ASN AS3967 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS3967?

AS3967 is listed under Nationstar Mortgage, LLC.

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.

AS3967 Nationstar Mortgage, LLC

ASN Lookup Tool

Nationstar Mortgage, LLC mrcooper.com

US 2 Routes

AS Data

AS3967

AS3967 – Nationstar Mortgage, LLC

AS Number	3967
AS Name	NSM350
Organization	Nationstar Mortgage, LLC(nml-31)
Country	US
Website	mrcooper.com
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2012-09-19

ASN Intelligence API for production workflows

Use ASN data for AS3967 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

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
198.72.79.0/24	AS3967	Nationstar Mortgage, LLC	Nationstar Mortgage, LLC	256
198.72.78.0/24	AS3967	Nationstar Mortgage, LLC	Nationstar Mortgage, LLC	256

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:       3967
ASName:         NSM350
ASHandle:       AS3967
RegDate:        2012-09-19
Updated:        2014-05-14    
Ref:            https://rdap.arin.net/registry/autnum/3967


OrgName:        Nationstar Mortgage, LLC
OrgId:          NML-31
Address:        8950 Cypress Waters Blvd
City:           Dallas
StateProv:      TX
PostalCode:     75019
Country:        US
RegDate:        2012-08-13
Updated:        2018-08-08
Ref:            https://rdap.arin.net/registry/entity/NML-31


OrgAbuseHandle: GOLDS189-ARIN
OrgAbuseName:   Goldstein, Robert 
OrgAbusePhone:  +1-214-687-4393 
OrgAbuseEmail:  robert.goldstein@mrcooper.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/GOLDS189-ARIN

OrgNOCHandle: NETWO6951-ARIN
OrgNOCName:   Network Support
OrgNOCPhone:  +1-469-240-4700 
OrgNOCEmail:  neteng@mrcooper.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NETWO6951-ARIN

OrgTechHandle: NETWO6951-ARIN
OrgTechName:   Network Support
OrgTechPhone:  +1-469-240-4700 
OrgTechEmail:  neteng@mrcooper.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NETWO6951-ARIN

OrgAbuseHandle: NETWO6951-ARIN
OrgAbuseName:   Network Support
OrgAbusePhone:  +1-469-240-4700 
OrgAbuseEmail:  neteng@mrcooper.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NETWO6951-ARIN

OrgNOCHandle: GOLDS189-ARIN
OrgNOCName:   Goldstein, Robert 
OrgNOCPhone:  +1-214-687-4393 
OrgNOCEmail:  robert.goldstein@mrcooper.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/GOLDS189-ARIN

OrgTechHandle: GOLDS189-ARIN
OrgTechName:   Goldstein, Robert 
OrgTechPhone:  +1-214-687-4393 
OrgTechEmail:  robert.goldstein@mrcooper.com
OrgTechRef:    https://rdap.arin.net/registry/entity/GOLDS189-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

Upstreams

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