Autonomous System details

AS1103

SURF B.V. · surf.nl

Netherlands

BitTorrent

Crawler

VPN

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AS1103 – SURF B.V.

Field	Value
Country	Netherlands
Website	surf.nl
Hosted domains	8,916
IPv4 addresses	7,204,096
IPv6 addresses	633,827,717,965,753,929,258,400,000,000
ASN type	Education
Registry	ripe
Allocated	24 years ago on Sep 23, 2002
Updated	a year ago on Apr 30, 2025

Netblock	Company	Num of IPs
145.144.0.0/12	SURFnet bv	1,048,576
145.160.0.0/12	SURFnet bv	1,048,576
145.120.0.0/14	SURFnet bv	262,144
145.140.0.0/14	SURF B.V.	262,144
145.2.0.0/15	Hogeschool Saxion	131,072
145.28.0.0/15	Hogeschool van Amsterdam	131,072
145.38.0.0/15	SURFsara reken cluster	131,072
145.48.0.0/15	Avans Hogeschool	131,072
145.74.0.0/15	Hogeschool van Arnhem en Nijmegen	131,072
145.88.0.0/15	Leiden University Medical Centre	131,072
145.92.0.0/15	Hogeschool van Amsterdam	131,072
145.100.0.0/15	SURFsara	131,072
145.124.0.0/15	ASTRON	131,072
145.136.0.0/15	Hogeschool Rotterdam	131,072
129.125.0.0/16	Rijksuniversiteit Groningen	65,536
130.37.0.0/16	Vrije Universiteit Amsterdam	65,536
131.174.0.0/16	Radboud Universiteit	65,536
131.211.0.0/16	Heidelberglaan 8	65,536
131.224.0.0/16	Rijksinstituut voor Volksgezondheid en Milieuhygiene	65,536
132.229.0.0/16	P.O. box 9500	65,536
134.221.0.0/16	Dutch organization for applied scientific research	65,536
136.231.0.0/16	Stichting Deltares	65,536
137.56.0.0/16	Universiteit van Tilburg	65,536
137.120.0.0/16	P.O.Box 616, 6200 MD, Maastricht, The Netherlands	65,536
137.224.0.0/16	Wageningen University & Research	65,536
139.63.0.0/16	Dutch organization for applied scientific research	65,536
141.252.0.0/16		65,536
143.121.0.0/16	Universitair Medisch Centrum Utrecht	65,536
145.0.0.0/16	SURFnet bv	65,536
145.5.0.0/16	Erasmus Universiteit Rotterdam	65,536
145.9.0.0/16	Deltares	65,536
145.19.0.0/16	HZ University of Applied Sciences	65,536
145.20.0.0/16	Open Universiteit Nederland	65,536
145.23.0.0/16	Koninklijk Nederlands Meteorologisch Instituut	65,536
145.24.0.0/16	Hogeschool Rotterdam	65,536
145.33.0.0/16	Hanzehogeschool Groningen	65,536
145.37.0.0/16	Hanzehogeschool Groningen	65,536
145.41.0.0/16	SURF B.V.	65,536
145.44.0.0/16	Christelijke Hogeschool Windesheim	65,536
145.51.0.0/16	Hogeschool Rotterdam	65,536
145.52.0.0/16	Haagse Hogeschool	65,536
145.76.0.0/16	Hogeschool Saxion	65,536
145.81.0.0/16	Hogeschool Inholland	65,536
145.85.0.0/16	Fontys Hogeschool	65,536
145.90.0.0/16	SURF B.V.	65,536
145.91.0.0/16	Zuyd Hogeschool	65,536
145.95.0.0/16	SURF B.V.	65,536
145.96.0.0/16	SURFnet bv	65,536
145.98.0.0/16	Universiteit Maastricht Lab	65,536
145.102.0.0/16	Stichting De Digitale Sleutel	65,536
145.103.0.0/16	Stichting GlasLokaal	65,536
145.107.0.0/16	Universiteit Utrecht	65,536
145.108.0.0/16	Vrije Universiteit Amsterdam	65,536
145.117.0.0/16	Academic Medical Centre	65,536
145.118.0.0/16	Grafisch Lyceum Rotterdam	65,536
145.126.0.0/16	SURFnet bv	65,536
145.138.0.0/16	ROC Aventus	65,536
156.83.0.0/16	Erasmus MC	65,536
192.87.0.0/16	SURF B.V.	65,536
194.171.0.0/16	SURF B.V.	65,536
195.169.0.0/16	SURF B.V.	65,536
145.1.0.0/17	Koninklijk Nederlands Instituut voor Zeeonderzoek - NIOZ	32,768
145.127.0.0/17	Universiteit Maastricht (UM)	32,768
145.97.64.0/18	ROC Oost-Nederland	16,384
145.97.128.0/18	Rijksuniversiteit Groningen	16,384
145.97.192.0/18	SURF B.V.	16,384
145.116.64.0/18	ROC Mondriaan	16,384
145.116.128.0/18	Radboud Universiteit	16,384
145.137.128.0/18	Radboud Universiteit	16,384
145.116.224.0/19	ROC Oost-Nederland	8,192
145.97.0.0/20	SURF B.V.	4,096
145.97.48.0/20	ROC Oost-Nederland	4,096
145.116.192.0/20	Zeeuwse Bibliotheek	4,096
194.13.16.0/20	Inspectie van het Onderwijs	4,096
194.104.240.0/20	Zuyd Hogeschool	4,096
145.97.24.0/21	Radboud Universiteit	2,048
194.13.112.0/21	St. Antonius Ziekenhuis	2,048
145.97.16.0/22	Hogeschool Leiden	1,024
145.97.20.0/22	SURFnet SURFcloud	1,024
145.107.24.0/22	Radboud Universiteit	1,024
192.42.120.0/22	SURFnet	1,024
192.42.124.0/22	De Zaale 20	1,024
193.177.176.0/22	Máxima Medisch Centrum	1,024
194.26.8.0/22	Fontys Hogeschool	1,024
194.26.12.0/22	Fontys Hogeschool	1,024
192.16.188.0/23	SURFnet bv	512
192.42.114.0/23	Nederlands Kanker Instituut	512
194.104.124.0/23	Amphia Ziekenhuis	512
145.98.16.0/24	SURF B.V.	256
192.31.231.0/24	Vrije Universiteit	256
192.33.36.0/24	Vrije Universiteit	256
192.42.113.0/24	SURFnet bv	256
192.43.212.0/24	Dutch organization for applied scientific research	256
192.104.140.0/24	Centraal Planbureau	256
193.176.235.0/24	Koninklijke Nederlandse Akademie van Wetenschappen	256
194.53.88.0/24	Tilburg	256
194.53.89.0/24	Tilburg	256
194.53.92.0/24	Tilburg	256
194.53.94.0/24	Tilburg	256
194.53.95.0/24	Tilburg	256

Netblock	Company
2001:610::/29	SURF B.V.
2001:67c:1200::/48	Máxima Medisch Centrum
2001:67c:262c::/48	Dienst Uitvoering Onderwijs - DUO

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WHOIS Details

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                                                ASHandle:       AS1103
                                                OrgID:          AS1103
                                                ASName:         AS1103
                                                ASNumber:       AS1103
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 8,916 domain names hosted across 1,520 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
131.224.244.92	██████████	407
195.169.119.134	██████████	368
137.120.30.67	█████████	205
132.229.29.70	██████████	196
131.211.194.230	██████████	195
132.229.92.35	████████	172
137.224.9.30	██████████	166
145.117.214.33	██████████	157
143.121.245.42	██████████	155
137.120.6.130	██████████	142

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Hosted Domains API & Database

Peers

There are 1,070 peers for this ASN.

Peers	Name
AS10099	China Unicom Global
AS10122	NETSTAR (SG) PTE. LTD.
AS1031	PEER 1031 LLC
AS10310	Yahoo Holdings Inc.
AS1101	IP-EEND BV
AS11019	HAProxy Technologies, Inc.
AS1102	SMEERBOEL BV
AS1104	Nikhef
AS112	DNS-OARC
AS1124	Universiteit van Amsterdam
AS1126	Vancis Advanced ICT Services
AS1128	SURF B.V.
AS1133	University Twente
AS1136	KPN B.V.
AS1140	Stichting Internet Domeinregistratie Nederland
AS1145	SURF B.V.
AS1147	SURF B.V.
AS1152	SURF B.V.
AS11537	Internet2
AS1161	SURF B.V.
AS11967	Hop179 OU
AS1199	SURF B.V.
AS1200	Amsterdam Internet Exchange B.V.
AS12189	PhoenixNAP LLC
AS12297	Telecom Armenia AS
AS12322	Free SAS
AS12329	GLASFASER RUHR GmbH & Co. KG
AS12355	HeLi NET Telekommunikation GmbH & Co.
AS12399	q.beyond AG
AS12400	Partner Communications Ltd.
AS1241	Forthnet
AS12414	Solcon Internetdiensten B.V.
AS12440	Hughes Network Systems GmbH
AS1248	HERE Global BV
AS12552	GlobalConnect AB
AS12578	SIA Tet
AS12637	SEEWEB s.r.l.
AS12654	Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
AS1267	WIND TRE S.P.A.
AS12693	e.discom Telekommunikation GmbH
AS12695	LLC Digital Network
AS12703	Pulsant (Scotland) Ltd
AS12713	OTEGlobe
AS12731	IPHH Internet Port Hamburg GmbH
AS12741	Netia SA
AS12759	Stephan Fuss trading as SoftCom Datensysteme
AS12779	IT.Gate S.p.A.
AS12859	BIT BV
AS12871	KPN B.V.
AS12876	Scaleway SAS
AS12888	Amadeus GmbH
AS12897	ENTEGA Medianet GmbH
AS12902	Ekco B.V.
AS12969	Vodafone Iceland
AS12993	Sabiedriba ar ierobezotu atbildibu DELSKA Latvia
AS13000	Leon Sp. z o.o.
AS13002	ISIX Communications LLP
AS13030	Init7 (Switzerland) Ltd.
AS13101	TNG Stadtnetz GmbH
AS131219	Indosat Singapore Pte. Ltd.
AS13122	Manx Telecom Trading Ltd
AS13132	cyberways Informationsdienste GmbH
AS13150	CATO NETWORKS LTD
AS13194	Bite IP Network
AS131958	Tama Cable Network Co.,Ltd.
AS13213	THG HOSTING LIMITED
AS132203	Tencent Building, Kejizhongyi Avenue
AS132337	Axclusive
AS13237	euNetworks GmbH
AS13249	PRIVATE JOINT STOCK COMPANY DATAGROUP
AS13285	TalkTalk Communications Limited
AS132876	Symphony Communication (Thailand) PCL.
AS13289	Krick Management GmbH trading as iWelt GmbH + Co. KG
AS13335	Cloudflare, Inc.
AS133504	PAOCLOUD CO., LTD.
AS133613	MTel telecommunication company ltd.
AS13414	Twitter Inc.
AS13445	Cisco Webex LLC
AS135391	AOFEI DATA INTERNATIONAL COMPANY LIMITED
AS136907	HUAWEI CLOUDS
AS137182	BLUE WIRELESS PTE LTD
AS137367	PT iForte Solusi Infotek
AS137409	GSL Networks Pty LTD
AS138322	Afghan Wireless Communication Company
AS138915	Kaopu Cloud HK Limited
AS139057	Edgenext Legend Dynasty Pte. Ltd.
AS139341	ACE
AS139628	Mega Truenet Communication Co., Ltd.
AS13984	SD Data Center
AS139901	Apple Communication Ltd.
AS14061	DigitalOcean, LLC
AS14127	Iland Internet Solutions Corporation
AS14537	Continent 8 LLC
AS14593	Space Exploration Technologies Corporation
AS14630	Invesco Group Services, Inc.
AS14840	BR.Digital Telecom
AS14907	Wikimedia Foundation Inc.
AS15169	Google LLC
AS15412	FLAG TELECOM UK LIMITED
AS15435	DELTA Fiber Nederland B.V.

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ASN API & Database

Upstreams

There are 6 upstreams for this ASN.

upstreams	Name
AS20562	Broadband Hosting B.V.
AS24785	Broadband Hosting B.V.
AS2914	NTT America, Inc.
AS3257	GTT Communications Inc.
AS6830	Liberty Global Europe Holding B.V.
AS6939	Hurricane Electric LLC

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ASN API & Database

Downstreams

There are 29 downstreams for this ASN.

Downstreams	Name
AS1101	IP-EEND BV
AS1102	SMEERBOEL BV
AS1104	Nikhef
AS112	DNS-OARC
AS1124	Universiteit van Amsterdam
AS1128	SURF B.V.
AS1133	University Twente
AS1140	Stichting Internet Domeinregistratie Nederland
AS1145	SURF B.V.
AS1147	SURF B.V.
AS1152	SURF B.V.
AS1161	SURF B.V.
AS1199	SURF B.V.
AS1200	Amsterdam Internet Exchange B.V.
AS12654	Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
AS1837	The North Atlantic Treaty Organization
AS1888	Stichting Centrum voor Wiskunde en Informatica
AS203769	Cooperatie KIEN u.a.
AS206130	Stichting Carmel College
AS215088	SIDN Labs lab network
AS25152	Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
AS25182	NPO Nederlandse Publieke Omroep
AS288	European Space Agency (ESA)
AS2914	NTT America, Inc.
AS3257	GTT Communications Inc.
AS3333	Reseaux IP Europeens Network Coordination Centre (RIPE NCC)
AS42165	European Commission - Directorate General - Joint Research Centre
AS6830	Liberty Global Europe Holding B.V.
AS6939	Hurricane Electric LLC

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ASN API & Database

Pingable IPs

2,162 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
141.252.242.121	AS1103 SURF B.V.	`4.25ms` from Amsterdam, NL
145.140.21.10	AS1103 SURF B.V.	`4.24ms` from Amsterdam, NL
145.44.233.227	AS1103 SURF B.V.	`2.28ms` from Amsterdam, NL
145.90.37.129	AS1103 SURF B.V.	`0.55ms` from Amsterdam, NL
131.211.193.23	AS1103 SURF B.V.	`1.38ms` from Amsterdam, NL
145.136.142.95	AS1103 SURF B.V.	`4.38ms` from Amsterdam, NL
137.224.96.232	AS1103 SURF B.V.	`4.25ms` from Amsterdam, NL
137.56.51.68	AS1103 SURF B.V.	`14.61ms` from Amsterdam, NL
2001:610:340:a000::2	AS1103 SURF B.V.	`0.74ms` from Amsterdam, NL
145.145.170.81	AS1103 SURF B.V.	`3.23ms` from Amsterdam, NL
131.211.212.129	AS1103 SURF B.V.	`1.83ms` from Amsterdam, NL
131.211.192.45	AS1103 SURF B.V.	`1.28ms` from Amsterdam, NL
145.44.248.2	AS1103 SURF B.V.	`1.99ms` from Amsterdam, NL
145.89.187.1	AS1103 SURF B.V.	`1.74ms` from Amsterdam, NL
194.171.104.200	AS1103 SURF B.V.	`2.37ms` from Amsterdam, NL
141.252.239.1	AS1103 SURF B.V.	`4.36ms` from Amsterdam, NL
145.120.0.18	AS1103 SURF B.V.	`1.14ms` from Amsterdam, NL
141.252.184.1	AS1103 SURF B.V.	`5.94ms` from Amsterdam, NL
143.121.197.40	AS1103 SURF B.V.	`1.54ms` from Amsterdam, NL
145.90.230.129	AS1103 SURF B.V.	`0.52ms` from Amsterdam, NL
145.92.146.1	AS1103 SURF B.V.	`0.69ms` from Amsterdam, NL
192.87.82.1	AS1103 SURF B.V.	`1.42ms` from Amsterdam, NL
145.3.84.1	AS1103 SURF B.V.	`0.76ms` from Amsterdam, NL
145.124.132.65	AS1103 SURF B.V.	`3.87ms` from Amsterdam, NL
145.103.109.254	AS1103 SURF B.V.	`2.22ms` from Amsterdam, NL

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
147.175.84.47	AS2607 Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANET	`1.01ms` from Bratislava, SK
156.194.239.239	AS8452 TE-AS	`8.72ms` from Cairo, EG
98.206.169.255	AS7922 Comcast Cable Communications, LLC	`5.17ms` from Chicago, US
210.212.47.79	AS9829 National Internet Backbone	`6.20ms` from Delhi, IN
88.14.33.143	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.21ms` from Madrid, ES
92.16.33.207	AS13285 TalkTalk Communications Limited	`2.08ms` from Manchester, GB
82.105.226.255	AS3269 Telecom Italia S.p.A.	`4.92ms` from Milan, IT
121.239.18.255	AS4134 CHINANET BACKBONE	`4.98ms` from Nanjing, CN
73.2.51.207	AS7922 Comcast Cable Communications, LLC	`10.47ms` from San Jose, US
43.153.249.63	AS132203 Tencent Building, Kejizhongyi Avenue	`0.20ms` from Singapore, SG
40.115.218.15	AS8075 Microsoft Corporation	`0.16ms` from Tokyo, JP
73.148.97.175	AS7922 Comcast Cable Communications, LLC	`10.32ms` from Ashburn, US
79.130.44.95	AS6799 Ote SA (Hellenic Telecommunications Organisation)	`14.24ms` from Athens, GR
123.28.150.127	AS45899 VNPT Corp	`4.49ms` from Ho Chi Minh City, VN
122.153.209.239	AS9316 DACOM-PUBNETPLUS	`1.96ms` from Incheon, KR
41.22.52.143	AS29975 Vodacom	`14.77ms` from Johannesburg, ZA
108.252.221.127	AS7018 AT&T Enterprises, LLC	`11.44ms` from Los Angeles, US
218.92.112.31	AS4134 CHINANET BACKBONE	`10.47ms` from Nanjing, CN
118.48.93.79	AS4766 Korea Telecom	`1.80ms` from Seoul, KR
43.206.40.159	AS16509 Amazon.com, Inc.	`0.13ms` from Tokyo, JP
109.177.174.143	AS5384 Emirates Internet	`2.60ms` from Al Fujairah City, AE
74.103.222.79	AS701 Verizon Business	`8.64ms` from Boston, US
56.112.27.63	AS16509 Amazon.com, Inc.	`1.59ms` from Calgary, CA
73.246.244.15	AS7922 Comcast Cable Communications, LLC	`5.75ms` from Chicago, US
52.213.221.127	AS16509 Amazon.com, Inc.	`0.14ms` from Dublin, IE

Traceroute

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

traceroute -a -n -q1 -f3 137.56.120.30

traceroute to 137.56.120.30 (137.56.120.30): 64 hops max, 52 byte packets

3 [AS37282] 102.130.224.97 3.232 ms

4 *

5 *

6 *

7 [AS6830] 84.116.134.153 98.398 ms

8 *

9 [AS1103] 145.145.181.181 107.342 ms

10 [AS1103] 145.145.176.41 107.424 ms

11 [AS1103] 145.145.176.111 108.071 ms

12 *

13 *

14 [AS1103] 145.145.14.82 107.217 ms

15 *

16 [AS1103] 137.56.184.21 107.268 ms

17 *

18 [AS1103] 137.56.120.30 107.757 ms

Measurement taken from

IPinfo ProbeNet in Abidjan, CI

On April 24th 2026

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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 AS1103 at robtex.

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