ASN AS21965 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21965?

AS21965 is listed under Highmark 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?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS21965 Highmark Inc | IPGeolocation.io

ASN Lookup Tool

Highmark Inc highmark.com

US 22 Routes

AS Data

AS21965

AS21965 – Highmark Inc

AS Number	21965
AS Name	HIGHMARK
Organization	Highmark Inc (highm-5)
Country	US
Website	highmark.com
Number of IPv4 Routes	22
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2001-07-19

ASN Intelligence API for production workflows

Use ASN data for AS21965 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
167.164.7.0/24	AS21965	Highmark Inc	Highmark Inc	256
157.154.8.0/24	AS21965	Highmark Inc	Highmark Inc	256
157.154.14.0/24	AS21965	Highmark Inc	Highmark Inc	256
157.154.11.0/24	AS21965	Highmark Inc	Highmark Inc	256
192.152.123.0/24	AS21965	Highmark Inc	Highmark Inc	256
157.154.20.0/24	AS21965	Highmark Inc	Highmark Inc	256
199.190.160.0/24	AS21965	Highmark Inc	Highmark Inc	256
157.154.7.0/24	AS21965	Highmark Inc	Highmark Inc	256
167.164.5.0/24	AS21965	Highmark Inc	Highmark Inc	256
167.164.14.0/24	AS21965	Highmark Inc	Highmark 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:       21965
ASName:         HIGHMARK
ASHandle:       AS21965
RegDate:        2001-07-19
Updated:        2014-10-27
Ref:            https://rdap.arin.net/registry/autnum/21965


OrgName:        Highmark Inc
OrgId:          HIGHM-5
Address:        120 Fifth Avenue Place
City:           Pittsburgh
StateProv:      PA
PostalCode:     15222
Country:        US
RegDate:        2012-08-29
Updated:        2012-08-29
Ref:            https://rdap.arin.net/registry/entity/HIGHM-5


OrgTechHandle: WWWAD-ARIN
OrgTechName:   www-admin
OrgTechPhone:  +1-717-302-5275 
OrgTechEmail:  arinpoc@highmark.com
OrgTechRef:    https://rdap.arin.net/registry/entity/WWWAD-ARIN

OrgNOCHandle: WWWAD-ARIN
OrgNOCName:   www-admin
OrgNOCPhone:  +1-717-302-5275 
OrgNOCEmail:  arinpoc@highmark.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/WWWAD-ARIN

OrgAbuseHandle: WWWAD-ARIN
OrgAbuseName:   www-admin
OrgAbusePhone:  +1-717-302-5275 
OrgAbuseEmail:  arinpoc@highmark.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/WWWAD-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" : "21965",
    "as_handle" : "AS21965",
    "as_name" : "HIGHMARK",
    "tech_contacts" : [ "WWWAD-ARIN" ],
    "abuse_contacts" : [ "WWWAD-ARIN" ],
    "date_created" : "2001-07-19",
    "date_updated" : "2014-10-27",
    "source" : "https://rdap.arin.net/registry/autnum/21965"
  } ],
  "organization" : {
    "handle" : "HIGHM-5",
    "name" : "Highmark Inc",
    "address" : [ "120 Fifth Avenue Place", "Pittsburgh", "PA", "15222", "US" ],
    "street" : "Fifth Avenue Place",
    "city" : "Pittsburgh",
    "state" : "PA",
    "zip_code" : "15222",
    "country" : [ "US" ],
    "date_created" : "2012-08-29",
    "date_updated" : "2012-08-29",
    "source" : "https://rdap.arin.net/registry/entity/HIGHM-5",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "WWWAD-ARIN",
    "name" : "www-admin",
    "email" : [ "arinpoc@highmark.com" ],
    "phone" : [ "+1-717-302-5275" ],
    "source" : "https://rdap.arin.net/registry/entity/WWWAD-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "WWWAD-ARIN",
    "name" : "www-admin",
    "email" : [ "arinpoc@highmark.com" ],
    "phone" : [ "+1-717-302-5275" ],
    "source" : "https://rdap.arin.net/registry/entity/WWWAD-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS46887	Crown Castle Fiber LLC	US
AS7018	AT&T Enterprises, LLC	US
AS22255	Allegheny Health Network	US
AS15830	Equinix (EMEA) Acquisition Enterprises B.V.	NL
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS7016	Comcast Cable Communications, LLC	US

Upstreams

AS Number	Description	Country
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS46887	Crown Castle Fiber LLC	US
AS7018	AT&T Enterprises, LLC	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS7016	Comcast Cable Communications, LLC	US

Downstreams

AS Number	Description	Country
AS22255	Allegheny Health Network	US