Autonomous System details

AS12874

Fastweb SpA · fastweb.it

Italy

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AS12874 – Fastweb SpA

Field	Value
Country	Italy
Website	fastweb.it
Hosted domains	26,580
IPv4 addresses	3,565,056
IPv6 addresses	1,267,650,600,228,229,401,496,703,205,376
ASN type	ISP
Registry	ripe
Allocated	23 years ago on Sep 13, 2002
Updated	a month ago on Oct 28, 2025

Netblock	Company	Num of IPs
93.32.0.0/12	Fastweb SpA	1,048,576
2.224.0.0/13	Fastweb SpA	524,288
2.232.0.0/13	Fastweb SpA	524,288
93.32.0.0/13	Fastweb SpA	524,288
93.40.0.0/13	Fastweb SpA	524,288
93.48.0.0/13	Fastweb SpA	524,288
93.32.0.0/14	Infrastructure for Fastweb MVNO services	262,144
93.36.0.0/14	Infrastructure for Fastweb MVNO services	262,144
93.40.0.0/14	Fastweb SpA	262,144
93.44.0.0/14	Fastweb SpA	262,144
93.56.0.0/14	Fastweb SpA	262,144
89.96.0.0/15	Fastweb SpA	131,072
93.32.0.0/15	Infrastructure for Fastweb MVNO services	131,072
93.34.0.0/15	Fastweb SpA	131,072
93.36.0.0/15	Fastweb SpA	131,072
93.38.0.0/15	Infrastructure for Fastweb MVNO services	131,072
93.40.0.0/15	Infrastructure for Fastweb's MVNO services	131,072
93.42.0.0/15	Fastweb SpA	131,072
93.44.0.0/15	Infrastructure for Fastweb's MVNO services	131,072
93.46.0.0/15	Fastweb SpA	131,072
93.60.0.0/15	Fastweb SpA	131,072
93.62.0.0/15	Fastweb SpA	131,072
85.18.0.0/16	Fastweb SpA	65,536
89.96.0.0/16	Fastweb SpA	65,536
89.97.0.0/16	Fastweb SpA	65,536
93.33.0.0/16	Infrastructure for Fastweb MVNO services	65,536
93.39.0.0/16	Infrastructure for Fastwebs main location	65,536
93.41.0.0/16	Infrastructure for Fastwebs main location	65,536
93.42.0.0/16	Infrastructure for Fastwebs main location	65,536
93.43.0.0/16	Infrastructure for Fastwebs main location	65,536
83.103.0.0/17	Fastweb SpA	32,768
85.18.0.0/17	Fastweb SpA	32,768
85.18.128.0/17	Fastweb SpA	32,768
92.223.128.0/17	Fastweb SpA	32,768
93.37.0.0/17	Infrastructure for Fastwebs main location	32,768
93.37.128.0/17	Infrastructure for Fastwebs main location	32,768
151.0.128.0/17	Fastweb SpA	32,768
37.186.192.0/18	Fastweb SpA	16,384
81.208.0.0/18	Fastweb SpA	16,384
81.208.64.0/18	Fastweb SpA	16,384
83.103.0.0/18	Fastweb SpA	16,384
83.103.64.0/18	Fastweb SpA	16,384
93.40.128.0/18	Infrastructure for Fastwebs main location	16,384
93.40.192.0/18	Infrastructure for Fastwebs main location	16,384
62.101.64.0/19	Fastweb SpA	8,192
62.101.96.0/19	Fastweb SpA	8,192
193.193.0.0/19	COMPAGNIE FRANCAISE D'ASSURANCE POUR LE COMMERCE EXTERIEUR S.A.	8,192
62.177.0.0/20	SIR s.r.l.	4,096
213.140.0.0/20	Fastweb SpA	4,096
213.140.16.0/20	Fastweb SpA	4,096
213.156.32.0/20	Fastweb SpA	4,096
213.156.48.0/20	Fastweb SpA	4,096
5.152.240.0/21	Sogei Societa' Generale d' Informatica S.p.A.	2,048
31.131.240.0/21	SOCIETA PER AZIONI ESERCIZI AEROPORTUALI SEA	2,048
158.255.240.0/21	NETRIBE S.R.L.	2,048
45.82.228.0/22	Citta' Metropolitana di Milano	1,024
62.101.124.0/22	Infrastructure for Fastweb's main location	1,024
91.225.244.0/22	Netvalue s.r.l.	1,024
92.242.172.0/22	Dedagroup S.P.A	1,024
185.7.112.0/22	Fastweb SpA	1,024
185.36.72.0/22		1,024
185.69.188.0/22	ESSENDI ITALIA S.R.L.	1,024
185.87.68.0/22	Fowhe s.r.l.	1,024
185.219.180.0/22	ARMA DEI CARABINIERI	1,024
193.27.28.0/22	SISTEMI INFORMATIVI S.r.l.	1,024
193.35.4.0/22	Giovanni Di Stefano trading as Ermeslink	1,024
194.59.208.0/22	ENGIE ITALIA S.P.A.	1,024
85.118.144.0/23	MDS NET S.R.L.	512
176.122.196.0/23	DECATHLON Italia S.r.l.	512
185.135.114.0/23	SONICATEL S.R.L.	512
2.16.17.0/24	Akamai Technologies	256
2.19.179.0/24	Akamai Technologies	256
5.1.44.0/24	Viama s.r.l.	256
23.61.204.0/24	Akamai Technologies, Inc.	256
37.99.240.0/24	Irpinia Net-Com SRL	256
37.153.135.0/24		256
45.90.124.0/24	Fondazione Policlinico Universitario Campus Bio-Medico	256
62.182.103.0/24	R.S.T. S.R.L.S.	256
64.126.250.0/24	Cegedim.Cloud SASU	256
78.110.176.0/24	LINKEM CUSTOMERS	256
78.110.177.0/24	LINKEM CUSTOMERS	256
80.67.66.0/24	Akamai Technologies	256
84.53.184.0/24	Akamai Technologies	256
89.39.200.0/24		256
89.43.192.0/24		256
176.122.198.0/24	DECATHLON Italia S.r.l.	256
185.22.84.0/24	Public Cloud Assignment	256
185.22.85.0/24	Public Cloud Assignment Initweb	256
185.27.72.0/24	Flyber s.c.a r.l.	256
185.27.73.0/24	Flyber S.R.L.	256
185.43.19.0/24	Wireless Network 4	256
185.139.48.0/24	Management Network	256
185.139.49.0/24	Roberto Cardone trading as Megacom	256
185.145.103.0/24	MaxMara Fashion Group Srl	256
185.146.134.0/24	INFORMATICA95 SERVIZI SRLS	256
185.162.179.0/24	JOGCORP SAS	256
185.169.184.0/24	UAN COMPANY S.R.L.	256
185.169.185.0/24	UAN COMPANY S.R.L.	256
185.169.186.0/24	UAN COMPANY S.R.L.	256
185.169.187.0/24	UAN COMPANY S.R.L.	256
185.190.214.0/24	FLUENTIS SRL	256
185.190.215.0/24	FLUENTIS SRL	256
185.219.232.0/24	Ferrero Technical Services S.r.l.	256
185.219.234.0/24	Ferrero Technical Services S.r.l.	256
185.223.153.0/24	Invermae Solutions SL	256
193.3.50.0/24	SACE SPA	256
193.42.234.0/24	IN.TE.S.A. S.P.A.	256
193.42.238.0/24	IN.TE.S.A. S.P.A.	256
193.43.16.0/24	Istituto Nazionale di Documentazione, Innovazione e Ricerca educativa (INDIRE)	256
193.43.17.0/24	Istituto Nazionale di Documentazione, Innovazione e Ricerca educativa (INDIRE)	256
193.169.20.0/24		256
194.5.146.0/24	ORG-AIYUN-RIPE	256
194.63.146.0/24	SACE SPA	256
194.99.35.0/24	Olivetti Investments S.R.L.	256

Netblock	Company
2001:b00::/29	Fastweb SpA
2a04:a580::/29	SINET SRL

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WHOIS Details

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                                                ASHandle:       AS12874
                                                OrgID:          AS12874
                                                ASName:         AS12874
                                                ASNumber:       AS12874
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 26,580 domain names hosted across 5,806 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
151.0.245.13	██████████	1,226
93.43.42.39	██████████	570
93.43.42.41	██████████	499
92.223.153.11	██████████	409
93.57.20.24	██████████	358
185.36.74.115	██████████	318
93.42.238.40	██████████	271
93.57.20.10	██████████	269
185.36.73.74	██████████	259
93.46.200.49	██████████	233

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Hosted Domains API & Database

Peers

There are 343 peers for this ASN.

Peers	Name
AS1031	PEER 1031 LLC
AS12481	Trivenet S.R.L.
AS12552	GlobalConnect AB
AS12637	SEEWEB s.r.l.
AS12650	Il Sole 24 Ore SpA
AS1267	WIND TRE S.P.A.
AS12713	OTEGlobe
AS1273	Vodafone Group PLC
AS12779	IT.Gate S.p.A.
AS12969	Vodafone Iceland
AS1299	Arelion Sweden AB
AS13018	Banca Monte Dei Paschi Di Siena S.P.A.
AS13030	Init7 (Switzerland) Ltd.
AS132337	Axclusive
AS13237	euNetworks GmbH
AS13253	Intesa Sanpaolo S.p.A.
AS13254	ARNOLDO MONDADORI EDITORE SPA
AS13284	Playnet S.R.L.
AS137409	GSL Networks Pty LTD
AS14537	Continent 8 LLC
AS14630	Invesco Group Services, Inc.
AS14840	BR.Digital Telecom
AS15553	CERVED GROUP S.p.A.
AS15584	Informatica Alto Adige Spa
AS15605	Connesi s.p.a.
AS15660	Findomestic Banca S.p.A.
AS15830	Equinix (EMEA) Acquisition Enterprises B.V.
AS15831	Security Reply s.r.l.
AS15887	ENGINEERING INGEGNERIA INFORMATICA SPA
AS15981	C.S.E. Consorzio Servizi Bancari Soc. Cons. a r.l.
AS16052	SELECTA INDUSTRIAL OPERATIONS S.P.A
AS16347	ADISTA SAS
AS16552	Tiggee LLC
AS17639	Converge ICT Solutions Inc.
AS1764	Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH
AS18106	Viewqwest Pte Ltd
AS1828	Unitas Global
AS196784	Reale Mutua di Assicurazioni
AS196874	Telenet S.r.l.
AS196880	Leonardo S.p.A.
AS196892	TD Group Italia S.r.l.
AS197845	Cegeka S.P.A.
AS197859	E.S.I. S.n.c di Teofili Elisabetta e C.
AS197891	CONGREGAZIONE CRISTIANA DEI TESTIMONI DI GEOVA
AS197948	Poste Italiane S.p.A.
AS198045	Provincia di Pesaro e Urbino
AS198150	SIACOM JSC
AS198319	ARIA S.p.A.
AS198363	LINK S.R.L.
AS198387	Uniplan Software S.r.l.
AS198800	Packet Loss s.r.l.
AS199342	Universita Cattolica del Sacro Cuore
AS199477	Diesel-s.P.A.
AS199509	Protezione Civile Regione Autonoma Friuli Venezia Giulia
AS199524	G-Core Labs S.A.
AS199864	Interporto di Trieste S.p.A.
AS200073	LUTECH S.P.A.
AS200156	CONAD NORD OVEST SOCIETA' COOPERATIVA
AS200409	Tecnodata Trentina Srl
AS200424	Alessandro Coratelli trading as CODEMA
AS200583	TINEXTA INFOCERT S.p.A
AS200612	Gulf Bridge International Inc.
AS200689	TELEIMPIANTI SRL
AS200761	Real Comm srl
AS200767	Esselunga S.p.A.
AS200786	Azimut Holding S.P.A.
AS200858	Rackone Srl
AS200901	Perolini Sebastiano
AS201045	BASE DIGITALE PLATFORM S.P.A.
AS201095	DIMAR
AS201220	Gruppo EURIS Spa
AS201474	Aircom Service srl
AS201565	ETRURIA WI-FI S.R.L.
AS201919	BonPrix S.r.l.
AS202098	ENEL S.p.A
AS202132	Sysman Progetti & Servizi srl
AS202346	Executive Service S.R.L., Societa Benefit
AS202382	HYTEL S.R.L.
AS202460	webfi srl
AS202507	BARBIERI PASQUALE & C. trading as GROUPMEDIA SAS
AS202617	Kering Eyewear S.p.A.
AS202675	Keliweb S.R.L
AS202803	MVA S.r.l.
AS203601	VALUE TRANSFORMATION SERVICES S.P.A.
AS203612	IDS & UNITELM SRL
AS203672	Telefonica Servizi srl
AS204180	INNET SRL
AS204358	OPEN Dot Com S.p.a.
AS204379	INNOVIA, SICUREZZA, INFORMATICA E TELECOMUNICAZIONI SRL
AS204386	NABIRI S.R.L.
AS204622	Nebula Fiber s.r.l.
AS204651	Sorint Lab Spa
AS204958	KT Solutions S.r.l.s
AS205195	EFSA - European Food Safety Authority
AS20562	Broadband Hosting B.V.
AS205716	Applico Digital Lab S.r.l.
AS205925	Italiana Petroli SpA
AS206135	Nethive SpA
AS206588	CIRILLO MATTEO trading as ITALIA NET-COM
AS206615	COOPSERVICE S. COOP P.A.

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ASN API & Database

Upstreams

There are 7 upstreams for this ASN.

upstreams	Name
AS1273	Vodafone Group PLC
AS1299	Arelion Sweden AB
AS3303	Swisscom (Switzerland) Ltd
AS3356	Level 3 Parent, LLC
AS6461	Zayo Bandwidth
AS6762	TELECOM ITALIA SPARKLE S.p.A.
AS6939	Hurricane Electric LLC

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Downstreams

There are 201 downstreams for this ASN.

Downstreams	Name
AS12481	Trivenet S.R.L.
AS12650	Il Sole 24 Ore SpA
AS13018	Banca Monte Dei Paschi Di Siena S.P.A.
AS13253	Intesa Sanpaolo S.p.A.
AS13254	ARNOLDO MONDADORI EDITORE SPA
AS13284	Playnet S.R.L.
AS15553	CERVED GROUP S.p.A.
AS15584	Informatica Alto Adige Spa
AS15660	Findomestic Banca S.p.A.
AS15831	Security Reply s.r.l.
AS15887	ENGINEERING INGEGNERIA INFORMATICA SPA
AS15981	C.S.E. Consorzio Servizi Bancari Soc. Cons. a r.l.
AS16052	SELECTA INDUSTRIAL OPERATIONS S.P.A
AS196784	Reale Mutua di Assicurazioni
AS196874	Telenet S.r.l.
AS196880	Leonardo S.p.A.
AS196892	TD Group Italia S.r.l.
AS197845	Cegeka S.P.A.
AS197859	E.S.I. S.n.c di Teofili Elisabetta e C.
AS197891	CONGREGAZIONE CRISTIANA DEI TESTIMONI DI GEOVA
AS197948	Poste Italiane S.p.A.
AS198045	Provincia di Pesaro e Urbino
AS198319	ARIA S.p.A.
AS198363	LINK S.R.L.
AS198387	Uniplan Software S.r.l.
AS198800	Packet Loss s.r.l.
AS199342	Universita Cattolica del Sacro Cuore
AS199477	Diesel-s.P.A.
AS199509	Protezione Civile Regione Autonoma Friuli Venezia Giulia
AS199864	Interporto di Trieste S.p.A.
AS200156	CONAD NORD OVEST SOCIETA' COOPERATIVA
AS200409	Tecnodata Trentina Srl
AS200424	Alessandro Coratelli trading as CODEMA
AS200583	TINEXTA INFOCERT S.p.A
AS200689	TELEIMPIANTI SRL
AS200761	Real Comm srl
AS200767	Esselunga S.p.A.
AS200786	Azimut Holding S.P.A.
AS200858	Rackone Srl
AS200901	Perolini Sebastiano
AS201045	BASE DIGITALE PLATFORM S.P.A.
AS201095	DIMAR
AS201220	Gruppo EURIS Spa
AS201474	Aircom Service srl
AS201565	ETRURIA WI-FI S.R.L.
AS201919	BonPrix S.r.l.
AS202098	ENEL S.p.A
AS202132	Sysman Progetti & Servizi srl
AS202346	Executive Service S.R.L., Societa Benefit
AS202382	HYTEL S.R.L.
AS202460	webfi srl
AS202507	BARBIERI PASQUALE & C. trading as GROUPMEDIA SAS
AS202617	Kering Eyewear S.p.A.
AS202675	Keliweb S.R.L
AS202803	MVA S.r.l.
AS203601	VALUE TRANSFORMATION SERVICES S.P.A.
AS203612	IDS & UNITELM SRL
AS203672	Telefonica Servizi srl
AS204180	INNET SRL
AS204358	OPEN Dot Com S.p.a.
AS204379	INNOVIA, SICUREZZA, INFORMATICA E TELECOMUNICAZIONI SRL
AS204386	NABIRI S.R.L.
AS204622	Nebula Fiber s.r.l.
AS204651	Sorint Lab Spa
AS204958	KT Solutions S.r.l.s
AS205195	EFSA - European Food Safety Authority
AS205716	Applico Digital Lab S.r.l.
AS206135	Nethive SpA
AS206588	CIRILLO MATTEO trading as ITALIA NET-COM
AS206615	COOPSERVICE S. COOP P.A.
AS206655	WI-GO Srl
AS206701	Power & Telco SRL
AS206821	Webcom TLC srl
AS206864	Acque S.p.A.
AS206988	Argosid Network S.R.L
AS206992	Salvatore Intravaia
AS207022	Fiber Sicilia Srls
AS207042	Siav S.p.A.
AS207157	CAME S.P.A.
AS207453	Auriga SpA
AS207594	Connectivia S.r.l
AS207697	Immobiliare.it S.p.A.
AS207715	Lcom s.r.l.s.
AS207761	CRONOADSL SRLs
AS207799	BOTANY SRL
AS208000	Roberto Cardone trading as Megacom
AS208354	Alfa.Bit.Omega S.R.L.
AS208788	Cotral S.p.A.
AS208862	SIRIANNI INFORMATICA S.R.L. IN SIGLA SIRINFO S.R.L.
AS209071	Ricca IT S.r.l.
AS209137	Springo Srl
AS209246	Vicariato di Roma
AS209301	AIRNET S.R.L.S.
AS209353	Maurizio Giuseppe Fanari trading as LABEL SISTEMI TECNOLOGICI
AS20942	Intesa Sanpaolo S.p.A.
AS20981	InnovaPuglia SpA
AS209812	Spar Business Services GmbH
AS209887	Biesse S.p.A
AS21006	Segretariato generale della Presidenza della Repubblica
AS210129	ATOMO NETWORKS SRL

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ASN API & Database

Pingable IPs

6,925 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
2.226.152.1	AS12874 Fastweb SpA	`8.51ms` from Frosinone, IT
93.45.129.1	AS12874 Fastweb SpA	`2.55ms` from Frosinone, IT
93.58.140.1	AS12874 Fastweb SpA	`6.59ms` from Frosinone, IT
93.48.57.1	AS12874 Fastweb SpA	`9.41ms` from Frosinone, IT
2.226.24.168	AS12874 Fastweb SpA	`27.46ms` from Frosinone, IT
93.46.80.1	AS12874 Fastweb SpA	`7.04ms` from Milan, IT
93.62.44.139	AS12874 Fastweb SpA	`1.13ms` from Milan, IT
93.41.171.25	AS12874 Fastweb SpA	`1.19ms` from Milan, IT
93.33.242.241	AS12874 Fastweb SpA	`1.13ms` from Milan, IT
93.39.66.33	AS12874 Fastweb SpA	`0.99ms` from Milan, IT
62.101.95.173	AS12874 Fastweb SpA	`6.88ms` from Milan, IT
2.229.49.220	AS12874 Fastweb SpA	`4.50ms` from Milan, IT
93.62.68.115	AS12874 Fastweb SpA	`0.82ms` from Milan, IT
2.228.109.1	AS12874 Fastweb SpA	`5.22ms` from Milan, IT
93.41.206.0	AS12874 Fastweb SpA	`1.58ms` from Milan, IT
81.208.83.202	AS12874 Fastweb SpA	`1.07ms` from Milan, IT
37.186.242.218	AS12874 Fastweb SpA	`1.31ms` from Milan, IT
2.238.192.1	AS12874 Fastweb SpA	`1.07ms` from Milan, IT
93.46.114.129	AS12874 Fastweb SpA	`4.17ms` from Milan, IT
2.225.114.110	AS12874 Fastweb SpA	`20.95ms` from Milan, IT
2.228.241.213	AS12874 Fastweb SpA	`1.06ms` from Milan, IT
2.230.6.190	AS12874 Fastweb SpA	`3.22ms` from Milan, IT
93.44.64.1	AS12874 Fastweb SpA	`3.00ms` from Milan, IT
93.63.211.97	AS12874 Fastweb SpA	`1.28ms` from Milan, IT
92.223.171.34	AS12874 Fastweb SpA	`1.27ms` from Milan, IT

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
84.134.58.58	AS3320 Deutsche Telekom AG	`2.79ms` from Berlin, DE
34.68.43.74	AS396982 Google LLC	`0.11ms` from Council Bluffs, US
49.249.159.122	AS45820 Tata Teleservices ISP AS	`0.56ms` from Delhi, IN
93.210.114.42	AS3320 Deutsche Telekom AG	`3.22ms` from Frankfurt am Main, DE
12.86.78.218	AS7018 AT&T Enterprises, LLC	`1.80ms` from Houston, US
5.2.22.90	AS21472 ServerHouse Ltd	`0.36ms` from London, GB
85.174.63.122	AS33934 OJSC Volgogradelectrosviaz	`18.56ms` from Moscow, RU
68.202.93.106	AS33363 Charter Communications, Inc	`10.98ms` from Orlando, US
38.7.234.10	AS174 Cogent Communications, LLC	`3.69ms` from Osasco, BR
177.185.162.10	AS53008 CABONNET INTERNET LTDA	`9.92ms` from Osasco, BR
90.70.101.58	AS3215 Orange S.A.	`6.03ms` from Paris, FR
118.190.115.106	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.22ms` from Qingdao, CN
67.73.176.218	AS3549 Level 3 Parent, LLC	`0.18ms` from Santiago, CL
187.221.0.26	AS8151 UNINET	`4.77ms` from Santiago de Queretaro, MX
222.68.134.170	AS4812 China Telecom (Group)	`3.41ms` from Shanghai, CN
203.134.102.90	AS9443 Vocus Retail	`0.46ms` from Sydney, AU
178.129.94.218	AS28812 PJSC "Bashinformsvyaz"	`9.16ms` from Yekaterinburg, RU
91.194.243.26	AS43394 Nexi Croatia d.o.o. za karticno poslovanje	`10.53ms` from Zagreb, HR
179.254.58.218	AS8167 V tal	`4.77ms` from Brasilia, BR
41.37.203.218	AS8452 TE-AS	`7.82ms` from Cairo, EG
98.17.123.106	AS7029 Windstream Communications LLC	`15.88ms` from Chicago, US
50.200.136.58	AS7922 Comcast Cable Communications, LLC	`0.91ms` from Chicago, US
87.161.131.250	AS3320 Deutsche Telekom AG	`4.42ms` from Frankfurt am Main, DE
213.120.240.106	AS2856 British Telecommunications PLC	`1.55ms` from London, GB
213.174.205.122	AS3561 CenturyLink Communications, LLC	`2.06ms` from London, GB

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

traceroute -a -n -q1 -m6 2.231.224.148

traceroute to 2.231.224.148 (2.231.224.148): 6 hops max, 52 byte packets

1 [AS2901] 198.59.104.2 0.207 ms

2 [AS2901] 198.59.96.134 0.342 ms

3 [AS2901] 198.59.96.128 0.157 ms

4 *

5 *

6 *

Measurement taken from

IPinfo ProbeNet in Albuquerque, US

On November 28th 2025

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS12874 at robtex.

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