ASN AS19 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS19?

AS19 is listed under Leidos, 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.

AS19 Leidos, Inc. | IPGeolocation.io

ASN Lookup Tool

Leidos, Inc. leidos.com

US 27 Routes

AS Data

AS19

AS19 – Leidos, Inc.

AS Number	19
AS Name	LEIDOS-AS
Organization	Leidos, Inc.(leido)
Country	US
Website	leidos.com
Number of IPv4 Routes	24
Number of IPv6 Routes	3
ASN type	BUSINESS
Registry	ARIN
Date Allocated	1984-07-27

ASN Intelligence API for production workflows

Use ASN data for AS19 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
149.8.186.0/24	AS19	Leidos, Inc.	Leidos, Inc.	256
140.162.15.0/24	AS19	Leidos, Inc.	Leidos, Inc.	256
140.162.8.0/23	AS19	Leidos, Inc.	Leidos, Inc.	512
140.162.48.0/22	AS19	Leidos, Inc.	Leidos, Inc.	1024
149.8.0.0/16	AS19	Leidos, Inc.	Leidos, Inc.	65536
205.153.240.0/22	AS19	Leidos, Inc.	Leidos Holdings, Inc.	1024
140.162.10.0/23	AS19	Leidos, Inc.	Leidos, Inc.	512
140.162.192.0/18	AS19	Leidos, Inc.	Leidos, Inc.	16384
140.162.0.0/16	AS19	Leidos, Inc.	Leidos, Inc.	65536
149.8.0.0/17	AS19	Leidos, Inc.	Leidos, Inc.	32768

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:       19
ASName:         LEIDOS-AS
ASHandle:       AS19
RegDate:        1984-07-27
Updated:        2026-03-05    
Ref:            https://rdap.arin.net/registry/autnum/19


OrgName:        Leidos, Inc.
OrgId:          LEIDO
Address:        1750 Presidents Street
City:           Reston
StateProv:      VA
PostalCode:     20190
Country:        US
RegDate:        2013-10-31
Updated:        2026-02-12
Ref:            https://rdap.arin.net/registry/entity/LEIDO


OrgAbuseHandle: LEIDO-ARIN
OrgAbuseName:   Leidos NOC
OrgAbusePhone:  +1-571-526-6640 
OrgAbuseEmail:  L_Network-Operations@Leidos.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/LEIDO-ARIN

OrgTechHandle: MAJ32-ARIN
OrgTechName:   Jenkins, Michael A.
OrgTechPhone:  +1-407-243-2984 
OrgTechEmail:  michael.a.jenkins-2@leidos.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MAJ32-ARIN

RTechHandle: LNE68-ARIN
RTechName:   Leidos Network Engineering
RTechPhone:  +1-855-953-4367 
RTechEmail:  L_neteng1@leidos.com
RTechRef:    https://rdap.arin.net/registry/entity/LNE68-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
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS62	CyrusOne LLC	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US
AS62	CyrusOne LLC	US