HomeASN LookupAS1103

AS1103 SURFNET-NL SURF B.V.

🇳🇱

Org handle: ORG-Sb3-RIPE

SURFnet, The Netherlands

RIPE NCCallocated
Announced Prefixes (BGP)
108total
101 IPv47 IPv6
IPv4 Addresses
Allocated (RIR)5.6M
Announced (BGP)7.2M
IPv6 Addresses
Allocated (RIR)6.3×10²⁹
Announced (BGP)6.3×10²⁹
Prefix Limit (IPv4)
10,000
Prefix Limit (IPv6)
50
Country
🇳🇱 NL
RIR
RIPE NCC
Status
allocated
Allocated
1993-09-01

Routing hygiene

Score 7/100 · Low risk
RPKI ROA coverage
86.9%
no RPKI invalid prefixes
IRR route objects
100%
no origin mismatches
Hijack signals
0
0 announced against others' ROAs, 0 own announced by others
Upstreams
6
diversity 67/100
  • 13% of announced prefixes (14 of 107) have no valid ROA

Based on 107 announced prefixes, updated daily (2026-10-25). How the score works · RPKI explained

Announced Prefixes

(BGP)108
|
Prefix
RPKI
IRR
Last Seen
129.125.0.0/16
 Valid
RIPE
-
130.37.0.0/16
 Valid
RIPE
-
131.174.0.0/16
 Valid
RIPE
-
131.211.0.0/16
 Valid
RIPE
-
131.224.0.0/16
 Valid
RIPE
-
132.229.0.0/16
 Valid
RIPE
-
134.221.0.0/16
 Valid
RIPE
-
136.231.0.0/16
 Valid
RIPE
-
137.56.0.0/16
 Valid
RIPE
-
137.120.0.0/16
 Valid
RIPE
-
1-10 of 108
1 / 11

Allocated Prefixes

(RIR)78
Prefix
Country
RIR
Status
129.125.0.0/16🇳🇱 NLRIPENCCassigned
130.37.0.0/16🇳🇱 NLRIPENCCassigned
131.174.0.0/16🇳🇱 NLRIPENCCassigned
131.211.0.0/16🇳🇱 NLRIPENCCassigned
131.224.0.0/16🇳🇱 NLRIPENCCassigned
132.229.0.0/16🇳🇱 NLRIPENCCassigned
134.221.0.0/16🇳🇱 NLRIPENCCassigned
136.231.0.0/16🇳🇱 NLRIPENCCassigned
137.56.0.0/16🇳🇱 NLRIPENCCassigned
137.120.0.0/16🇳🇱 NLRIPENCCassigned
1-10 of 78
1 / 8

All 108 announced prefixes of AS1103 →

Downstream Customers(5)

ASNName
AS1199🇳🇱SPEELTUIN-AS SURF B.V.
AS1200🇳🇱AMS-IX1 Amsterdam Internet Exchange B.V.
AS18001🇱🇰DIALOG-AS - Dialog Axiata PLC.
AS131219🇸🇬ISPL-AS-AP - Indosat Singapore Pte. Ltd.
AS214380🇳🇱TIM427 Tim de Boer trading as tim427.net

BGP Neighbours

(seen in AS paths)

Upstreams (7)

Networks AS1103 hands its own prefixes to: transit providers, or peers at an exchange.

  • AS6830LibertyGlobal Liberty Global Europe Holding B.V40
  • AS20562OPEN PEERING Broadband Hosting B.V38
  • AS6204ZET NET INTERKVM HOST22
  • AS3257GTT BACKBONE GTT Communications4
  • AS11537Internet22
  • AS20965GEANT Vereniging2
  • AS24785JOINTTRANSIT Broadband Hosting B.V1

Downstreams (36)

Networks whose own prefixes AS1103 passes on: usually its customers.

  • AS12322PROXAD Free SAS87
  • AS1104Nikhef Stichting Nederlandse Wetenschappelijk Onderzoek Instituten20
  • AS30781JAGUAR Free Pro SAS14
  • AS9145EWETEL EWE TEL10
  • AS1140SIDN Stichting Internet Domeinregistratie Nederland8
  • AS3333RIPE NCC Reseaux IP Europeens Network Coordination Centre (RIPE NCC)8
  • AS51333ARCOLINK ASN Arcolink Telecomunicazioni S.R.L6
  • AS198225MDDSL Mitteldeutsche Gesellschaft Fuer Kommunikation MbH6
  • AS1101IP EEND SURF B.V5
  • AS1124IDDQD4
  • AS1152SIVON SURF B.V4
  • AS1199SPEELTUIN SURF B.V4
  • AS1888CWI NL Stichting Centrum Voor Wiskunde En Informatica4
  • AS288ESA European Space Agency (ESA)3
  • AS1102SMEERBOEL SURF B.V3
  • AS1128TUDELFT NL SURF B.V3
  • AS1145Kennisnet SURF B.V2
  • AS1147MCL SURF B.V2
  • AS1161TUE SURF B.V2
  • AS1162SURFsara SURF B.V2
  • AS1200AMS IX1 Amsterdam Internet Exchange B.V2
  • AS47794ATHEEB Etihad GO Company For Communications2
  • AS207315InternetArchiveEU Stichting Internet Archive2
  • AS215088SIDNLABS Stichting Internet Domeinregistratie Nederland2
  • AS1133UTWENTE SURF B.V1
  • AS1837The North Atlantic Treaty Organization1
  • AS80386connect1
  • AS9050RTD Orange Romania S.A1
  • AS17579KISTI1
  • AS25152K ROOT SERVER Reseaux IP Europeens Network Coordination Centre (RIPE NCC)1
  • AS25182PUBLIEKE OMROEP Stichting Nederlandse Publieke Omroep1
  • AS34087NTE BREDBAND NTE TELEKOM1
  • AS38193Transworld Associates (Pvt.)1
  • AS42165JRC European Commission Directorate General Joint Research Centre1
  • AS197000RIPE NCC AUTHDNS Reseaux IP Europeens Network Coordination Centre (RIPE NCC)1
  • AS206130CARMEL Stichting Carmel College1

Other adjacent networks (50 of 93)

Adjacent to AS1103 in the transit part of AS paths: peers, providers or customers.

  • AS2914NTT America1,477
  • AS6939Hurricane Electric362
  • AS22356Durand Do Brasil Ltda308
  • AS9002RETN Limited210
  • AS1031PEER 1031174
  • AS57463NetIX Communications JSC94
  • AS7195EDGEUNO S.A.S91
  • AS57304RETNRU JSC "RetnNet"88
  • AS39386STC IGW Saudi Telecom Company JSC48
  • AS37468Angola Cables Angola Cables47
  • AS3786LG DACOM Corporation39
  • AS7473Singapore Telecommunications39
  • AS1828Unitas Global28
  • AS196844PIONIER Ams Ix Institute Of Bioorganic Chemistry Polish Academy Of Science, Poznan Supercomputing And Networking Center25
  • AS33891CORE BACKBONE Core Backbone24
  • AS23201Telecel S.A22
  • AS9136WOBCOM21
  • AS37100SEACOM Limited SEACOM Limited21
  • AS137409GSL Networks Pty20
  • AS8473BAHNHOF AB19
  • AS12297TELECOM ARMENIA Telecom Armenia OJSC18
  • AS50263IXP 1 IX EU A Systems Sp. Z O.O18
  • AS8220COLT Technology Services Group Limited11
  • AS5606GTS BACKBONE GTS Telecom10
  • AS5405INTERDOTLINK Inter.Link8
  • AS32787Akamai Technologies8
  • AS15830Equinix (EMEA) Acquisition Enterprises B.V7
  • AS271253LINK BRASIL TELECOMUNICACOES LTDA6
  • AS1820WNET TELECOM USA5
  • AS8426CLARANET Limited5
  • AS20764RASCOM CJSC RASCOM5
  • AS40850UPIX NETWORKS INTERNATIONAL5
  • AS55818MC IX Matrix Internet Exchange RS5
  • AS57344TELEHOUSE EAD5
  • AS4455BSO IX Reach4
  • AS7342VeriSign Infrastructure & Operations4
  • AS13285OPALTELECOM TalkTalk Communications Limited4
  • AS44066DE FIRSTCOLO4
  • AS51088A2B IP B.V4
  • AS1241FORTHNET GR Nova Telecommunications & Media Single Member S.A3
  • AS1680Cellcom Fixed Line Communication L.P3
  • AS4230CLARO S.A3
  • AS8781QA ISP Ooredoo Q.S.C3
  • AS15958CETIN Doo CETIN . Belgrade3
  • AS20804ASN TELENERGO Exatel S.A3
  • AS23764CTGNet3
  • AS30844LIQUID Telecommunications3
  • AS38082True International Gateway3
  • AS55329Telcotech3
  • AS1267ASN WINDTRE WIND TRE S.P.A2

Transfer History

Registry transfers of AS1103 between organisations.

1
ASPA
No ASPA0 upstreams, 5 downstreams
Listed as Upstream Provider by
5 ASNs
View full ASPA details →
Abuse Contact
+31205354444
External Links
RIPE WhoisRIPEstat

Learn more

API
Open
GEThttps://api.ipctl.io/v1/asn/1103

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/1103" | jq