ASN AS4889 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS4889?

AS4889 is listed under United States Postal Service Office of Inspector General.

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.

AS4889 United States Postal Service Office of Inspector General

ASN Lookup Tool

United States Postal Service Office of Inspector General uspsoig.gov

US 3 Routes

AS Data

AS4889

AS4889 – United States Postal Service Office of Inspector General

AS Number	4889
AS Name	USPSOIG-AS2
Organization	United States Postal Service Office of Inspector General(unite-327)
Country	US
Website	uspsoig.gov
Number of IPv4 Routes	3
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	2009-09-23

ASN Intelligence API for production workflows

Use ASN data for AS4889 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
192.154.124.0/23	AS4889	United States Postal Service Office of Inspector General	United States Postal Service Office of Inspector General	512
192.154.124.0/24	AS4889	United States Postal Service Office of Inspector General	United States Postal Service Office of Inspector General	256
192.154.125.0/24	AS4889	United States Postal Service Office of Inspector General	United States Postal Service Office of Inspector General	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:       4889
ASName:         USPSOIG-AS2
ASHandle:       AS4889
RegDate:        2009-09-23
Updated:        2012-03-02    
Ref:            https://rdap.arin.net/registry/autnum/4889


OrgName:        United States Postal Service Office of Inspector General
OrgId:          UNITE-327
Address:        1735 N. Lynn Street
City:           Arlington
StateProv:      VA
PostalCode:     22209-2020
Country:        US
RegDate:        2009-08-17
Updated:        2011-09-24
Ref:            https://rdap.arin.net/registry/entity/UNITE-327


OrgTechHandle: NOG15-ARIN
OrgTechName:   Network Operations Group
OrgTechPhone:  +1-703-248-2148 
OrgTechEmail:  jwilson@uspsoig.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/NOG15-ARIN

OrgAbuseHandle: NOG15-ARIN
OrgAbuseName:   Network Operations Group
OrgAbusePhone:  +1-703-248-2148 
OrgAbuseEmail:  jwilson@uspsoig.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NOG15-ARIN

RTechHandle: NOG15-ARIN
RTechName:   Network Operations Group
RTechPhone:  +1-703-248-2148 
RTechEmail:  jwilson@uspsoig.gov
RTechRef:    https://rdap.arin.net/registry/entity/NOG15-ARIN

RNOCHandle: NOG15-ARIN
RNOCName:   Network Operations Group
RNOCPhone:  +1-703-248-2148 
RNOCEmail:  jwilson@uspsoig.gov
RNOCRef:    https://rdap.arin.net/registry/entity/NOG15-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
AS1239	Cogent Communications, LLC	US
AS286	GTT Communications Inc.	NL
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS286	GTT Communications Inc.	US
AS3257	GTT Communications Inc.	US
AS174	Cogent Communications, LLC	US