AS13004 — SOX Serbian Open Exchange DOO

AS13004 announces 4 IPv4 prefixes covering 1,024 addresses and 1 IPv6 prefixes.

About this network

An internet exchange: 938 neighbours standing behind 1,024 addresses.

What it's used for

• The Serbian Open Exchange, a national internet exchange point. 1,024 addresses across four IPv4 prefixes, one IPv6 prefix, and 938 observed BGP neighbours.

Notable

• The IPv6 prefix is 2001:7f8:1e::/48, inside the range RIPE sets aside for exchange peering LANs.
• Netnames are SOX twice, ZPTA-LAN-B3, and RS-PERKE-20090427, the last registered to an individual trading as an agency.
• Nine of twelve sampled addresses answered. 88.218.139.64 and 91.245.214.64 both return 64.sox.rs, and .127 in each block returns 127.sox.rs.
• Two names belong to content caches: cache.cdn77.com and ggc.sox.rs.

Interesting

• Neighbour count nearly equals address count, a shape only an exchange produces. Every member that peers across the fabric appears as an adjacency, while the fabric itself needs only enough addresses to number the ports.
• 2001:7f8::/32 is reserved for peering LANs, so the IPv6 prefix identifies this as an exchange before anyone reads the name.
• The same reverse names serve two different blocks. The zone was generated from the last octet alone, with no component identifying which block it belongs to, so 64.sox.rs is ambiguous by construction and names a port position rather than a host.
• Content caches sitting inside exchange space are the modern exchange's real draw: members join for the peering and stay for the local copy of the traffic-heavy platforms.

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

Announced prefixes

• 88.218.139.0/24
• 91.245.214.0/24
• 188.120.127.0/24
• 193.105.163.0/24
• 2001:7f8:1e::/48

Upstream networks

• AS6939 Hurricane Electric LLC
• AS3223 Voxility LLP
• AS2914 NTT America, Inc.
• AS9002 RETN Limited
• AS60733 ZORAN PEROVIC trading as Agencija Perke.NET
• AS8280 SYNAPSECOM S.A. Provider of Telecommunications and Internet Services
• AS24482 SG.GS
• AS49673 Truenetwork LLC
• AS37721 Virtual Technologies & Solutions
• AS48362 Stadtwerke Feldkirch
• AS50673 Serverius Holding B.V.
• AS208972 GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETI
• AS31500 Global Network Management Inc
• AS29632 Netassist International EOOD
• AS5511 Orange S.A.

Downstream networks

• AS41897 Sat-Trakt D.O.O.
• AS198371 NINET Company Nis d.o.o.
• AS9125 Drustvo za telekomunikacije Orion telekom doo Beograd-Zemun
• AS205620 Unicom-Telecom d.o.o.
• AS205313 INSPIRA GRUPA DOO SUBOTICA
• AS50872 LOCALHOST d.o.o.
• AS42385 Join-stock company "Internet Exchange"MSK-IX"
• AS203572 Ingram Micro d.o.o. Beograd
• AS25431 Gama Electronics d.o.o.
• AS42473 Anexia Cloud Solutions GmbH
• AS60733 ZORAN PEROVIC trading as Agencija Perke.NET
• AS216053 Data Cloud Technology d.o.o Kragujevac
• AS198691 SPACE Admins d.o.o.
• AS1288 Packet Clearing House, Inc.
• AS47267 Serbian National Internet Domain Registry Foundation
• AS9009 M247 Europe SRL
• AS63293 Facebook, Inc.
• AS42 WoodyNet, Inc.
• AS35779 mCloud doo
• AS213306 Comtrade System Integration doo Belgrade Serbia
• AS205201 Public Service Media Radio Television of Serbia
• AS51859 Mainstream doo Beograd
• AS39311 Mainstream doo Beograd
• AS9119 SOFTNET d.o.o.
• AS32934 Facebook, Inc.

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS198371 NINET Company Nis d.o.o.
• AS41897 Sat-Trakt D.O.O.
• AS208972 GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETI
• AS9125 Drustvo za telekomunikacije Orion telekom doo Beograd-Zemun
• AS3223 Voxility LLP
• AS8280 SYNAPSECOM S.A. Provider of Telecommunications and Internet Services
• AS50673 Serverius Holding B.V.
• AS6204 INTERKVM HOST SRL
• AS205620 Unicom-Telecom d.o.o.
• AS9002 RETN Limited
• AS2914 NTT America, Inc.
• AS12459 NETOPS B.V.
• AS205313 INSPIRA GRUPA DOO SUBOTICA
• AS50872 LOCALHOST d.o.o.
• AS24482 SG.GS
• AS42385 Join-stock company "Internet Exchange"MSK-IX"
• AS37721 Virtual Technologies & Solutions
• AS49673 Truenetwork LLC
• AS203572 Ingram Micro d.o.o. Beograd
• AS48362 Stadtwerke Feldkirch
• AS60733 ZORAN PEROVIC trading as Agencija Perke.NET
• AS25431 Gama Electronics d.o.o.
• AS42473 Anexia Cloud Solutions GmbH
• AS33891 Core-Backbone GmbH

Routing security

• RPKI: 5 valid, 0 invalid and 0 not-found announcements; 5 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 6 route objects.
• Listed in as-sets: AS-BALCANIX, AS-BEOTELNET, AS-BEOTELNET6, AS-HURRICANE, AS-HURRICANEV6, AS-INTEROUTE, AS-MAGYARTELEKOM-PEERS, AS-MAGYARTELEKOM6, AS-MEGAPORT-RS-SOF, AS-OPENTRANSIT, AS-RETN-ACTUAL-V6, AS-RIS-RRC25, AS-SOX, AS-SOX-ADDOS, AS-SOX-INT, AS-SOX-SERBIA, AS-SOX-SRB, AS-VIVA-TR, AS-VIX-MEMBERS, AS52055:AS-NETIX-GR, AS60733:AS-PN-TO-GOOGLE, AS8218:AS-AMSIX-RS.

Internet exchanges

• NetIX — Sofia, Bulgaria
• Peering.cz — Prague, Czech Republic
• Bulgarian Internet eXchange — Sofia, Bulgaria
• Balkan Internet Exchange — Sofia, Bulgaria
• Serbian Open Exchange — Belgrade, Serbia
• IXP.mk — Skopje, North Macedonia
• Megaport MegaIX Sofia — Sofia, Bulgaria