Autonomous system detail

AS1104

Announced

Operated by Nikhef.

Summary

// analyst note
Routing figures are a combined route-views2 and route-views6 observation at 2026-11-03T14:00:00Z. AS_PATH neighbours are not verified peers or commercial relationships.
IPv4 prefixes
14
~78.6K addresses
IPv6 prefixes
5
announced
Peer networks
2
0 up · 0 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: Medium  ·  4 sources  ·  How this page is checked

AS1104 is identified as Nikhef’s network operations center, and it was present in the routing snapshot observed at 2026-11-03 14:00 UTC. The combined Route Views observation across route-views2 and route-views6 contained 14 IPv4 prefixes and 5 IPv6 prefixes, representing an estimated 78,592 IPv4 addresses. These are snapshot counts, not a measure of traffic or service use.

Nikhef’s page describes its role in internet development and its neutral interconnection location, Nikhef Housing. It says Nikhef prefers connections through SURF (AS1103) and is connected to NL-IX, Frys-IX, and AMS-IX. The page describes cost-neutral connections for eligible parties; it does not establish that every listed exchange carries routes observed in this snapshot.

For identification or routing triage, compare the observed prefixes and AS_PATHs against a fresh routing view and the relevant registry records. The snapshot’s two observed AS_PATH neighbours are AS1103 and AS57866; adjacency alone does not establish a commercial peer, upstream, or customer relationship. Treat any difference from this dated observation as a lead for further route-level checking, not as proof of a service or security event.

Routing snapshot
At 2026-11-03 14:00 UTC, 14 IPv4 prefixes and 5 IPv6 prefixes were observed in the combined route-views2 and route-views6 observation. [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
Triage
The two observed AS_PATH neighbours are AS1103 and AS57866; adjacency does not establish a business relationship. [Confirmed] — https://archive.routeviews.org/route-views6/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
RIR
ARIN [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
AS name
Nikhef [Confirmed] — https://as1104.nikhef.nl/
Operator
Nikhef [Confirmed] — https://as1104.nikhef.nl/
Country
Unknown [Unknown] — https://as1104.nikhef.nl/
Website
https://as1104.nikhef.nl/ [Confirmed] — https://as1104.nikhef.nl/

Network & routing

Network type
Unknown [Unknown] — https://as1104.nikhef.nl/
Observation scope
combined RouteViews snapshot at 2026-11-03T14:00:00.000Z; route-views2, route-views6 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
ASN
1104 [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
Organization status
Unknown [Unknown] — https://as1104.nikhef.nl/
[ 02 ] — Announced prefixes

What this network routes.

19 prefixes total · as observed by RouteViews at 2026-11-06 · one collector view, not a global census
// IPv4 prefixes14
  1. 145.110.0.0/16/16
  2. 145.116.48.0/20/20
  3. 145.116.208.0/21/21
  4. 194.171.96.0/21/21
  5. 145.102.132.0/22/22
  6. 145.107.4.0/22/22
  7. 185.153.60.0/22/22
  8. 145.116.216.0/24/24
  9. 192.16.185.0/24/24
  10. 192.16.186.0/24/24
  11. 192.16.192.0/24/24
  12. 192.16.194.0/24/24
  13. 192.16.195.0/24/24
  14. 192.16.199.0/24/24
// IPv6 prefixes5
  1. 2a07:8500::/32/32
  2. 2a07:8504::/32/32
  3. 2001:610:120::/48/48
  4. 2a07:8504:120::/48/48
  5. 2a07:8504:1a0::/48/48
[ 03 ] — Notable peers & upstreams

Who it talks to.

2 observed neighbours
// Notable connections2 of 2 observed

Neighbours observed by RouteViews at 2026-11-06, lowest ASN first. Relationships are inferences from the CAIDA AS Relationships Dataset, 2026-08-01, and establish no commercial arrangement; a dash means the inference did not resolve.

ASNOperatorRole
AS1103 — —
AS57866 — —
Neighbours observed via public BGP collectors; not a complete peering list.