ASN AS40509 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS40509?

AS40509 is listed under Fly.io, 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?

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.

AS40509 Fly.io, Inc. | IPGeolocation.io

ASN Lookup Tool

Fly.io, Inc. fly.io

US 243 Routes

AS Data

AS40509

AS40509 – Fly.io, Inc.

AS Number	40509
AS Name	FLY
Organization	Fly.io, Inc. (flyio)
Country	US
Website	fly.io
Number of IPv4 Routes	175
Number of IPv6 Routes	68
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2017-12-20

ASN Intelligence API for production workflows

Use ASN data for AS40509 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
149.248.212.0/23	AS40509	Fly.io, Inc.	Fly.io, Inc.	512
209.71.88.0/24	AS40509	Fly.io, Inc.	Fly.io, Inc.	256
137.66.58.0/23	AS40509	Fly.io, Inc.	Fly.io, Inc.	512
137.66.28.0/23	AS40509	Fly.io, Inc.	Fly.io, Inc.	512
213.188.218.0/23	AS40509	Fly.io, Inc.	Fly.io, Inc	512
168.220.88.0/23	AS40509	Fly.io, Inc.	Fly.io, Inc.	512
37.16.18.0/23	AS40509	Fly.io, Inc.	Fly.io, Inc.	512
2a09:8280:e627::/48	AS40509	Fly.io, Inc.	Fly.io, Inc	~1×10²⁴
137.66.2.0/23	AS40509	Fly.io, Inc.	Fly.io, Inc.	512
137.66.16.0/23	AS40509	Fly.io, Inc.	Fly.io, Inc.	512

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:       40509
ASName:         FLY
ASHandle:       AS40509
RegDate:        2017-12-20
Updated:        2017-12-20
Ref:            https://rdap.arin.net/registry/autnum/40509


OrgName:        Fly.io, Inc.
OrgId:          FLYIO
Address:        2261 Market Street
City:           San Francisco
StateProv:      CA
PostalCode:     94114
Country:        US
RegDate:        2017-01-18
Updated:        2025-11-18
Ref:            https://rdap.arin.net/registry/entity/FLYIO


OrgTechHandle: FLYOP-ARIN
OrgTechName:   Fly Ops
OrgTechPhone:  +1-312-283-4377 
OrgTechEmail:  ops@fly.io
OrgTechRef:    https://rdap.arin.net/registry/entity/FLYOP-ARIN

OrgAbuseHandle: ABUSE8489-ARIN
OrgAbuseName:   Abuse
OrgAbusePhone:  +1-312-626-4490 
OrgAbuseEmail:  abuse@fly.io
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE8489-ARIN

OrgNOCHandle: FLYOP-ARIN
OrgNOCName:   Fly Ops
OrgNOCPhone:  +1-312-283-4377 
OrgNOCEmail:  ops@fly.io
OrgNOCRef:    https://rdap.arin.net/registry/entity/FLYOP-ARIN

OrgTechHandle: BERRY359-ARIN
OrgTechName:   Berryman, Steve 
OrgTechPhone:  +447886749129 
OrgTechEmail:  steve@fly.io
OrgTechRef:    https://rdap.arin.net/registry/entity/BERRY359-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" : "40509",
    "as_handle" : "AS40509",
    "as_name" : "FLY",
    "tech_contacts" : [ "FLYOP-ARIN", "BERRY359-ARIN" ],
    "abuse_contacts" : [ "ABUSE8489-ARIN" ],
    "date_created" : "2017-12-20",
    "date_updated" : "2017-12-20",
    "source" : "https://rdap.arin.net/registry/autnum/40509"
  } ],
  "organization" : {
    "handle" : "FLYIO",
    "name" : "Fly.io, Inc.",
    "address" : [ "2261 Market Street", "San Francisco", "CA", "94114", "US" ],
    "street" : "Market Street",
    "city" : "San Francisco",
    "state" : "CA",
    "zip_code" : "94114",
    "country" : [ "US" ],
    "date_created" : "2017-01-18",
    "date_updated" : "2025-11-18",
    "source" : "https://rdap.arin.net/registry/entity/FLYIO",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "FLYOP-ARIN",
    "name" : "Fly Ops",
    "email" : [ "ops@fly.io" ],
    "phone" : [ "+1-312-283-4377" ],
    "source" : "https://rdap.arin.net/registry/entity/FLYOP-ARIN"
  }, {
    "handle" : "BERRY359-ARIN",
    "name" : "Berryman, Steve",
    "email" : [ "steve@fly.io" ],
    "phone" : [ "+447886749129" ],
    "source" : "https://rdap.arin.net/registry/entity/BERRY359-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "ABUSE8489-ARIN",
    "name" : "Abuse",
    "email" : [ "abuse@fly.io" ],
    "phone" : [ "+1-312-626-4490" ],
    "source" : "https://rdap.arin.net/registry/entity/ABUSE8489-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS36236	NetActuate, Inc	US
AS30081	CacheFly	US

Upstreams

AS Number	Description	Country
AS36236	NetActuate, Inc	US
AS30081	CacheFly	US

Contacts

Email Contacts

ops@fly.io steve@fly.io

Abuse Contacts

abuse@fly.io