ASN AS12129 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS12129?

AS12129 is listed under 123.Net, 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.

AS12129 123.Net, Inc. | IPGeolocation.io

ASN Lookup Tool

123.Net, Inc. 123.net

US 62 Routes

AS Data

AS12129

AS12129 – 123.Net, Inc.

AS Number	12129
AS Name	123NET
Organization	123.Net, Inc.(netin-6)
Country	US
Website	123.net
Number of IPv4 Routes	55
Number of IPv6 Routes	7
ASN type	ISP
Registry	ARIN
Date Allocated	1999-03-30

ASN Intelligence API for production workflows

Use ASN data for AS12129 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
209.124.32.0/19	AS12129	123.Net, Inc.	123.Net, Inc.	8192
199.249.0.0/21	AS12129	123.Net, Inc.	123.Net, Inc.	2048
67.214.112.0/20	AS12129	123.Net, Inc.	Ancor Information Management	4096
207.91.200.0/21	AS12129	123.Net, Inc.	MascoTech	2048
205.251.176.0/20	AS12129	123.Net, Inc.	123.Net, Inc.	4096
2606:6680:30::/48	AS12129	123.Net, Inc.	SmartHost LLC	~1×10²⁴
2607:f790:e000::/36	AS12129	123.Net, Inc.	123.Net, Inc.	~5×10²⁷
199.231.52.0/22	AS12129	123.Net, Inc.	123.Net, Inc.	1024
204.106.17.0/24	AS12129	123.Net, Inc.	Altarum Institute	256
192.96.208.0/20	AS12129	123.Net, Inc.	Sectorlink, L.L.C.	4096

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:       12129
ASName:         123NET
ASHandle:       AS12129
RegDate:        1999-03-30
Updated:        2012-03-02    
Ref:            https://rdap.arin.net/registry/autnum/12129


OrgName:        123.Net, Inc.
OrgId:          NETIN-6
Address:        24700 Northwestern Hwy. STE 700
City:           Southfield
StateProv:      MI
PostalCode:     48075
Country:        US
RegDate:        2010-11-19
Updated:        2017-01-28
Comment:        Direct Abuse: +1.248.228.8200 or abuse@123.net
Ref:            https://rdap.arin.net/registry/entity/NETIN-6


OrgNOCHandle: RD1464-ARIN
OrgNOCName:   Duda, Ryan 
OrgNOCPhone:  +1-248-228-8200 
OrgNOCEmail:  rpd@123.net
OrgNOCRef:    https://rdap.arin.net/registry/entity/RD1464-ARIN

OrgTechHandle: JNO80-ARIN
OrgTechName:   Nowlan, James 
OrgTechPhone:  +1-248-228-8200 
OrgTechEmail:  jnowlan@123.net
OrgTechRef:    https://rdap.arin.net/registry/entity/JNO80-ARIN

OrgTechHandle: RD1464-ARIN
OrgTechName:   Duda, Ryan 
OrgTechPhone:  +1-248-228-8200 
OrgTechEmail:  rpd@123.net
OrgTechRef:    https://rdap.arin.net/registry/entity/RD1464-ARIN

OrgAbuseHandle: RD1464-ARIN
OrgAbuseName:   Duda, Ryan 
OrgAbusePhone:  +1-248-228-8200 
OrgAbuseEmail:  rpd@123.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/RD1464-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
AS20115	Charter Communications LLC	US
AS2906	Netflix Streaming Services Inc.	US
AS393665	Baker College	US
AS6614	T-Mobile USA, Inc.	US
AS286	GTT Communications Inc.	US
AS13549	Mercury Network Corporation	US
AS26479	Point Broadband Fiber Holding, LLC	US
AS14537	Continent 8 LLC	US
AS46569	Walsh College of Accountancy and Business Administration	US
AS8781	Ooredoo Q.S.C.	QA

Upstreams

AS Number	Description	Country
AS11115	Otava, LLC	US
AS6453	TATA COMMUNICATIONS AMERICA INC	US
AS36394	Grid4 Communications, Inc	US
AS6939	Hurricane Electric LLC	US
AS8359	MTS PJSC	RU
AS286	GTT Communications Inc.	US
AS8966	EMIRATES TELECOMMUNICATIONS GROUP COMPANY ETISALAT GROUP PJSC	AE
AS2914	NTT America, Inc.	US
AS174	Cogent Communications, LLC	US
AS6327	Shaw Communications	CA

Downstreams

AS Number	Description	Country
AS401313	Novacoast Inc	US
AS215129	Wodarek Productions LLC	US
AS393665	Baker College	US
AS13549	Mercury Network Corporation	US
AS3389	Ford Motor Company	US
AS14537	Continent 8 LLC	US
AS46569	Walsh College of Accountancy and Business Administration	US
AS394289	Hope College	US
AS40089	Bullhorn Inc.	US
AS12088	North American Bancard, LLC	US