AS15644 FRESENIUS Fresenius SE & Co. KGaA

FRESENIUS Fresenius SE & Co. KGaA · registered in Germany

IPv4 addresses2,3042 prefixes · <0.001% of announced IPv4

Rank in Germany#768largest network in DE by IPv4 space, of 2,315 · <0.01% of DE

Rank worldwide#20,542of 79,396 networks with IPv4

IPv61 x /32 (65,536 x /48)1 prefixes

CountryGermany2,599 ASNs registered there

Open AS15644 in ASN lookup Look up an IP in this network (5.61.64.1) All networks in Germany

IPv4 prefixes

All 2 prefixes, in address order.

5.61.64.0/21
193.41.37.0/24

IPv6 prefixes

All 1 prefix.

2a01:52c0::/32

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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