AS49101 KTCT-ASN CEZNET s.r.o.

KTCT-ASN CEZNET s.r.o. · registered in Czechia

IPv4 addresses13,31214 prefixes · <0.001% of announced IPv4

Rank in Czechia#51largest network in CZ by IPv4 space, of 570 · 0.16% of CZ

Rank worldwide#7,765of 79,396 networks with IPv4

IPv61 x /32 (131,071 x /48)17 prefixes

CountryCzechia599 ASNs registered there

Open AS49101 in ASN lookup Look up an IP in this network (46.36.32.1) All networks in Czechia

IPv4 prefixes

All 14 prefixes, in address order.

46.36.32.0/23
46.36.34.0/24
46.36.42.0/23
46.36.45.0/24
46.36.46.0/23
46.36.48.0/20
82.144.128.0/21
82.144.137.0/24
82.144.138.0/23
82.144.140.0/23
82.144.142.0/24
82.144.144.0/23
82.144.148.0/22
82.144.152.0/21

IPv6 prefixes

All 17 prefixes.

2a02:d00::/32
2a02:25b0::/33
2a02:25b0:8000::/35
2a02:25b0:a000::/37
2a02:25b0:a800::/39
2a02:25b0:aa00::/41
2a02:25b0:aa80::/43
2a02:25b0:aaa0::/45
2a02:25b0:aaa8::/47
2a02:25b0:aaab::/48
2a02:25b0:aaac::/46
2a02:25b0:aab0::/44
2a02:25b0:aac0::/42
2a02:25b0:ab00::/40
2a02:25b0:ac00::/38
2a02:25b0:b000::/36
2a02:25b0:c000::/34

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AS51248#48 HOST-TELECOM Host-Telecom.com s.r.o.14,080

AS207700#49 Reliable-Communications Reliable Communications s.r.o.14,080

AS35592#50 COOLHOUSING-AS Coolhousing s.r.o.13,568

AS34040#52 CZTTNET-AS TTNET s.r.o.13,312

AS28972#53 MSOFT-AS M-SOFT, spol. s r.o.12,800

AS197013#54 SPRINTEL-SRO Sprintel s.r.o.12,288

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