AS205046 FZI-AS-1 FZI Forschungszentrum Informatik

FZI-AS-1 FZI Forschungszentrum Informatik · registered in Germany

IPv4 addresses66,5602 prefixes · 0.002% of announced IPv4

Rank in Germany#92largest network in DE by IPv4 space, of 2,315 · 0.06% of DE

Rank worldwide#2,625of 79,396 networks with IPv4

IPv68 x /32 (524,289 x /48)2 prefixes

CountryGermany2,599 ASNs registered there

Open AS205046 in ASN lookup Look up an IP in this network (141.21.0.1) All networks in Germany

IPv4 prefixes

All 2 prefixes, in address order.

141.21.0.0/16
185.231.132.0/22

IPv6 prefixes

All 2 prefixes.

2001:67c:2acc::/48
2a0c:7500::/29

Similar-sized networks in Germany

ASNNameIPv4 addresses

AS42873#89 MPG-FR-S Max-Planck-Gesellschaft zur Forderung der Wissenschaften e.V.67,072

AS29484#90 RUB-AS Ruhr-Universitaet Bochum66,816

AS199578#91 UNIKL Rheinland-Pfaelzische Technische Universitaet Kaiserslautern-Landau66,816

AS12355#93 HAMCOM-DE HeLi NET Telekommunikation GmbH & Co.66,560

AS34127#94 MUNICH-AIRPORT-AS Flughafen Muenchen GmbH66,560

AS209335#95 TUM-RBG Technical University of Munich66,560

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