ASN AS20203 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS20203?

AS20203 is listed under First Financial Bank NA.

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.

AS20203 First Financial Bank NA

ASN Lookup Tool

First Financial Bank NA first-online.com

US 2 Routes

AS Data

AS20203

AS20203 – First Financial Bank NA

AS Number	20203
AS Name	FIRST-FINANCIAL-BANK-NA
Organization	First Financial Bank NA(ffbn-6)
Country	US
Website	first-online.com
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2017-09-18

ASN Intelligence API for production workflows

Use ASN data for AS20203 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

Get ASN API Key ASN API Docs

IP Ranges

Route	Origin	Origin Name	ISP	# IPs
66.163.217.0/24	AS20203	First Financial Bank NA	First Financial Bank NA	256
205.167.96.0/24	AS20203	First Financial Bank NA	First Financial Bank NA	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:       20203
ASName:         FIRST-FINANCIAL-BANK-NA
ASHandle:       AS20203
RegDate:        2017-09-18
Updated:        2017-09-18    
Ref:            https://rdap.arin.net/registry/autnum/20203


OrgName:        First Financial Bank NA
OrgId:          FFBN-6
Address:        PO Box 2122
City:           Terre Haute
StateProv:      IN
PostalCode:     47802
Country:        US
RegDate:        2017-09-13
Updated:        2020-06-03
Ref:            https://rdap.arin.net/registry/entity/FFBN-6


OrgAbuseHandle: ABUSE6388-ARIN
OrgAbuseName:   Abuse
OrgAbusePhone:  +1-812-238-6000 
OrgAbuseEmail:  abuse@first-online.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE6388-ARIN

OrgNOCHandle: FFBN1-ARIN
OrgNOCName:   First Financial Bank NA
OrgNOCPhone:  +1-812-238-6000 
OrgNOCEmail:  netsupport@first-online.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/FFBN1-ARIN

OrgTechHandle: FFBN1-ARIN
OrgTechName:   First Financial Bank NA
OrgTechPhone:  +1-812-238-6000 
OrgTechEmail:  netsupport@first-online.com
OrgTechRef:    https://rdap.arin.net/registry/entity/FFBN1-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
AS5742	Fidium	US
AS7018	AT&T Enterprises, LLC	US
AS13807	Great Plains Communications LLC	US
AS32709	Joink, LLC	US
AS13649	Flexential Colorado Corp.	US

Upstreams

AS Number	Description	Country
AS5742	Fidium	US
AS7018	AT&T Enterprises, LLC	US
AS13807	Great Plains Communications LLC	US
AS32709	Joink, LLC	US
AS13649	Flexential Colorado Corp.	US

Contacts

Email Contacts

netsupport@first-online.com

Abuse Contacts

abuse@first-online.com