A TCP check from Italy attempts a full handshake to your host on the specified port and records success or failure along with connection time. This bypasses ICMP-specific issues and tests real application-layer reachability. From our Como node, typical TCP connect times to Milan-hosted servers are under 5 ms, to Frankfurt 20–28 ms, and to London 30–38 ms. These figures represent what an Italian user actually experiences when connecting to your service over a standard application port.

Italian ISPs do not commonly apply outbound port filtering on business or datacenter connections, so most ports should be reachable from the probe node. The exception is port 25 (SMTP), which is rate-limited or blocked on many residential and some commercial connections to combat spam. If you are testing an email server and get a TCP failure on port 25 specifically from Italy, try port 587 or 465 to confirm the server is up — the port 25 block may be network-side rather than server-side.

A TCP check failure from Italy that succeeds from Germany or Switzerland is usually caused by one of three things: a firewall rule blocking the source ASN (AS6517), a geo-restriction applied to Italian IP ranges, or asymmetric routing causing the return packet to fail. Compare against our other EU nodes to determine scope. If only Italy fails, check your firewall logs for the source IP of the Como probe and verify it is not caught by an IP reputation or country block.

Milan is Italy's primary internet hub. MIX (Milan Internet Exchange) is the country's largest IX, regularly crossing 800 Gbit/s at peak and connecting several hundred networks including major Italian ISPs, CDNs, and international carriers. The Caldera datacenter campus in Milan houses the MIX fabric along with colocation from global players — making it the natural entry point for traffic destined for northern Italy and a significant peering location for traffic transiting toward the Balkans and Eastern Europe.

Italy's geography plays a direct role in its network topology. The country stretches roughly 1,200 km from north to south, which means Rome sits well over 500 km from Milan. NAMEX serves the Rome interconnect ecosystem and is the main IX for central and southern Italian networks. DE-CIX also operates a Rome point of presence, adding international carrier reach to the capital. TOP-IX in Turin handles northwestern Italy and benefits from proximity to France and Switzerland for cross-border traffic.

Major Italian ISPs include Telecom Italia (AS3269), Fastweb (AS12874), Vodafone Italia (AS30722), Wind Tre (AS1267), and EOLO (AS35612) for fixed broadband in underserved areas. The Italian hosting market is active, with Aruba (AS31034) being one of the largest domestic providers, operating extensive infrastructure in Arezzo and Rome. OVH, Hetzner, and other European operators also maintain PoPs in Italy, though most of the high-volume hosting is concentrated in or near Milan.

CDN traffic into Italy is substantial. Italian eyeball networks pull heavily from Akamai, Cloudflare, and Fastly edge nodes colocated at MIX. Video streaming from Netflix and YouTube represents a large share of Italian evening peak traffic. Because MIX peers directly with most content networks, latency from end users in northern Italy to cached content is typically very low — often under 5 ms for Milan-area users. Southern Italy sees higher latency due to the distance from Milan and the relatively thinner presence of CDN edges south of Rome.

Our probe node is located in Como, northern Italy, on AS6517 via LAKE NETWORKS. Como sits approximately 40 km north of Milan, which means the node has close physical proximity to the MIX fabric. Latency from the Como node to Milan is well under 5 ms. Rome is around 20 ms away. Tests from this node reflect conditions on a northern Italian ISP and are most representative of connectivity in the Lombardy region. For a broader Italian picture, cross-check against nodes in central or southern Europe that peer with Italian carriers.