AS198725 ULTIMUM-AS Ultimum Technologies a.s.

ULTIMUM-AS Ultimum Technologies a.s. · registered in Czechia

IPv4 addresses1,2802 prefixes · <0.001% of announced IPv4

Rank in Czechia#266largest network in CZ by IPv4 space, of 570 · 0.02% of CZ

Rank worldwide#27,550of 79,396 networks with IPv4

IPv68 x /32 (524,288 x /48)1 prefixes

CountryCzechia599 ASNs registered there

Open AS198725 in ASN lookup Look up an IP in this network (91.220.201.1) All networks in Czechia

IPv4 prefixes

All 2 prefixes, in address order.

91.220.201.0/24
185.21.196.0/22

IPv6 prefixes

All 1 prefix.

2a02:c280::/29

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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