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AS21645 American Dental Association

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

American Dental Association ada.org

US 1 Routes

AS Data

AS21645

AS21645 – American Dental Association

AS Number	21645
AS Name	ADA-CHICAGO
Organization	American Dental Association(ada-4)
Country	US
Website	ada.org
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2020-02-19

ASN Intelligence API for production workflows

Use ASN data for AS21645 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
64.145.66.0/24	AS21645	American Dental Association	American Dental Association	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:       21645
ASName:         ADA-CHICAGO
ASHandle:       AS21645
RegDate:        2020-02-19
Updated:        2020-02-19    
Ref:            https://rdap.arin.net/registry/autnum/21645


OrgName:        American Dental Association
OrgId:          ADA-4
Address:        211 E. Chicago Avenue
City:           Chicago
StateProv:      IL
PostalCode:     60611-2678
Country:        US
RegDate:        1997-01-15
Updated:        2021-05-14
Ref:            https://rdap.arin.net/registry/entity/ADA-4


OrgTechHandle: OVALL12-ARIN
OrgTechName:   Ovalle, Freddy 
OrgTechPhone:  +1-312-440-2500 
OrgTechEmail:  ovallef@ada.org
OrgTechRef:    https://rdap.arin.net/registry/entity/OVALL12-ARIN

OrgTechHandle: TIEFE2-ARIN
OrgTechName:   Tiefenthaler, Mike 
OrgTechPhone:  +1-312-440-2500 
OrgTechEmail:  tiefenthalerm@ada.org
OrgTechRef:    https://rdap.arin.net/registry/entity/TIEFE2-ARIN

OrgAbuseHandle: OVALL12-ARIN
OrgAbuseName:   Ovalle, Freddy 
OrgAbusePhone:  +1-312-440-2500 
OrgAbuseEmail:  ovallef@ada.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/OVALL12-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
AS46887	Crown Castle Fiber LLC	US
AS10753	Level 3 Parent, LLC	US

Upstreams

AS Number	Description	Country
AS46887	Crown Castle Fiber LLC	US
AS10753	Level 3 Parent, LLC	US

Frequently Asked Questions

What is ASN AS21645?

ASN AS21645 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21645?

AS21645 is listed under American Dental Association.

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.