AS25248 — BLUETONE-AS The Czech Republic

AS25248 announces 5 IPv4 prefixes covering 106,752 addresses and 2 IPv6 prefixes.

About this network

BLUETONE-AS is operated by Radiokomunikace a.s., a Czech telecommunications provider.

What it's used for

• The address space carries static residential and business connections, evidenced by reverse DNS entries such as static.bluetone.cz and mail.topmodern.cz.
• With 106,752 IPv4 addresses announced across 5 prefixes and 62 observed neighbours, the ratio indicates an access network providing connectivity to end-users rather than a transit provider.

Notable

• Registrants for the majority of prefixes are listed as CRA Hostmasters; RADIOKOMUNIKACE a.s., aligning with the AS holder, while one /24 block is registered to Mesto Jicin.
• The inventory consists of five distinct IPv4 blocks, including a /16 and two /18s, alongside two IPv6 prefixes, reflecting a standard regional ISP footprint.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 82.99.128.0/18
• 84.244.64.0/18
• 85.207.0.0/16
• 193.32.56.0/24
• 212.158.128.0/19
• 2001:67c:2100::/48
• 2a02:a40::/32

Upstream networks

• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS174 Cogent Communications, LLC
• AS29504 Freenet Liberec, z.s.
• AS24482 SG.GS
• AS37721 Virtual Technologies & Solutions
• AS31230 Slovak University of Technology in Bratislava
• AS57463 NetIX Communications JSC

Downstream networks

• AS206438 MX-NET Telekomunikace s.r.o.
• AS47110 Cloud4com s.r.o.
• AS206712 FELDSAM s.r.o.
• AS204351 NAM system, a.s.
• AS213223 GasNet, s.r.o.
• AS215704 NGN CZ s.r.o.
• AS59925 Seonet Multimedia s.r.o.
• AS213359 Jan Korinek
• AS199600 Virtis s.r.o.
• AS39790 Web4U s.r.o.
• AS196822 SELECT SYSTEM, s.r.o.
• AS57496 Praha1.net z.s.p.o.
• AS25192 CZ.NIC, z.s.p.o.
• AS52058 za200.cz s.r.o.
• AS201594 Czech Telecommunication Office
• AS51331 SychrovNET s.r.o
• AS57904 Vevynet s.r.o.
• AS200871 RockawayX Infra s.r.o.
• AS202073 Itego a.s.
• AS207391 E LINKX a.s.
• AS205724 T.S.BOHEMIA a.s.
• AS48405 CGI IT Czech Republic s.r.o.
• AS202556 Blond & Brown s.r.o.
• AS206613 Tipsport.net a.s.
• AS196762 ALKOM Security, a.s.

Adjacent networks

• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS174 Cogent Communications, LLC
• AS206438 MX-NET Telekomunikace s.r.o.
• AS47110 Cloud4com s.r.o.
• AS206712 FELDSAM s.r.o.
• AS25192 CZ.NIC, z.s.p.o.
• AS204351 NAM system, a.s.
• AS213223 GasNet, s.r.o.
• AS215704 NGN CZ s.r.o.
• AS213359 Jan Korinek
• AS59925 Seonet Multimedia s.r.o.
• AS199600 Virtis s.r.o.
• AS39790 Web4U s.r.o.
• AS196822 SELECT SYSTEM, s.r.o.
• AS57496 Praha1.net z.s.p.o.
• AS51331 SychrovNET s.r.o
• AS52058 za200.cz s.r.o.
• AS201594 Czech Telecommunication Office
• AS57904 Vevynet s.r.o.
• AS200871 RockawayX Infra s.r.o.
• AS202073 Itego a.s.
• AS207391 E LINKX a.s.
• AS205724 T.S.BOHEMIA a.s.
• AS48405 CGI IT Czech Republic s.r.o.

Internet exchanges

• Peering.cz — Prague, Czech Republic
• NIX.CZ - Neutral Internet eXchange for the Czech Republic — Prague, Czech Republic
• Slovak Internet eXchange Bratislava — Bratislava, Slovakia