AS21234 GRENKE GRENKE Service GmbH

GRENKE GRENKE Service GmbH · registered in Germany

IPv4 addresses3,8404 prefixes · <0.001% of announced IPv4

Rank in Germany#627largest network in DE by IPv4 space, of 2,315 · <0.01% of DE

Rank worldwide#16,556of 79,396 networks with IPv4

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

CountryGermany2,599 ASNs registered there

Open AS21234 in ASN lookup Look up an IP in this network (217.25.128.1) All networks in Germany

IPv4 prefixes

All 4 prefixes, in address order.

217.25.128.0/21
217.25.136.0/24
217.25.138.0/23
217.25.140.0/22

IPv6 prefixes

All 1 prefix.

2a07:fbc0::/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