Country
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ASN LANDING PAGE
AS1103
SURFNET-NL - SURF B.V.
Last updated · Apr 4, 2026
Total prefixes
103
IPv4 prefixes
100
IPv6 prefixes
3
ASN summary
How to read the scale of AS1103
SURFNET-NL - SURF B.V. currently shows 103 prefixes and 80 upstream, downstream, or peer relationships. Larger prefix inventories often indicate broader network footprint, but they should still be read together with country and peering context.
When is an ASN page most useful?
ASN landing pages are more useful than a single IP page when you want cloud provider attribution, routing research, infrastructure comparison, or network topology analysis at the organization level.
How should you read the country, organization, and role of AS1103?
SURFNET-NL - SURF B.V. is currently associated with an unknown region. Country data is only a starting point; the more important signals are the organization name, website, prefix volume, and peering relationships that reveal whether the network behaves like a cloud platform, ISP, CDN, or enterprise backbone.
What should you inspect next after the AS1103 page?
This page is currently showing live ASN data that can be used for peer, prefix, and network scale analysis. The most useful next step is usually to return to a related IP landing page, then compare that concrete address with this ASN profile and with broader topic pages for routing, cloud attribution, or WHOIS ownership analysis.
Search intents this ASN page helps cover
AS1103 ASN lookupAS1103 BGPAS1103 peersAS1103 prefixesAS1103 upstreamsSURFNET-NL - SURF B.V. ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS3257
AS3257
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AS4230
AS4230
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AS11537
AS11537
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AS20562
AS20562
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AS37468
AS37468
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AS1031
AS1031
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AS1152
AS1152
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AS1145
AS1145
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AS1102
AS1102
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AS1104
AS1104
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AS1133
AS1133
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AS215088
AS215088
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AS7473
AS7473
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AS1101
AS1101
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AS7049
AS7049
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AS271253
AS271253
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AS4800
AS4800
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AS30844
AS30844
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AS1199
AS1199
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AS1147
AS1147
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AS288
AS288
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AS1124
AS1124
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AS1128
AS1128
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AS1161
AS1161
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AS1837
AS1837
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AS1888
AS1888
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AS42165
AS42165
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AS206130
AS206130
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AS28283
AS28283
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AS8708
AS8708
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AS7552
AS7552
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AS203769
AS203769
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AS17557
AS17557
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AS20965
AS20965
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AS18678
AS18678
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AS1828
AS1828
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AS265269
AS265269
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AS35280
AS35280
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AS17494
AS17494
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AS3333
AS3333
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Peers
AS3257
AS3257
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AS6939
AS6939
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AS6830
AS6830
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AS3333
AS3333
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AS20562
AS20562
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AS9002
AS9002
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AS2914
AS2914
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AS11537
AS11537
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AS24785
AS24785
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AS37468
AS37468
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AS64049
AS64049
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AS22356
AS22356
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AS57463
AS57463
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AS20485
AS20485
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AS1031
AS1031
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AS3216
AS3216
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AS8220
AS8220
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AS4230
AS4230
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AS31133
AS31133
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AS7473
AS7473
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AS20965
AS20965
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AS18678
AS18678
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AS33891
AS33891
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AS137409
AS137409
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AS13335
AS13335
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AS5405
AS5405
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AS9498
AS9498
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AS15412
AS15412
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AS32787
AS32787
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AS20764
AS20764
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AS37100
AS37100
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AS8359
AS8359
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AS7049
AS7049
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AS28283
AS28283
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AS4800
AS4800
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AS6663
AS6663
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AS23764
AS23764
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AS30844
AS30844
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AS37662
AS37662
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AS271253
AS271253
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Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 129.125.0.0/16 | AS1103 | — |
| 130.37.0.0/16 | AS1103 | — |
| 131.174.0.0/16 | AS1103 | — |
| 131.211.0.0/16 | AS1103 | — |
| 131.224.0.0/16 | AS1103 | — |
| 132.229.0.0/16 | AS1103 | — |
| 134.221.0.0/16 | AS1103 | — |
| 136.231.0.0/16 | AS1103 | — |
| 137.120.0.0/16 | AS1103 | — |
| 137.224.0.0/16 | AS1103 | — |
| 137.56.0.0/16 | AS1103 | — |
| 139.63.0.0/16 | AS1103 | — |
| 141.252.0.0/16 | AS1103 | — |
| 143.121.0.0/16 | AS1103 | — |
| 145.0.0.0/16 | AS1103 | — |
| 145.1.0.0/17 | AS1103 | — |
| 145.100.0.0/15 | AS1103 | — |
| 145.102.0.0/16 | AS1103 | — |
| 145.103.0.0/16 | AS1103 | — |
| 145.107.0.0/16 | AS1103 | — |
| 145.107.24.0/22 | AS1103 | — |
| 145.108.0.0/16 | AS1103 | — |
| 145.116.128.0/18 | AS1103 | — |
| 145.116.192.0/20 | AS1103 | — |
| 145.116.224.0/19 | AS1103 | — |
| 145.116.64.0/18 | AS1103 | — |
| 145.117.0.0/16 | AS1103 | — |
| 145.118.0.0/16 | AS1103 | — |
| 145.120.0.0/14 | AS1103 | — |
| 145.124.0.0/15 | AS1103 | — |
| 145.126.0.0/16 | AS1103 | — |
| 145.127.0.0/17 | AS1103 | — |
| 145.136.0.0/15 | AS1103 | — |
| 145.137.128.0/18 | AS1103 | — |
| 145.138.0.0/16 | AS1103 | — |
| 145.140.0.0/14 | AS1103 | — |
| 145.144.0.0/12 | AS1103 | — |
| 145.160.0.0/12 | AS1103 | — |
| 145.19.0.0/16 | AS1103 | — |
| 145.2.0.0/15 | AS1103 | — |
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AS16509 · Amazon
A useful ASN landing page for understanding AWS and large cloud-network ownership.
Related lookups and next steps
WHOIS vs ASN Ownership Guide
Continue from this ASN into the differences between WHOIS ownership and ASN ownership.
Routing Troubleshooting and Network Analysis
Continue from this ASN into route troubleshooting and network analysis.
Cloud Network and ASN Comparison
Useful when you want to compare this ASN against larger cloud and edge networks.
WHOIS and IP Ownership Guide
Continue from the ASN page into WHOIS and ownership verification.
Frequently asked questions about this ASN page
What does AS1103 represent?
AS1103 is an autonomous system number used to identify an independently operated network. The current page associates it with SURFNET-NL - SURF B.V. in an unknown region, which helps determine whether it behaves like a cloud provider, ISP, CDN, or enterprise backbone.
What are peers, upstreams, and prefixes useful for on the AS1103 page?
They help explain the scale, interconnection depth, and route structure of AS1103. Richer peering and upstream data often indicate broader network reach, but they should still be interpreted together with prefixes and related IP landing pages.
What should you do after reviewing AS1103?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS1103, then continue into cloud, WHOIS, or routing topic pages to understand the network in a broader context.
Related topics
WHOIS vs ASN Ownership Guide
Understand why WHOIS ownership and ASN ownership can differ, and how to combine both when deciding who really owns or operates an IP.
WHOIS and IP Ownership Guide
Use WHOIS, ASN, prefixes, and organization data to determine who ultimately owns an IP, range, or resolved domain target.
BGP and ASN Basics Guide
Learn what ASN, BGP routes, prefixes, upstreams, downstreams, and peers mean, then explore real ASN pages.
Cloud Network and ASN Comparison
Compare large cloud and edge networks such as Google, Cloudflare, Microsoft, and Amazon through their ASN landing pages.