AS1103SURF B.V.
NetherlandsRegistryRIPE NCCAs of 22nd October 2026, AS1103 (SURF B.V.), a network registered in the Netherlands with RIPE NCC, originates 99 IPv4 prefixes covering 7.2M addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 102nd-largest of the 79,655 networks we see originating IPv4, and the 4th-largest of 1,021 in the Netherlands. It is seen behind 42 upstream networks, most often AS6830 (Liberty Global Europe Holding B.V.) and AS20562 (Open Peering (Broadband Hosting B.V.)), and in front of 27 downstream networks. 86% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS1103 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS1103 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.
Neighbouring networks
1,158
adjacent networks
- Upstreams
- 424%
- Peers
- 1,08994%
- Downstreams
- 272%
Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 42.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS6830Liberty Global Europe Holding B.V. |  EU | Peer | 2,907 | 37 |
| AS20562Open Peering (Broadband Hosting B.V.) | NL | Peer | 2,004 | 31 |
| AS3257GTT Communications Inc. |  US | Peer | 1,302 | 15 |
| AS6939Hurricane Electric LLC | US | Peer | 475 | 27 |
| AS7713PT Telkom Indonesia Tbk |  ID | Peer | 435 | 5 |
| AS9002RETN Limited |  GB | Peer | 358 | 6 |
| AS6667Elisa Oyj |  FI | Peer | 352 | 4 |
| AS13030Init7 (Switzerland) Ltd. |  CH | Peer | 348 | 4 |
| AS18106Viewqwest Pte Ltd |  SG | Peer | 310 | 4 |
| AS8298IPng Networks GmbH | CH | Peer | 226 | 2 |
Prefixes
All 102The largest blocks AS1103 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 145.144.0.0/12 | 1M | 76/77 |
| 145.160.0.0/12 | 1M | 76/77 |
| 145.120.0.0/14 | 262k | 77/77 |
| 145.140.0.0/14 | 262k | 77/77 |
| 145.2.0.0/15 | 131k | 77/77 |
| 145.28.0.0/15 | 131k | 77/77 |
| 145.38.0.0/15 | 131k | 77/77 |
| 145.48.0.0/15 | 131k | 77/77 |
| 145.74.0.0/15 | 131k | 77/77 |
| 145.88.0.0/15 | 131k | 77/77 |
Routing health
How AS1103's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.
RPKI origin validation
- Valid86.3%88
- Invalid0.0%0
- No ROA13.7%14
Propagation
- Globally propagated90% of full-feed peers or more99.0%101
- Partially propagated40% to 90%1.0%1
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 99 prefixes
IPv6 — 3 prefixes
- /2934.4B × /6433.3%1
- /4865.5k × /6466.7%2
Recent changes
Announcements that started or stopped since 22nd Sept 2026.
- Withdrawn2001:610:5ea::/4820th Oct 2026
- Announced2001:610:5ea::/484th Oct 2026
- Withdrawn145.216.0.0/1726th Sept 2026
- Withdrawn145.217.0.0/1826th Sept 2026
- Withdrawn145.217.128.0/1826th Sept 2026
- Withdrawn145.217.192.0/1826th Sept 2026
- Announced145.217.192.0/1826th Sept 2026
- Withdrawn145.217.64.0/1826th Sept 2026
- Withdrawn2001:610:168::/4826th Sept 2026
- Withdrawn2001:610:16a::/4826th Sept 2026
- Withdrawn2001:610:16b::/4826th Sept 2026
- Withdrawn2001:610:16c::/4826th Sept 2026
2 announced and 12 withdrawn in all; the most recent are shown.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.