Peering policy

SIDN is the central registry for all domains under the '.nl' top-level domain (ccTLD). SIDN also undertakes the operational management of the ENUM infrastructure ( on behalf of ENUM NL.

With a public role to play, SIDN strives to operate on a completely transparent basis. A comprehensive overview of the organisation and its activities is provided on the corporate website

Being the registry for the .nl country-code top-level domain, we use AS1140 for registry operations and AS48283 to give more resilience to the .nl DNS infrastructure by means of (local) anycast.
In other words; by peering with us, you will improve reachability of authoritative name servers for the .nl top-level domain. Since we use anycast, it makes sense to peer with us directly, even if you already see AS48283 after other ASNs in your routing table.

If you are interested in BGP peering, please contact us at

AS1140 Registry SIDN

We have an open peering policy.

  • We are present at AMS-IX and NL-IX
  • We would prefer not to enter into a peering contract.
  • We do not accept prefixes smaller than /24
  • We will filter bogon prefixes such as IANA reserved networks.
  • We will not accept incoming traffic that should originate from within our network.
  • Our AS at all exchanges is AS1140.
  • We will keep our objects at RIPE up to date and expect you to do the same.
  • We expect you to maintain certain routing standard levels, such as not announcing private AS numbers.
  • We support MD5 passwords on our peerings and we will work with passwords on request.
  • In the event of problems due to leaked advertisements, it is our policy to shut down peerings first and ask questions later.
  • Some parties offer to provide us with IP transit (full routing). If you are willing to do so, please contact us beforehand!

Our details:

AS number 1140
IPv4 Prefix, and
IPv6 Prefix 2a00:d78::/32

Please also accept our anycast AS after AS1140 (or directly when applicable).

AMS-IX IPv4 address
AMS-IX IPv6 address 2001:7f8:1::a500:1140:1
AMX-IX location Global Switch Amsterdam
NL-IX IPv4 address
NL-IX IPv6 address 2001:7f8:13::a500:1140:1
NL-IX location TDCA - Arnhem


AS48283 DNS Anycast

We have a case-by-case peering policy.

Most important:

  • A responsible anti-abuse policy
  • Anti-spoofing filters according to BCP38
  • IPv4 and IPv6
  • Sufficiently relevant for .nl (in terms of DNS-qps and other matters, in SIDN's judgement)

Our details:

AS number 48283
IPv4 Prefix,,,,
IPv6 Prefix 2001:678:8::/48, 2001:678:2c::/48, 2001:678:30::/48,
2001:678:34::/48, 2001:678:38::/48
AMS-IX IPv4 address
AMS-IX IPv6 address 2001:7f8:1::a504:8283:1
AMX-IX location Global Switch Amsterdam


Meander 501
6825 MD Arnhem
The Netherlands