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AS4211 Maricopa County Government

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

Maricopa County Government mail.maricopa.gov

US 6 Routes

AS Data

AS4211

AS4211 – Maricopa County Government

AS Number	4211
AS Name	ASN-MARICOPA1
Organization	Maricopa County Government (mcg-14)
Country	US
Website	mail.maricopa.gov
Number of IPv4 Routes	6
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	1995-01-06

ASN Intelligence API for production workflows

Use ASN data for AS4211 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
156.42.0.0/16	AS4211	Maricopa County Government	Maricopa County	65536
156.42.16.0/20	AS4211	Maricopa County Government	Maricopa County	4096
156.42.192.0/21	AS203	Level 3 Parent, LLC	Maricopa County	2048
156.42.200.0/21	AS203	Level 3 Parent, LLC	Maricopa County	2048
156.42.216.0/21	AS203	Level 3 Parent, LLC	Maricopa County	2048
156.42.0.0/20	AS4211	Maricopa County Government	Maricopa County	4096

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:       4211
ASName:         ASN-MARICOPA1
ASHandle:       AS4211
RegDate:        1995-01-06
Updated:        2000-10-02
Ref:            https://rdap.arin.net/registry/autnum/4211


OrgName:        Maricopa County Government
OrgId:          MCG-14
Address:        301 S. 4th Ave
City:           Phoenix
StateProv:      AZ
PostalCode:     85003
Country:        US
RegDate:        1995-01-06
Updated:        2011-09-24
Ref:            https://rdap.arin.net/registry/entity/MCG-14


OrgAbuseHandle: DHW24-ARIN
OrgAbuseName:   Wilkins, Dan H
OrgAbusePhone:  +1-602-506-5864 
OrgAbuseEmail:  hostmaster@mail.maricopa.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/DHW24-ARIN

OrgTechHandle: DHW24-ARIN
OrgTechName:   Wilkins, Dan H
OrgTechPhone:  +1-602-506-5864 
OrgTechEmail:  hostmaster@mail.maricopa.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/DHW24-ARIN

RTechHandle: JA117-ARIN
RTechName:   Allen, Jerry 
RTechPhone:  +1-602-506-8195 
RTechEmail:  sue.matyas@mail.maricopa.gov
RTechRef:    https://rdap.arin.net/registry/entity/JA117-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" : "4211",
    "as_handle" : "AS4211",
    "as_name" : "ASN-MARICOPA1",
    "tech_contacts" : [ "DHW24-ARIN", "JA117-ARIN" ],
    "abuse_contacts" : [ "DHW24-ARIN" ],
    "date_created" : "1995-01-06",
    "date_updated" : "2000-10-02",
    "source" : "https://rdap.arin.net/registry/autnum/4211"
  } ],
  "organization" : {
    "handle" : "MCG-14",
    "name" : "Maricopa County Government",
    "address" : [ "301 S. 4th Ave", "Phoenix", "AZ", "85003", "US" ],
    "street" : "S. 4th Ave",
    "city" : "Phoenix",
    "state" : "AZ",
    "zip_code" : "85003",
    "country" : [ "US" ],
    "date_created" : "1995-01-06",
    "date_updated" : "2011-09-24",
    "source" : "https://rdap.arin.net/registry/entity/MCG-14",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "DHW24-ARIN",
    "name" : "Wilkins, Dan H",
    "email" : [ "hostmaster@mail.maricopa.gov" ],
    "phone" : [ "+1-602-506-5864" ],
    "source" : "https://rdap.arin.net/registry/entity/DHW24-ARIN"
  }, {
    "handle" : "JA117-ARIN",
    "name" : "Allen, Jerry",
    "email" : [ "sue.matyas@mail.maricopa.gov" ],
    "phone" : [ "+1-602-506-8195" ],
    "source" : "https://rdap.arin.net/registry/entity/JA117-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "DHW24-ARIN",
    "name" : "Wilkins, Dan H",
    "email" : [ "hostmaster@mail.maricopa.gov" ],
    "phone" : [ "+1-602-506-5864" ],
    "source" : "https://rdap.arin.net/registry/entity/DHW24-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS13335	Cloudflare, Inc.	US
AS209	CenturyLink Communications, LLC	US
AS22773	Cox Communications Inc.	US

Upstreams

AS Number	Description	Country
AS13335	Cloudflare, Inc.	US
AS209	CenturyLink Communications, LLC	US
AS22773	Cox Communications Inc.	US

Frequently Asked Questions

What is ASN AS4211?

ASN AS4211 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS4211?

AS4211 is listed under Maricopa County Government.

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.