ASN AS21540 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21540?

AS21540 is listed under Lewis Roca Rothgerber LLP.

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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AS21540 Lewis Roca Rothgerber LLP

ASN Lookup Tool

Lewis Roca Rothgerber LLP lewisroca.com

US 1 Routes

AS Data

AS21540

AS21540 – Lewis Roca Rothgerber LLP

AS Number	21540
AS Name	WBD-US-WEST-ASN1
Organization	Lewis Roca Rothgerber LLP (lrl-2)
Country	US
Website	lewisroca.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2001-05-18

ASN Intelligence API for production workflows

Use ASN data for AS21540 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
64.16.108.0/24	AS21540	Lewis Roca Rothgerber LLP	Lewis Roca Rothgerber LLP	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:       21540
ASName:         WBD-US-WEST-ASN1
ASHandle:       AS21540
RegDate:        2001-05-18
Updated:        2025-02-27
Comment:        https://www.womblebonddickinson.com/us
Ref:            https://rdap.arin.net/registry/autnum/21540


OrgName:        Lewis Roca Rothgerber LLP
OrgId:          LRL-2
Address:        201 E Washington Ave
Address:        Suite 300
City:           Phoenix
StateProv:      AZ
PostalCode:     85004
Country:        US
RegDate:        2000-04-15
Updated:        2021-03-31
Ref:            https://rdap.arin.net/registry/entity/LRL-2


OrgTechHandle: FREEM415-ARIN
OrgTechName:   Freeman, Joshua 
OrgTechPhone:  +1-602-528-4528 
OrgTechEmail:  jfreeman@lrrc.com
OrgTechRef:    https://rdap.arin.net/registry/entity/FREEM415-ARIN

OrgTechHandle: SS1580-ARIN
OrgTechName:   Stringham, Steven 
OrgTechPhone:  +1-602-528-4509 
OrgTechEmail:  steven.stringham@wbd-us.com
OrgTechRef:    https://rdap.arin.net/registry/entity/SS1580-ARIN

OrgAbuseHandle: WANAD14-ARIN
OrgAbuseName:   WANADMIN
OrgAbusePhone:  +1-602-528-4509 
OrgAbuseEmail:  wanadmin@lewisroca.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/WANAD14-ARIN

OrgNOCHandle: WANAD14-ARIN
OrgNOCName:   WANADMIN
OrgNOCPhone:  +1-602-528-4509 
OrgNOCEmail:  wanadmin@lewisroca.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/WANAD14-ARIN

RNOCHandle: WANAD14-ARIN
RNOCName:   WANADMIN
RNOCPhone:  +1-602-528-4509 
RNOCEmail:  wanadmin@lewisroca.com
RNOCRef:    https://rdap.arin.net/registry/entity/WANAD14-ARIN

RTechHandle: SS1580-ARIN
RTechName:   Stringham, Steven 
RTechPhone:  +1-602-528-4509 
RTechEmail:  steven.stringham@wbd-us.com
RTechRef:    https://rdap.arin.net/registry/entity/SS1580-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" : "21540",
    "as_handle" : "AS21540",
    "as_name" : "WBD-US-WEST-ASN1",
    "tech_contacts" : [ "FREEM415-ARIN", "SS1580-ARIN", "SS1580-ARIN" ],
    "abuse_contacts" : [ "WANAD14-ARIN" ],
    "date_created" : "2001-05-18",
    "date_updated" : "2025-02-27",
    "source" : "https://rdap.arin.net/registry/autnum/21540"
  } ],
  "organization" : {
    "handle" : "LRL-2",
    "name" : "Lewis Roca Rothgerber LLP",
    "address" : [ "201 E Washington Ave", "Suite 300", "Phoenix", "AZ", "85004", "US" ],
    "street" : "E Washington Ave",
    "city" : "Phoenix",
    "state" : "AZ",
    "zip_code" : "85004",
    "country" : [ "US" ],
    "date_created" : "2000-04-15",
    "date_updated" : "2021-03-31",
    "source" : "https://rdap.arin.net/registry/entity/LRL-2",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "FREEM415-ARIN",
    "name" : "Freeman, Joshua",
    "email" : [ "jfreeman@lrrc.com" ],
    "phone" : [ "+1-602-528-4528" ],
    "source" : "https://rdap.arin.net/registry/entity/FREEM415-ARIN"
  }, {
    "handle" : "SS1580-ARIN",
    "name" : "Stringham, Steven",
    "email" : [ "steven.stringham@wbd-us.com" ],
    "phone" : [ "+1-602-528-4509" ],
    "source" : "https://rdap.arin.net/registry/entity/SS1580-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "WANAD14-ARIN",
    "name" : "WANADMIN",
    "email" : [ "wanadmin@lewisroca.com" ],
    "phone" : [ "+1-602-528-4509" ],
    "source" : "https://rdap.arin.net/registry/entity/WANAD14-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS12025	Iron Mountain Data Center	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS12025	Iron Mountain Data Center	US
AS174	Cogent Communications, LLC	US