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.

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AS12129 123.Net, Inc. | IPGeolocation.io

123.Net, Inc. 123.net

US 61 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	6
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.

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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
181.214.238.0/23	AS12129	123.Net, Inc.	123.Net, Inc.	512
74.126.12.0/24	AS12129	123.Net, Inc.	EXEDigital	256
216.150.224.0/20	AS12129	123.Net, Inc.	123.Net, Inc.	4096
198.153.129.0/24	AS12129	123.Net, Inc.	Marketing Force	256
204.232.80.0/20	AS12129	123.Net, Inc.	Access Interactive	4096
198.3.46.0/24	AS12129	123.Net, Inc.	National Center for Manufacturing Sciences	256
208.86.112.0/24	AS12129	123.Net, Inc.	NetOne, Inc	256
69.54.69.0/24	AS12129	123.Net, Inc.	CallTower, Inc.	256
152.160.140.0/22	AS12129	123.Net, Inc.	2020 Communications LLC	1024
206.168.80.0/24	AS12129	123.Net, Inc.	Dash Cloud	256
198.3.45.0/24	AS12129	123.Net, Inc.	National Center for Manufacturing Sciences	256
69.39.64.0/19	AS12129	123.Net, Inc.	SYNERGY BROADBAND	8192
205.137.160.0/24	AS12129	123.Net, Inc.	Flint Group Incorporated	256
66.51.144.0/20	AS12129	123.Net, Inc.	123.Net, Inc.	4096
152.160.110.0/24	AS12129	123.Net, Inc.	InterConnect of Ann Arbor	256
207.91.232.0/21	AS12129	123.Net, Inc.	123.Net, Inc.	2048
69.54.68.0/24	AS12129	123.Net, Inc.	Appia Communications	256
209.124.52.0/23	AS12129	123.Net, Inc.	Detroit Internet Exchange DIX	512
69.87.152.0/24	AS12129	123.Net, Inc.	The Iserv Company, LLC	256
130.51.212.0/22	AS12129	123.Net, Inc.	Point Broadband Fiber Holding, LLC	1024
37.221.109.0/24	AS12129	123.Net, Inc.	123.Net, Inc.	256
198.3.44.0/24	AS12129	123.Net, Inc.	National Center for Manufacturing Sciences	256
152.160.184.0/21	AS12129	123.Net, Inc.	Vergennes Broadband	2048
130.44.28.0/22	AS12129	123.Net, Inc.	Xpert Technologies, Inc.	1024
152.160.128.0/18	AS12129	123.Net, Inc.	Webster Internet Services	16384
199.33.234.0/23	AS12129	123.Net, Inc.	Marketing Force	512
2620:11f:7008::/48	AS12129	123.Net, Inc.	Interconnecx, LLC	~1×10²⁴
199.167.252.0/22	AS12129	123.Net, Inc.	SAMSA	1024
198.3.47.0/24	AS12129	123.Net, Inc.	National Center for Manufacturing Sciences	256
192.149.240.0/24	AS12129	123.Net, Inc.	Ascent Technologies, Inc	256
207.91.192.0/18	AS54163	AHOSTING	Creative Computer Innovations	16384
216.234.96.0/19	AS12129	123.Net, Inc.	123.Net, Inc.	8192
152.160.160.0/20	AS12129	123.Net, Inc.	2020 Communications LLC	4096
152.160.144.0/22	AS12129	123.Net, Inc.	Vergennes Broadband	1024
209.124.56.0/22	AS12129	123.Net, Inc.	Vergennes Broadband	1024
192.153.192.0/24	AS12129	123.Net, Inc.	National Center for Manufacturing Sciences	256
66.103.224.0/19	AS12129	123.Net, Inc.	123.Net, Inc.	8192
152.160.0.0/17	AS12129	123.Net, Inc.	2020 Communications LLC	32768
147.189.140.0/24	AS12129	123.Net, Inc.	123.Net, Inc.	256
2620:84:c000::/48	AS12129	123.Net, Inc.	SAMSA	~1×10²⁴
192.159.68.0/23	AS12129	123.Net, Inc.	Xpert Technologies, Inc.	512
2606:6680:29::/48	AS12129	123.Net, Inc.	SmartHost LLC	~1×10²⁴
216.109.192.0/20	AS12129	123.Net, Inc.	123.Net, Inc.	4096
74.126.0.0/19	AS12129	123.Net, Inc.	123.Net, Inc.	8192
2607:f790::/32	AS12129	123.Net, Inc.	123.Net, Inc.	~79×10²⁷
209.131.0.0/19	AS12129	123.Net, Inc.	123.Net, Inc.	8192
209.103.128.0/20	AS12129	123.Net, Inc.	EagleQuest, Inc.	4096
149.19.205.0/24	AS12129	123.Net, Inc.	CTITINC	256
65.183.160.0/19	AS12129	123.Net, Inc.	123.Net, Inc.	8192
66.54.96.0/22	AS19310	Point Broadband Fiber Holding, LLC	Point Broadband Fiber Holding, LLC	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:       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


OrgAbuseHandle: RD1464-ARIN
OrgAbuseName:   Duda, Ryan 
OrgAbusePhone:  +1-248-228-8200 
OrgAbuseEmail:  rpd@123.net
OrgAbuseRef:    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

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: RD1464-ARIN
OrgTechName:   Duda, Ryan 
OrgTechPhone:  +1-248-228-8200 
OrgTechEmail:  rpd@123.net
OrgTechRef:    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

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "12129",
    "as_handle" : "AS12129",
    "as_name" : "123NET",
    "tech_contacts" : [ "JNO80-ARIN", "RD1464-ARIN" ],
    "abuse_contacts" : [ "RD1464-ARIN" ],
    "date_created" : "1999-03-30",
    "date_updated" : "2012-03-02",
    "source" : "https://rdap.arin.net/registry/autnum/12129"
  } ],
  "organization" : {
    "handle" : "NETIN-6",
    "name" : "123.Net, Inc.",
    "address" : [ "24700 Northwestern Hwy. STE 700", "Southfield", "MI", "48075", "US" ],
    "street" : "Northwestern Hwy.",
    "city" : "Southfield",
    "state" : "MI",
    "zip_code" : "48075",
    "country" : [ "US" ],
    "date_created" : "2010-11-19",
    "date_updated" : "2017-01-28",
    "source" : "https://rdap.arin.net/registry/entity/NETIN-6",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "JNO80-ARIN",
    "name" : "Nowlan, James",
    "email" : [ "jnowlan@123.net" ],
    "phone" : [ "+1-248-228-8200" ],
    "source" : "https://rdap.arin.net/registry/entity/JNO80-ARIN"
  }, {
    "handle" : "RD1464-ARIN",
    "name" : "Duda, Ryan",
    "email" : [ "rpd@123.net" ],
    "phone" : [ "+1-248-228-8200" ],
    "source" : "https://rdap.arin.net/registry/entity/RD1464-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "RD1464-ARIN",
    "name" : "Duda, Ryan",
    "email" : [ "rpd@123.net" ],
    "phone" : [ "+1-248-228-8200" ],
    "source" : "https://rdap.arin.net/registry/entity/RD1464-ARIN"
  } ]
}

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
AS394289	Hope College	US
AS40089	Bullhorn Inc.	US
AS199524	G-Core Labs S.A.	LU
AS46492	Southwestern Michigan College	US
AS399647	Rumble USA Inc.	US
AS21527	Daystarr Communications	US
AS26554	US Signal Company, L.L.C.	US
AS16509	Amazon.com, Inc.	US
AS714	Apple Inc.	US
AS55269	Critical Signal Technologies, Inc	US
AS14374	Agri Valley Services Corporation	US
AS6461	Zayo Bandwidth	US
AS22941	The HelpDesk Inc	US
AS393256	DTE Energy Company	US
AS394004	Hurley Medical Center	US
AS32590	Valve Corporation	US
AS397282	Castle VPN	US
AS26496	GoDaddy.com, LLC	US
AS401215	MITCHELL PLASTICS	US
AS14711	INGERSOLL CUTTING TOOL COMPANY	US
AS22802	Amerisure Mutual Insurance Company	US
AS394952	Lake Michigan Credit Union	US
AS19748	Sector Link LLC.	US
AS40234	Rapidparts, Inc.	US
AS29838	Atlantic Metro Communications II, Inc.	US
AS53263	Grand Rapids Community College	US
AS30517	Great Lakes Comnet, Inc.	US
AS1299	Arelion Sweden AB	SE
AS19239	KLA Corporation	US
AS3257	GTT Communications Inc.	US
AS16556	TotalChoice Hosting, LLC	US
AS398953	ABC Warehouse	US
AS6453	TATA COMMUNICATIONS AMERICA INC	US
AS19031	CU*Answers, Inc.	US
AS8134	Baraga Telephone Company	US
AS401307	Michigan Statewide Educational Network	US
AS19224	Quantum Services Group, LLC.	US
AS54178	Urban Science Applications, Inc.	US
AS22379	Manifold Services Inc	US
AS398226	Henniges Automotive Holdings, Inc.	US
AS2603	NORDUnet	DK
AS32244	Liquid Web, L.L.C	US
AS1021	CV Tech	US
AS36127	Miller Canfield	US
AS20205	Amplex Electric, Inc.	US
AS54542	K-Data Systems, LLC	US
AS394769	University of Michigan Flint	US
AS2015	Msen, Inc.	US
AS10310	Yahoo Holdings Inc.	US
AS399308	UFP Industries, Inc.	US

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
AS396998	Path Network, Inc.	US
AS1299	Arelion Sweden AB	SE
AS3257	GTT Communications Inc.	US
AS3356	Level 3 Parent, LLC	US
AS6461	Zayo Bandwidth	US

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
AS15154	Network Services Group	US
AS46492	Southwestern Michigan College	US
AS33488	Providence Park Medical Building Group, LLC	US
AS32477	Otava, LLC	US
AS21527	Daystarr Communications	US
AS54932	M3 Wireless Inc.	US
AS27216	Air Advantage LLC	US
AS54542	K Data Systems, LLC	US
AS55269	Critical Signal Technologies, Inc	US
AS14374	Agri Valley Services Corporation	US
AS22941	The HelpDesk Inc	US
AS36197	Computer Data, Inc.	US
AS399293	Hollingsworth Logistics Group LLC	US
AS393256	DTE Energy Company	US
AS14938	Bullseye Telecom	US
AS394004	Hurley Medical Center	US
AS32605	BraveSoftTech Inc	US
AS17143	Winn Telecom	US
AS54840	United Wholesale Mortgage, LLC	US
AS394398	Client Financial Services of Michigan, LLC	US
AS393474	St. Clair County Regional Educational Service Agency	US
AS62606	Sector 7, LLC	US
AS397282	Castle VPN	US
AS401215	MITCHELL PLASTICS	US
AS22802	Amerisure Mutual Insurance Company	US
AS14711	INGERSOLL CUTTING TOOL COMPANY	US
AS394952	Lake Michigan Credit Union	US
AS19748	Sector Link LLC.	US
AS53263	Grand Rapids Community College	US
AS394160	Advanced Radiology Services, P.C.	US
AS40599	Gentex Corporation	US
AS19239	KLA Corporation	US
AS13737	Interconnecx, LLC	US
AS16556	TotalChoice Hosting, LLC	US
AS398953	ABC Warehouse	US
AS397085	Signal Restoration Services	US
AS53352	Henry Ford Health System	US
AS401307	Michigan Statewide Educational Network	US
AS8134	Baraga Telephone Company	US
AS19224	Quantum Services Group, LLC.	US
AS54178	Urban Science Applications, Inc.	US
AS46208	Peninsula Fiber Network, LLC	US
AS399741	BAE Networks	US
AS22379	Manifold Services Inc	US
AS398226	Henniges Automotive Holdings, Inc.	US
AS22878	ACENET, INC.	US
AS63126	Aptient Consulting Group Inc.	CA
AS16939	CARETECH SOLUTIONS INC	US
AS398233	IVSComm, Inc	US
AS36349	3Essentials Inc.	US

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