What is ASN AS397496?

ASN AS397496 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS397496?

AS397496 is listed under Inmarsat Government.

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.

AS397496 Inmarsat Government | IPGeolocation.io

ASN Lookup Tool

Inmarsat Government inmarsatgov.com

US 1 Routes

AS Data

AS397496

AS397496 – Inmarsat Government

AS Number	397496
AS Name	INMARSAT-GOVERNMENT-2
Organization	Inmarsat Government (segov-2)
Country	US
Website	inmarsatgov.com
Number of IPv4 Routes	0
Number of IPv6 Routes	1
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	2019-04-23

ASN Intelligence API for production workflows

Use ASN data for AS397496 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
2001:550:1b0a::/48	AS397496	Inmarsat Government	Inmarsat Commercial Services, Inc.	~1×10²⁴

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:       397496
ASName:         INMARSAT-GOVERNMENT-2
ASHandle:       AS397496
RegDate:        2019-04-23
Updated:        2026-06-25
Ref:            https://rdap.arin.net/registry/autnum/397496


OrgName:        Inmarsat Government
OrgId:          SEGOV-2
Address:        11600 Sunrise Valley Dr Suite 200
City:           Reston
StateProv:      VA
PostalCode:     20191
Country:        US
RegDate:        2015-12-22
Updated:        2026-06-25
Comment:        www.inmarsatgov.com
Ref:            https://rdap.arin.net/registry/entity/SEGOV-2


OrgNOCHandle: WEBMA428-ARIN
OrgNOCName:   Webmaster
OrgNOCPhone:  +1-703-621-6450 
OrgNOCEmail:  webmaster@inmarsatgov.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/WEBMA428-ARIN

OrgDNSHandle: WEBMA428-ARIN
OrgDNSName:   Webmaster
OrgDNSPhone:  +1-703-621-6450 
OrgDNSEmail:  webmaster@inmarsatgov.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/WEBMA428-ARIN

OrgRoutingHandle: WEBMA428-ARIN
OrgRoutingName:   Webmaster
OrgRoutingPhone:  +1-703-621-6450 
OrgRoutingEmail:  webmaster@inmarsatgov.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/WEBMA428-ARIN

OrgAbuseHandle: WEBMA428-ARIN
OrgAbuseName:   Webmaster
OrgAbusePhone:  +1-703-621-6450 
OrgAbuseEmail:  webmaster@inmarsatgov.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/WEBMA428-ARIN

OrgTechHandle: WEBMA428-ARIN
OrgTechName:   Webmaster
OrgTechPhone:  +1-703-621-6450 
OrgTechEmail:  webmaster@inmarsatgov.com
OrgTechRef:    https://rdap.arin.net/registry/entity/WEBMA428-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" : "397496",
    "as_handle" : "AS397496",
    "as_name" : "INMARSAT-GOVERNMENT-2",
    "admin_contacts" : [ "WEBMA428-ARIN" ],
    "tech_contacts" : [ "WEBMA428-ARIN", "WEBMA428-ARIN" ],
    "abuse_contacts" : [ "WEBMA428-ARIN" ],
    "date_created" : "2019-04-23",
    "date_updated" : "2026-06-25",
    "source" : "https://rdap.arin.net/registry/autnum/397496"
  } ],
  "organization" : {
    "handle" : "SEGOV-2",
    "name" : "Inmarsat Government",
    "address" : [ "11600 Sunrise Valley Dr Suite 200", "Reston", "VA", "20191", "US" ],
    "street" : "Sunrise Valley Dr",
    "city" : "Reston",
    "state" : "VA",
    "zip_code" : "20191",
    "country" : [ "US" ],
    "date_created" : "2015-12-22",
    "date_updated" : "2026-06-25",
    "source" : "https://rdap.arin.net/registry/entity/SEGOV-2",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "WEBMA428-ARIN",
    "name" : "Webmaster",
    "email" : [ "webmaster@inmarsatgov.com" ],
    "phone" : [ "+1-703-621-6450" ],
    "source" : "https://rdap.arin.net/registry/entity/WEBMA428-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "WEBMA428-ARIN",
    "name" : "Webmaster",
    "email" : [ "webmaster@inmarsatgov.com" ],
    "phone" : [ "+1-703-621-6450" ],
    "source" : "https://rdap.arin.net/registry/entity/WEBMA428-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "WEBMA428-ARIN",
    "name" : "Webmaster",
    "email" : [ "webmaster@inmarsatgov.com" ],
    "phone" : [ "+1-703-621-6450" ],
    "source" : "https://rdap.arin.net/registry/entity/WEBMA428-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS31753	Inmarsat Government	US
AS1239	Cogent Communications, LLC	US
AS47973	Digital Realty Netherlands B.V.	NL
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS47973	Digital Realty Netherlands B.V.	NL
AS174	Cogent Communications, LLC	US

Downstreams

AS Number	Description	Country
AS31753	Inmarsat Government	US

Legacy Routes

74.84.59.0/24 74.84.54.0/24 74.84.57.0/24