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.

AS27603 Spirit Airlines, Inc.

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

Spirit Airlines, Inc. spirit.com

US 1 Routes

AS Data

AS27603

AS27603 – Spirit Airlines, Inc.

AS Number	27603
AS Name	SPIRITAIR
Organization	Spirit Airlines, Inc.(spirit-4)
Country	US
Website	spirit.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2003-04-08

ASN Intelligence API for production workflows

Use ASN data for AS27603 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
198.245.173.0/24	AS27603	Spirit Airlines, Inc.	SPIRIT AIRLINES 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:       27603
ASName:         SPIRITAIR
ASHandle:       AS27603
RegDate:        2003-04-08
Updated:        2018-11-09    
Ref:            https://rdap.arin.net/registry/autnum/27603


OrgName:        Spirit Airlines, Inc.
OrgId:          SPIRIT-4
Address:        2800 Executive Way 
City:           Miramar
StateProv:      FL
PostalCode:     33025
Country:        US
RegDate:        1998-06-30
Updated:        2022-10-05
Ref:            https://rdap.arin.net/registry/entity/SPIRIT-4


OrgAbuseHandle: ARINM6-ARIN
OrgAbuseName:   Arin Management 
OrgAbusePhone:  +1-561-680-1271 
OrgAbuseEmail:  peter.hoo@spirit.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ARINM6-ARIN

OrgNOCHandle: ARINM6-ARIN
OrgNOCName:   Arin Management 
OrgNOCPhone:  +1-561-680-1271 
OrgNOCEmail:  peter.hoo@spirit.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ARINM6-ARIN

OrgTechHandle: ARINM6-ARIN
OrgTechName:   Arin Management 
OrgTechPhone:  +1-561-680-1271 
OrgTechEmail:  peter.hoo@spirit.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ARINM6-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
AS32787	Akamai Technologies, Inc.	US

Upstreams

AS Number	Description	Country
AS32787	Akamai Technologies, Inc.	US

Frequently Asked Questions

What is ASN AS27603?

ASN AS27603 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS27603?

AS27603 is listed under Spirit Airlines, Inc..

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.