ASN AS26211 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS26211?

AS26211 is listed under Proofpoint, 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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AS26211 Proofpoint, Inc. | IPGeolocation.io

ASN Lookup Tool

Proofpoint, Inc. proofpoint.com

US 51 Routes

AS Data

AS26211

AS26211 – Proofpoint, Inc.

AS Number	26211
AS Name	PROOFPOINT-ASN-US-WEST
Organization	Proofpoint, Inc. (proof)
Country	US
Website	proofpoint.com
Number of IPv4 Routes	48
Number of IPv6 Routes	3
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2007-10-31

ASN Intelligence API for production workflows

Use ASN data for AS26211 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
67.231.159.0/24	AS26211	Proofpoint, Inc.	Proofpoint, Inc.	256
66.159.241.0/24	AS26211	Proofpoint, Inc.	Proofpoint, Inc.	256
208.86.202.0/24	AS26211	Proofpoint, Inc.	Proofpoint, Inc.	256
148.163.156.0/23	AS26211	Proofpoint, Inc.	Proofpoint, Inc.	512
208.56.10.0/24	AS26211	Proofpoint, Inc.	Meta Networks Inc	256
148.163.145.0/24	AS26211	Proofpoint, Inc.	Proofpoint, Inc.	256
205.220.164.0/24	AS26211	Proofpoint, Inc.	Proofpoint, Inc.	256
205.220.169.0/24	AS26211	Proofpoint, Inc.	Proofpoint, Inc.	256
67.231.145.0/24	AS26211	Proofpoint, Inc.	Proofpoint, Inc.	256
205.220.170.0/24	AS26211	Proofpoint, Inc.	Proofpoint, 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:       26211
ASName:         PROOFPOINT-ASN-US-WEST
ASHandle:       AS26211
RegDate:        2007-10-31
Updated:        2012-02-24
Ref:            https://rdap.arin.net/registry/autnum/26211


OrgName:        Proofpoint, Inc.
OrgId:          PROOF
Address:        925 W Maude Ave
City:           Sunnyvale
StateProv:      CA
PostalCode:     94085
Country:        US
RegDate:        2007-10-16
Updated:        2021-06-15
Ref:            https://rdap.arin.net/registry/entity/PROOF


OrgAbuseHandle: PAA19-ARIN
OrgAbuseName:   Proofpoint ARIN Abuse
OrgAbusePhone:  +1-801-748-4494 
OrgAbuseEmail:  abuse@proofpoint.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/PAA19-ARIN

OrgTechHandle: NETWO2061-ARIN
OrgTechName:   Network Operations
OrgTechPhone:  +1-801-748-4444 
OrgTechEmail:  arin-management@proofpoint.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO2061-ARIN

RAbuseHandle: NETWO2061-ARIN
RAbuseName:   Network Operations
RAbusePhone:  +1-801-748-4444 
RAbuseEmail:  arin-management@proofpoint.com
RAbuseRef:    https://rdap.arin.net/registry/entity/NETWO2061-ARIN

RTechHandle: NETWO2061-ARIN
RTechName:   Network Operations
RTechPhone:  +1-801-748-4444 
RTechEmail:  arin-management@proofpoint.com
RTechRef:    https://rdap.arin.net/registry/entity/NETWO2061-ARIN

RNOCHandle: NETWO2061-ARIN
RNOCName:   Network Operations
RNOCPhone:  +1-801-748-4444 
RNOCEmail:  arin-management@proofpoint.com
RNOCRef:    https://rdap.arin.net/registry/entity/NETWO2061-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" : "26211",
    "as_handle" : "AS26211",
    "as_name" : "PROOFPOINT-ASN-US-WEST",
    "tech_contacts" : [ "NETWO2061-ARIN", "NETWO2061-ARIN" ],
    "abuse_contacts" : [ "PAA19-ARIN", "NETWO2061-ARIN" ],
    "date_created" : "2007-10-31",
    "date_updated" : "2012-02-24",
    "source" : "https://rdap.arin.net/registry/autnum/26211"
  } ],
  "organization" : {
    "handle" : "PROOF",
    "name" : "Proofpoint, Inc.",
    "address" : [ "925 W Maude Ave", "Sunnyvale", "CA", "94085", "US" ],
    "street" : "W Maude Ave",
    "city" : "Sunnyvale",
    "state" : "CA",
    "zip_code" : "94085",
    "country" : [ "US" ],
    "date_created" : "2007-10-16",
    "date_updated" : "2021-06-15",
    "source" : "https://rdap.arin.net/registry/entity/PROOF",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "NETWO2061-ARIN",
    "name" : "Network Operations",
    "email" : [ "arin-management@proofpoint.com" ],
    "phone" : [ "+1-801-748-4444" ],
    "source" : "https://rdap.arin.net/registry/entity/NETWO2061-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "PAA19-ARIN",
    "name" : "Proofpoint ARIN Abuse",
    "email" : [ "abuse@proofpoint.com" ],
    "phone" : [ "+1-801-748-4494" ],
    "source" : "https://rdap.arin.net/registry/entity/PAA19-ARIN"
  }, {
    "handle" : "NETWO2061-ARIN",
    "name" : "Network Operations",
    "email" : [ "arin-management@proofpoint.com" ],
    "phone" : [ "+1-801-748-4444" ],
    "source" : "https://rdap.arin.net/registry/entity/NETWO2061-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS1239	Cogent Communications, LLC	US
AS33651	Comcast Cable Communications, LLC	US
AS1299	Arelion Sweden AB	SE
AS21949	Beanfield Technologies Inc.	CA
AS32323	Equinix, Inc.	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS33651	Comcast Cable Communications, LLC	US
AS1299	Arelion Sweden AB	SE
AS21949	Beanfield Technologies Inc.	CA
AS32323	Equinix, Inc.	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US