MTR from Bulgaria runs a continuous path trace from our Sofia node at Telehouse to your destination, measuring latency and packet loss at every hop. From Sofia, routes to Western Europe typically exit through Aluy's upstream transit before heading northward through Romanian or Serbian networks toward Frankfurt. Routes to Turkey and Greece often take more direct southeast paths through Vivacom or other transit providers with Balkan backbone presence.

A distinctive feature of Bulgarian routing is that traffic to Turkey or Greece from Sofia is often faster than the same traffic from Frankfurt — the geographic advantage is real and shows up clearly in MTR output. If you are troubleshooting a service targeting Eastern Mediterranean users, an MTR from Sofia alongside one from Frankfurt will show you concretely which path is shorter and which transit providers are carrying the traffic in each case.

Loss at an intermediate hop in an MTR from Bulgaria that disappears at subsequent hops is almost always ICMP rate limiting on that router rather than real packet loss. Application traffic through that hop is unaffected. Real packet loss — the kind that matters — is visible as persistent loss that continues at all subsequent hops. If you see this from Sofia but not from other EU nodes, it points to a congested or failing link specific to the path from Bulgarian transit providers to the destination network.

Sofia is the center of Bulgarian internet infrastructure. BIX (Bulgarian Internet Exchange) is the country's primary neutral IX, connecting Bulgarian ISPs, hosting providers, and content networks in Sofia. BIX carries significant regional traffic and is the main peering point for keeping domestic Bulgarian traffic from transiting out of the country. Equinix also operates a colocation facility in Sofia, which added a second neutral peering point and brought international carrier presence directly into the Bulgarian market.

Bulgaria has been an EU member since 2007, and EU investment has helped modernize parts of its broadband infrastructure. Fiber penetration in Sofia and other major cities is solid, though rural coverage remains uneven. The major fixed ISPs are Vivacom (AS8866), A1 Bulgaria (AS6802), and Bulsatcom (AS34224). Vivacom operates the largest national backbone and provides significant transit capacity. Telus International Bulgaria (formerly TTEC) and other technology companies have large operations in Sofia, creating steady demand for quality datacenter connectivity.

Telehouse Sofia is the primary carrier-neutral datacenter in the country and the most connected facility in Bulgaria. It hosts BIX and a large number of ISP and hosting provider PoPs. Sofia's geographic position gives it natural routing relevance for traffic between Western Europe and Turkey, Greece, and the Middle East — paths that transit the Balkans must pass close to Sofia regardless of direction. Several Tier-1 and Tier-2 transit providers maintain Sofia PoPs specifically for this transit role.

Latency from Sofia to other regional cities: Bucharest is around 15 ms, Istanbul around 30 ms, Athens around 30–35 ms, Belgrade around 20 ms, and Frankfurt around 40–45 ms. These figures reflect the direct transit paths available from Sofia. Bulgaria is one of the lower-cost EU hosting jurisdictions, which has made it attractive for operators wanting EU-legal status for their infrastructure at lower colocation prices than Frankfurt or Amsterdam.

Our probe node is in Sofia, on AS211507 via Julian Achter (Aluy), colocated at Telehouse Sofia. This puts the probe in the best-connected facility in the country with access to BIX peering and multiple upstream transit providers. Tests from this node reflect conditions typical of Sofia-hosted services and are broadly representative of Bulgarian network performance. The Telehouse Sofia location means latency from the probe to BIX-connected networks is minimal.