What is ASN AS400940?

ASN AS400940 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS400940?

AS400940 is listed under Railway.

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.

AS400940 Railway | IPGeolocation.io

Railway railway.app

US 20 Routes

AS Data

AS400940

AS400940 – Railway

AS Number	400940
AS Name	RAILWAY
Organization	Railway (rc-1550)
Country	US
Website	railway.app
Number of IPv4 Routes	12
Number of IPv6 Routes	8
ASN type	ISP
Registry	ARIN
Date Allocated	2024-02-17

ASN Intelligence API for production workflows

Use ASN data for AS400940 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2607:99c0:200::/40	AS400940	Railway	Railway	~309×10²⁴
2607:99c0:300::/40	AS400940	Railway	Railway	~309×10²⁴
152.55.180.0/22	AS400940	Railway	Railway	1024
2607:99c0:c00::/40	AS0		Railway	~309×10²⁴
2607:99c0:800::/40	AS400940	Railway	Railway	~309×10²⁴
2607:99c0:900::/40	AS400940	Railway	Railway	~309×10²⁴
66.33.23.0/24	AS400940	Railway	Railway	256
162.220.234.0/23	AS400940	Railway	Railway	512
162.220.232.0/23	AS400940	Railway	Railway	512
152.55.184.0/22	AS400940	Railway	Railway	1024
152.55.176.0/22	AS400940	Railway	Railway	1024
152.55.188.0/22	AS81	MCNC	Railway	1024
69.46.46.0/24	AS400940	Railway	Railway	256
66.33.22.0/23	AS400940	Railway	Railway	512
208.77.246.0/23	AS400940	Railway	Railway	512
153.52.224.0/23	AS400940	Railway	Railway	512
2607:99c0:a00::/40	AS400940	Railway	Railway	~309×10²⁴
2607:99c0::/40	AS400940	Railway	Railway	~309×10²⁴
2607:99c0:100::/40	AS400940	Railway	Railway	~309×10²⁴
208.77.244.0/23	AS400940	Railway	Railway	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:       400940
ASName:         RAILWAY
ASHandle:       AS400940
RegDate:        2024-02-17
Updated:        2024-11-07
Comment:        https://railway.com
Ref:            https://rdap.arin.net/registry/autnum/400940


OrgName:        Railway
OrgId:          RC-1550
Address:        548 Market St
Address:        PMB 68956
City:           San Francisco
StateProv:      CA
PostalCode:     94104
Country:        US
RegDate:        2023-10-18
Updated:        2024-11-04
Comment:        https://railway.com
Ref:            https://rdap.arin.net/registry/entity/RC-1550


OrgAbuseHandle: ABUSE8954-ARIN
OrgAbuseName:   Abuse-Role
OrgAbusePhone:  +1-415-707-7675 
OrgAbuseEmail:  abuse@railway.app
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE8954-ARIN

OrgRoutingHandle: RAILW-ARIN
OrgRoutingName:   Railway-Team
OrgRoutingPhone:  +1-415-707-7675 
OrgRoutingEmail:  dc-ops@railway.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/RAILW-ARIN

OrgNOCHandle: RAILW-ARIN
OrgNOCName:   Railway-Team
OrgNOCPhone:  +1-415-707-7675 
OrgNOCEmail:  dc-ops@railway.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/RAILW-ARIN

OrgDNSHandle: RAILW-ARIN
OrgDNSName:   Railway-Team
OrgDNSPhone:  +1-415-707-7675 
OrgDNSEmail:  dc-ops@railway.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/RAILW-ARIN

OrgTechHandle: RAILW-ARIN
OrgTechName:   Railway-Team
OrgTechPhone:  +1-415-707-7675 
OrgTechEmail:  dc-ops@railway.com
OrgTechRef:    https://rdap.arin.net/registry/entity/RAILW-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" : "400940",
    "as_handle" : "AS400940",
    "as_name" : "RAILWAY",
    "admin_contacts" : [ "RAILW-ARIN" ],
    "tech_contacts" : [ "RAILW-ARIN", "RAILW-ARIN" ],
    "abuse_contacts" : [ "ABUSE8954-ARIN" ],
    "date_created" : "2024-02-17",
    "date_updated" : "2024-11-07",
    "source" : "https://rdap.arin.net/registry/autnum/400940"
  } ],
  "organization" : {
    "handle" : "RC-1550",
    "name" : "Railway",
    "address" : [ "548 Market St", "PMB 68956", "San Francisco", "CA", "94104", "US" ],
    "street" : "Market St",
    "city" : "San Francisco",
    "state" : "CA",
    "zip_code" : "94104",
    "country" : [ "US" ],
    "date_created" : "2023-10-18",
    "date_updated" : "2024-11-04",
    "source" : "https://rdap.arin.net/registry/entity/RC-1550",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "RAILW-ARIN",
    "name" : "Railway-Team",
    "email" : [ "dc-ops@railway.com" ],
    "phone" : [ "+1-415-707-7675" ],
    "source" : "https://rdap.arin.net/registry/entity/RAILW-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "RAILW-ARIN",
    "name" : "Railway-Team",
    "email" : [ "dc-ops@railway.com" ],
    "phone" : [ "+1-415-707-7675" ],
    "source" : "https://rdap.arin.net/registry/entity/RAILW-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "ABUSE8954-ARIN",
    "name" : "Abuse-Role",
    "email" : [ "abuse@railway.app" ],
    "phone" : [ "+1-415-707-7675" ],
    "source" : "https://rdap.arin.net/registry/entity/ABUSE8954-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS9299	Philippine Long Distance Telephone Co.	PH
AS7195	EDGEUNO S.A.S	CO
AS9498	Bharti Airtel Limited	IN
AS64049	Reliance Jio Infocomm Pte Ltd Singapore	SG
AS262589	SAMM TECNOLOGIA E TELECOMUNICACOES S.A	BR
AS3737	PenTeleData Inc.	US
AS138840	PT. PARSAORAN GLOBAL DATATRANS NAP	ID
AS6204	ZET.NET IP Transit	RO
AS6939	Hurricane Electric LLC	US
AS38880	Micron21 Datacentre Pty Ltd	AU
AS8966	EMIRATES TELECOMMUNICATIONS GROUP COMPANY ETISALAT GROUP PJSC	AE
AS14537	Continent 8 LLC	US
AS45352	IP ServerOne Solutions Sdn Bhd	MY
AS17557	Pakistan Telecommunication Company Limited	PK
AS37468	Angola Cables	AO
AS14907	Wikimedia Foundation Inc.	US
AS58511	Anycast Holdings Pty Ltd	AU
AS15802	Emirates Integrated Telecommunications Company PJSC	AE
AS11039	The George Washington University	US
AS45629	JasTel Network Company Limited	TH
AS51185	MainStreaming SpA	IT
AS6461	Zayo Bandwidth	US
AS10099	China Unicom Hong Kong Operations Limited	HK
AS16552	Tiggee LLC	US
AS398465	Rackdog, LLC	US
AS8220	COLT Technology Services Group Limited	GB
AS37721	Virtual Technologies & Solutions	BF
AS45489	Sri Lanka Telecom Ltd	LK
AS58495	PT Parsaoran Global Datatrans	ID
AS9583	Sify Limited	IN
AS32590	Valve Corporation	US
AS57463	NetIX Communications JSC	BG
AS58717	Summit Communications Limited	BD
AS399337	Netcrawler Inc	CA
AS38082	True International Gateway Co., Ltd.	TH
AS63516	Transhybrid Internet Xchange	ID
AS138128	PT Solnet Indonesia	ID
AS45701	PT Internet Madju Abad Milenindo	ID
AS1299	Arelion Sweden AB	SE
AS1828	Unitas Global	US
AS141137	Internet Service Provider / Member IDNIC	ID
AS38001	NewMedia Express Pte Ltd	SG
AS136106	PT. Mega Akses Persada	ID
AS24482	SG.GS	SG
AS56258	Corporate / Direct Member IDNIC	ID
AS57695	Misaka Network, Inc.	US
AS24516	Virtutel Pty Ltd	AU
AS52320	GlobeNet Cabos Submarinos Colombia, S.A.S.	CO
AS63927	RISE ASIA TECHNOLOGY LIMITED	PH
AS7713	Telekomunikasi Indonesia PT	ID
AS2914	NTT America, Inc.	US
AS33891	Core Backbone GmbH	DE
AS132337	AXCLUSIVE PTE. LTD.	SG
AS45430	SBN IIG/AWN IIG transit provider	TH
AS8529	Zain Omantel International FZ LLC	AE
AS135607	Infinivan Inc.	PH
AS60171	AFR IX TELECOM S.A.	ES
AS36236	NetActuate, Inc	US
AS16276	OVH SAS	FR
AS4455	IX Reach Ltd	GB

Upstreams

AS Number	Description	Country
AS60068	Datacamp Limited	GB
AS7195	EDGEUNO S.A.S	CO
AS9583	Sify Limited	IN
AS6204	ZET.NET IP Transit	RO
AS6939	Hurricane Electric LLC	US
AS6057	Administracion Nacional de Telecomunicaciones	UY
AS2914	NTT America, Inc.	US
AS33891	Core Backbone GmbH	DE
AS37468	Angola Cables	AO
AS13335	Cloudflare, Inc.	US
AS13786	Seabras 1 USA, LLC	US
AS60171	AFR IX TELECOM S.A.	ES
AS15802	Emirates Integrated Telecommunications Company PJSC	AE
AS1299	Arelion Sweden AB	SE
AS3491	PCCW Global HK Limited	HK
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS137409	GSL Networks Pty LTD	AU