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AS5501 Fraunhofer-Cluster-BW Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

Fraunhofer-Cluster-BW Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. · registered in Germany

IPv4 addresses121,08837 prefixes · 0.004% of announced IPv4
Rank in Germany#51largest network in DE by IPv4 space, of 2,315 · 0.11% of DE
Rank worldwide#1,701of 79,396 networks with IPv4
IPv613 x /4813 prefixes
CountryGermany2,599 ASNs registered there
Open AS5501 in ASN lookup Look up an IP in this network (129.233.0.1) All networks in Germany

IPv4 prefixes

All 37 prefixes, in address order.

  • 129.233.0.0/17
  • 129.233.163.0/24
  • 129.233.197.0/24
  • 129.233.198.0/23
  • 129.233.203.0/24
  • 129.233.204.0/22
  • 129.233.214.0/23
  • 129.233.218.0/23
  • 129.233.220.0/22
  • 129.233.240.0/20
  • 137.251.0.0/16
  • 153.96.0.0/21
  • 153.96.8.0/23
  • 153.96.10.0/24
  • 153.96.12.0/22
  • 153.96.18.0/23
  • 153.96.24.0/24
  • 153.96.54.0/23
  • 153.96.112.0/23
  • 153.96.126.0/23
  • 153.96.144.0/23
  • 153.96.220.0/22
  • 153.96.248.0/23
  • 153.96.250.0/24
  • 153.96.253.0/24
  • 153.96.254.0/24
  • 153.97.0.0/21
  • 153.97.11.0/24
  • 153.97.26.0/24
  • 192.42.63.0/24
  • 192.42.64.0/24
  • 192.44.0.0/22
  • 192.44.10.0/24
  • 192.44.13.0/24
  • 192.44.17.0/24
  • 192.44.24.0/24
  • 192.102.171.0/24

IPv6 prefixes

All 13 prefixes.

  • 2a03:db80:1c14::/48
  • 2a03:db80:4404::/48
  • 2a03:db80:4410::/48
  • 2a03:db80:4414::/48
  • 2a03:db80:4416::/48
  • 2a03:db80:4420::/48
  • 2a03:db80:4424::/48
  • 2a03:db80:4434::/48
  • 2a03:db80:4460::/48
  • 2a03:db80:4470::/48
  • 2a03:db80:4480::/48
  • 2a03:db80:4484::/48
  • 2a03:db80:4494::/48

Similar-sized networks in Germany

ASNNameIPv4 addresses
AS41289#48 DWD-AS Deutscher Wetterdienst131,072
AS8648#49 ONE-NETWORK dogado GmbH126,208
AS12843#50 TELEMAXX TelemaxX Telekommunikation GmbH124,416
AS8469#52 PIRONETNDH-AS CANCOM Managed Services GmbH116,736
AS12337#53 NORIS-NETWORK noris network AG114,944
AS28753#54 LEASEWEB-DE-FRA-10 Leaseweb Deutschland GmbH113,664

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources