COLITU LAB21 of 21 probes online

Network

AS20473 · The Constant Company, LLC

🇦🇺 Australia · Melbourne, SingaporeDatacenter8,974 tests in 7 days
JSONAPI

Network fingerprint

What this network does to VPN traffic, read from comparing kinds of tests. “Observed” means the measurements are consistent with the behaviour — not proof of intent.

Network classification

Hysteria2Available
VLESS RealityDegraded
VLESS XHTTPAvailable
TrojanAvailable
ShadowsocksDegraded
Server ports (plain TCP)100%

Observed behaviour

Server addresses unreachable (IP or port blocking)Share of plain TCP connections to the servers' ports that failed. Measured: 0.0% failed over 3,880 tests.Not observed
TCP transports fail although the port answersTunnel failure rate of TCP transports minus the failure rate of plain TCP connects to the same ports. A gap points at inspection of the traffic, not at blocked addresses. Measured: a gap of 2.1 points over 3,880 tests.Not observed
QUIC/UDP transports fail more often than TCP onesFailure rate of Hysteria2 (QUIC over UDP) minus that of the TCP transports to the same servers. Measured: a gap of 0.0 points over 962 tests.Not observed
Plain DNS over UDP to public resolvers disruptedFailure rate of DNS queries over UDP minus the same queries over TCP to the same public resolvers. Measured: a gap of 0.0 points over 72 tests.Not observed
HTTPS to neutral websites fails without a VPNFailure rate of direct HTTPS requests to well-known neutral sites. Shows whether the network itself works when tunnels fail. Measured: 0.0% failed over 108 tests.Not observed

Basis

Samples8,974
Window7 days
Last updated1 h ago

How each line is computed: methodology.

Transports

Tunnel tests from this network over the last 7 days.

TransportSuccessMedian connectTestsStatus
Hysteria2100%708 ms962Available
VLESS Reality96.3%926 ms970Degraded
VLESS XHTTP99.4%946 ms970Available
Trojan98.8%956 ms970Available
Shadowsocks97.3%703 ms970Degraded

Success over time

JSONAPI
0%25%50%75%100%4 Oct6 Oct8 Oct10 Oct
Data table
Time (UTC)Hysteria2VLESS RealityVLESS XHTTPTrojanShadowsocks
10 Oct, 06:00–08:00 UTC100% (18)100% (16)100% (16)100% (16)100% (17)
10 Oct, 08:00–10:00 UTC100% (317)96.3% (322)99.4% (322)98.4% (322)96.9% (321)
10 Oct, 10:00–12:00 UTC100% (321)96.3% (323)99.1% (323)99.1% (324)97.5% (325)
10 Oct, 12:00–14:00 UTC100% (306)96.1% (309)99.7% (309)98.7% (308)97.4% (307)

Detected changes

No changes detected on this network.

Vantage points on this network

Melbourne (datacenter)
since 10 Oct 2026, 07:56 UTC
4,491
measurements
Online
Singapore (datacenter)
since 10 Oct 2026, 07:56 UTC
4,491
measurements
Online