "phone" : [ "+1-610-631-4654" ],
    "source" : "https://rdap.arin.net/registry/entity/MONAC4-ARIN"
  }, {
    "handle" : "QDT-ARIN",
    "name" : "Quest Diagnostics Tech",
    "email" : [ "inf-tech@questdiagnostics.com" ],
    "phone" : [ "+1-877-537-8378" ],
    "source" : "https://rdap.arin.net/registry/entity/QDT-ARIN"
  }, {
    "handle" : "MG308-ARIN",
    "name" : "Gallagher, Mike J",
    "email" : [ "mike.j.gallagher@questdiagnostics.com" ],
    "phone" : [ "+1-610-650-6791" ],
    "source" : "https://rdap.arin.net/registry/entity/MG308-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "QDT-ARIN",
    "name" : "Quest Diagnostics Tech",
    "email" : [ "inf-tech@questdiagnostics.com" ],
    "phone" : [ "+1-877-537-8378" ],
    "source" : "https://rdap.arin.net/registry/entity/QDT-ARIN"
  }, {
    "handle" : "MONAC4-ARIN",
    "name" : "Monaco, Chris",
    "email" : [ "chris.l.monaco@questdiagnostics.com" ],
    "phone" : [ "+1-610-631-4654" ],
    "source" : "https://rdap.arin.net/registry/entity/MONAC4-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS11367	WorldNet Telecommunications, LLC	PR
AS701	Verizon Business/UUnet	US
AS3356	Level 3 Parent, LLC	US
AS701	Verizon Business	US
AS11992	Liberty Mobile Puerto Rico Inc.	PR

Upstreams

AS Number	Description	Country
AS11367	WorldNet Telecommunications, LLC	PR
AS3356	Level 3 Parent, LLC	US
AS701	Verizon Business	US
AS11992	Liberty Mobile Puerto Rico Inc.	PR