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

ASN Lookup Tool

Railway railway.app

US 14 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	8
Number of IPv6 Routes	6
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.

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
2607:99c0:200::/40	AS400940	Railway	Railway	~309×10²⁴
2607:99c0:300::/40	AS400940	Railway	Railway	~309×10²⁴
152.55.176.0/22	AS81	MCNC	Railway	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
2607:99c0:900::/40	AS0		Railway	~309×10²⁴
2607:99c0:800::/40	AS0		Railway	~309×10²⁴
66.33.22.0/23	AS400940	Railway	Railway	512
208.77.246.0/23	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


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

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

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

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

OrgAbuseHandle: ABUSE8954-ARIN
OrgAbuseName:   Abuse-Role
OrgAbusePhone:  +1-415-707-7675 
OrgAbuseEmail:  abuse@railway.app
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE8954-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
AS7195	EDGEUNO S.A.S	CO
AS64049	Reliance Jio Infocomm Pte Ltd Singapore	SG
AS262589	SAMM TECNOLOGIA E TELECOMUNICACOES S.A	BR
AS63956	5G NETWORK OPERATIONS PTY LTD	AU
AS3737	PenTeleData Inc.	US
AS6939	Hurricane Electric LLC	US
AS38880	Micron21 Datacentre Pty Ltd	AU
AS4637	Telstra Global	HK
AS14537	Continent 8 LLC	US
AS45352	IP ServerOne Solutions Sdn Bhd	MY

Upstreams

AS Number	Description	Country
AS7195	EDGEUNO S.A.S	CO
AS6939	Hurricane Electric LLC	US
AS6057	Administracion Nacional de Telecomunicaciones	UY
AS2914	NTT America, Inc.	US
AS17557	Pakistan Telecommunication Company Limited	PK
AS37468	Angola Cables	AO
AS13335	Cloudflare, Inc.	US
AS60171	AFR IX TELECOM S.A.	ES
AS1299	Arelion Sweden AB	SE
AS3491	PCCW Global HK Limited	HK