{
  "version": 1,
  "source": "sofia-neterra",
  "location": "Sofia, Bulgaria (Neterra)",
  "measured_at": "2026-09-26T09:02:00.861Z",
  "method": "icmp_ping_4",
  "test_ipv4": "45.84.90.213",
  "disclaimer": "Median RTT from EuroVDC Sofia (Neterra) node to reference probes. Not an SLA; paths vary by ASN. Verify with Looking Glass.",
  "probes": [
    {
      "id": "ist",
      "label": "Istanbul ref",
      "city": "Istanbul",
      "country": "TR",
      "target": "195.175.39.40",
      "notes": "TR public DNS-class unicast ref",
      "ok": false,
      "error": "timeout",
      "rtt_ms_median": null,
      "rtt_ms_avg": null,
      "loss_pct": null,
      "raw_exit": -1
    },
    {
      "id": "fra",
      "label": "Frankfurt ref",
      "city": "Frankfurt",
      "country": "DE",
      "target": "194.25.2.129",
      "notes": "DE carrier unicast ref",
      "ok": false,
      "error": "timeout",
      "rtt_ms_median": null,
      "rtt_ms_avg": null,
      "loss_pct": null,
      "raw_exit": -1
    },
    {
      "id": "lon",
      "label": "London (LINX) ref",
      "city": "London",
      "country": "GB",
      "target": "195.66.224.175",
      "notes": "LINX-area unicast ref",
      "ok": false,
      "error": "timeout",
      "rtt_ms_median": null,
      "rtt_ms_avg": null,
      "loss_pct": null,
      "raw_exit": -1
    },
    {
      "id": "buh",
      "label": "Bucharest ref",
      "city": "Bucharest",
      "country": "RO",
      "target": "86.104.134.1",
      "notes": "RO public unicast ref",
      "ok": false,
      "error": "timeout",
      "rtt_ms_median": null,
      "rtt_ms_avg": null,
      "loss_pct": null,
      "raw_exit": -1
    },
    {
      "id": "gdns",
      "label": "Google DNS anycast",
      "city": "Anycast",
      "country": "XX",
      "target": "8.8.4.4",
      "notes": "Anycast — not a city path; useful global sanity check",
      "ok": false,
      "error": "timeout",
      "rtt_ms_median": null,
      "rtt_ms_avg": null,
      "loss_pct": null,
      "raw_exit": -1
    },
    {
      "id": "odns",
      "label": "OpenDNS anycast",
      "city": "Anycast",
      "country": "XX",
      "target": "208.67.222.222",
      "notes": "Anycast — not a city path; useful global sanity check",
      "ok": false,
      "error": "timeout",
      "rtt_ms_median": null,
      "rtt_ms_avg": null,
      "loss_pct": null,
      "raw_exit": -1
    }
  ]
}