ASN AS40021 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS40021?

AS40021 is listed under Contabo 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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AS40021 Contabo Inc. | IPGeolocation.io

ASN Lookup Tool

Contabo Inc. contabo.com

US 95 Routes

AS Data

AS40021

AS40021 – Contabo Inc.

AS Number	40021
AS Name	CONTABO-40021
Organization	Contabo Inc. (conta-48)
Country	US
Website	contabo.com
Number of IPv4 Routes	90
Number of IPv6 Routes	5
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2023-05-16

ASN Intelligence API for production workflows

Use ASN data for AS40021 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
81.22.38.0/24	AS40021	Contabo Inc.	Contabo GmbH	256
5.252.54.0/23	AS40021	Contabo Inc.	Contabo GmbH	512
85.239.248.0/23	AS40021	Contabo Inc.	Contabo GmbH	512
154.12.232.0/21	AS40021	Contabo Inc.	Cogent Communications, LLC	2048
66.94.116.0/23	AS40021	Contabo Inc.	Contabo Inc.	512
38.105.232.0/24	AS40021	Contabo Inc.	Contabo Inc	256
2605:a142::/32	AS40021	Contabo Inc.	Contabo Inc.	~79×10²⁷
86.48.24.0/22	AS40021	Contabo Inc.	Contabo GmbH	1024
31.220.96.0/21	AS40021	Contabo Inc.	Contabo GmbH	2048
62.146.224.0/21	AS40021	Contabo Inc.	Contabo GmbH	2048

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:       40021
ASName:         CONTABO-40021
ASHandle:       AS40021
RegDate:        2023-05-16
Updated:        2025-07-14
Ref:            https://rdap.arin.net/registry/autnum/40021


OrgName:        Contabo Inc.
OrgId:          CONTA-48
Address:        710 N Tucker Blvd. STE 400A
City:           St. Louis
StateProv:      MO
PostalCode:     63101
Country:        US
RegDate:        2019-12-23
Updated:        2024-11-25
Ref:            https://rdap.arin.net/registry/entity/CONTA-48


OrgNOCHandle: CONTA393-ARIN
OrgNOCName:   Contabo NOC
OrgNOCPhone:  +498921665862 
OrgNOCEmail:  sascha.wintz@contabo.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/CONTA393-ARIN

OrgAbuseHandle: CAD61-ARIN
OrgAbuseName:   Contabo Abuse Department
OrgAbusePhone:  +498921665862 
OrgAbuseEmail:  abuse@contabo.de
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CAD61-ARIN

OrgTechHandle: CONTA392-ARIN
OrgTechName:   Contabo Tech
OrgTechPhone:  +498921665862 
OrgTechEmail:  johannes.selg@contabo.de
OrgTechRef:    https://rdap.arin.net/registry/entity/CONTA392-ARIN

OrgRoutingHandle: CONTA393-ARIN
OrgRoutingName:   Contabo NOC
OrgRoutingPhone:  +498921665862 
OrgRoutingEmail:  sascha.wintz@contabo.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CONTA393-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" : "40021",
    "as_handle" : "AS40021",
    "as_name" : "CONTABO-40021",
    "tech_contacts" : [ "CONTA392-ARIN", "CONTA393-ARIN" ],
    "abuse_contacts" : [ "CAD61-ARIN" ],
    "date_created" : "2023-05-16",
    "date_updated" : "2025-07-14",
    "source" : "https://rdap.arin.net/registry/autnum/40021"
  } ],
  "organization" : {
    "handle" : "CONTA-48",
    "name" : "Contabo Inc.",
    "address" : [ "710 N Tucker Blvd. STE 400A", "St. Louis", "MO", "63101", "US" ],
    "street" : "N Tucker Blvd.",
    "city" : "St. Louis",
    "state" : "MO",
    "zip_code" : "63101",
    "country" : [ "US" ],
    "date_created" : "2019-12-23",
    "date_updated" : "2024-11-25",
    "source" : "https://rdap.arin.net/registry/entity/CONTA-48",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "CONTA392-ARIN",
    "name" : "Contabo Tech",
    "email" : [ "johannes.selg@contabo.de" ],
    "phone" : [ "+498921665862" ],
    "source" : "https://rdap.arin.net/registry/entity/CONTA392-ARIN"
  }, {
    "handle" : "CONTA393-ARIN",
    "name" : "Contabo NOC",
    "email" : [ "sascha.wintz@contabo.com" ],
    "phone" : [ "+498921665862" ],
    "source" : "https://rdap.arin.net/registry/entity/CONTA393-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "CAD61-ARIN",
    "name" : "Contabo Abuse Department",
    "email" : [ "abuse@contabo.de" ],
    "phone" : [ "+498921665862" ],
    "source" : "https://rdap.arin.net/registry/entity/CAD61-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS1239	Cogent Communications, LLC	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US

Contacts

Email Contacts

sascha.wintz@contabo.com johannes.selg@contabo.de

Abuse Contacts

abuse@contabo.de