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AS44546 ALFATELECOM-AS ALFA TELECOM s.r.o.

ALFATELECOM-AS ALFA TELECOM s.r.o. · registered in Czechia

IPv4 addresses110,84889 prefixes · 0.004% of announced IPv4
Rank in Czechia#12largest network in CZ by IPv4 space, of 570 · 1.34% of CZ
Rank worldwide#1,787of 79,396 networks with IPv4
IPv6noneno IPv6 routes announced
CountryCzechia599 ASNs registered there
Open AS44546 in ASN lookup Look up an IP in this network (31.148.25.1) All networks in Czechia

IPv4 prefixes

All 89 prefixes, in address order.

  • 31.148.25.0/24
  • 31.148.31.0/24
  • 31.148.64.0/19
  • 31.148.98.0/24
  • 31.148.128.0/22
  • 31.148.142.0/23
  • 31.148.152.0/21
  • 31.148.176.0/20
  • 31.148.200.0/24
  • 31.148.212.0/22
  • 31.148.216.0/24
  • 31.148.220.0/23
  • 31.148.222.0/24
  • 31.148.242.0/23
  • 31.148.247.0/24
  • 91.201.20.0/22
  • 92.38.34.0/24
  • 92.38.46.0/23
  • 92.38.84.0/23
  • 92.38.93.0/24
  • 92.38.94.0/24
  • 92.38.96.0/19
  • 92.253.128.0/18
  • 92.253.201.0/24
  • 92.253.210.0/24
  • 92.253.220.0/22
  • 92.253.224.0/21
  • 93.170.54.0/24
  • 93.170.79.0/24
  • 93.170.81.0/24
  • 93.170.98.0/23
  • 93.170.142.0/24
  • 93.170.176.0/23
  • 93.170.219.0/24
  • 93.170.224.0/21
  • 93.170.242.0/23
  • 93.170.255.0/24
  • 93.171.12.0/23
  • 93.171.143.0/24
  • 93.171.174.0/24
  • 93.171.213.0/24
  • 95.46.28.0/22
  • 95.46.47.0/24
  • 95.46.109.0/24
  • 95.46.122.0/23
  • 95.46.126.0/23
  • 95.46.150.0/23
  • 95.46.184.0/21
  • 95.46.216.0/21
  • 95.46.232.0/21
  • 95.46.240.0/20
  • 95.47.0.0/19
  • 95.47.40.0/21
  • 95.47.48.0/22
  • 95.47.54.0/23
  • 95.47.64.0/19
  • 95.47.100.0/23
  • 95.47.106.0/23
  • 95.47.126.0/24
  • 95.47.128.0/21
  • 95.47.137.0/24
  • 95.47.139.0/24
  • 95.47.141.0/24
  • 95.47.157.0/24
  • 95.47.158.0/23
  • 95.47.166.0/24
  • 95.47.172.0/24
  • 95.47.177.0/24
  • 95.47.204.0/22
  • 95.47.208.0/20
  • 95.47.224.0/21
  • 95.47.245.0/24
  • 146.120.21.0/24
  • 146.120.24.0/21
  • 146.120.171.0/24
  • 146.120.180.0/22
  • 146.120.185.0/24
  • 146.120.204.0/23
  • 146.120.206.0/24
  • 146.120.228.0/23
  • 146.120.235.0/24
  • 146.120.242.0/24
  • 146.158.5.0/24
  • 146.158.7.0/24
  • 146.158.31.0/24
  • 146.158.72.0/24
  • 146.158.78.0/24
  • 146.158.89.0/24
  • 185.67.252.0/24

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ASNNameIPv4 addresses
AS28725#9 CETIN-AS CETIN a.s.134,400
AS16246#10 AS16246 O2 Czech Republic, a.s.133,120
AS25512#11 CDT-AS CD-Telematika a.s.117,760
AS15425#13 COMA PODA a.s.110,592
AS25248#14 BlueTone-AS RADIOKOMUNIKACE a.s.106,752
AS197451#15 VUTBR-AS Brno University of Technology66,816

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