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AS401606 Colorado Department of Transportation

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

Colorado Department of Transportation state.co.us

US 1 Routes

AS Data

AS401606

AS401606 – Colorado Department of Transportation

AS Number	401606
AS Name	CDOT-ITS-01
Organization	Colorado Department of Transportation(cdt-63)
Country	US
Website	state.co.us
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	2025-01-15

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Use ASN data for AS401606 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
205.169.171.0/24	AS401606	Colorado Department of Transportation	CenturyLink Communications, LLC	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:       401606
ASName:         CDOT-ITS-01
ASHandle:       AS401606
RegDate:        2025-01-15
Updated:        2025-01-15    
Ref:            https://rdap.arin.net/registry/autnum/401606


OrgName:        Colorado Department of Transportation
OrgId:          CDT-63
Address:        425C Corporate Cir
City:           Golden
StateProv:      CO
PostalCode:     80401
Country:        US
RegDate:        2024-08-06
Updated:        2024-09-18
Ref:            https://rdap.arin.net/registry/entity/CDT-63


OrgAbuseHandle: CIN23-ARIN
OrgAbuseName:   CDOT ITS Network
OrgAbusePhone:  +1-303-512-5802 
OrgAbuseEmail:  cdot_its-networks@state.co.us
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CIN23-ARIN

OrgTechHandle: CIN23-ARIN
OrgTechName:   CDOT ITS Network
OrgTechPhone:  +1-303-512-5802 
OrgTechEmail:  cdot_its-networks@state.co.us
OrgTechRef:    https://rdap.arin.net/registry/entity/CIN23-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

Peers

AS Number	Description	Country
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS3356	Level 3 Parent, LLC	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US

Frequently Asked Questions

What is ASN AS401606?

ASN AS401606 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS401606?

AS401606 is listed under Colorado Department of Transportation.

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.