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AS1149SURF B.V.

NetherlandsRegistryRIPE NCC

As of 22nd October 2026, AS1149 (SURF B.V.), a network registered in the Netherlands with RIPE NCC, originates 4 IPv4 prefixes covering 1k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 35,846th-largest of the 79,655 networks we see originating IPv4, and the 502nd-largest of 1,021 in the Netherlands. It is seen behind 1 upstream network, most often AS20473 (The Constant Company, LLC). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

4

IPv6 prefixes

1

IPv4 addresses

1k

IPv6 /64s

8.4M

Upstream graph

The networks AS1149 is seen behind, one and two hops out, drawn from real AS paths.

AS1149Toward the internet core
Upstream graph for AS1149: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS1149SURF B.V.This networkAS20473The Constant Comp…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.

Networks observed one and two hops upstream of AS1149 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

3

adjacent networks

Upstreams
133%
Peers
267%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS1149
NetworkCountryRelationshipPathsVantage pts
AS20473The Constant Company, LLCUSPeer370139

Prefixes

The largest blocks AS1149 originates, widest first.

Largest prefixes originated by AS1149
PrefixAddressesVisibility
145.100.118.0/2425677/77
145.100.119.0/2425677/77
145.116.218.0/2425677/77
145.116.219.0/2425677/77
2001:610:9000::/418.4M × /6462/64

Routing health

How AS1149'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

  • Valid100.0%5
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%5
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 4 prefixes

IPv6 — 1 prefixes

  • /418.4M × /64100.0%1

Recent changes

Announcements that started or stopped since 22nd Sept 2026.

No announcement by AS1149 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.