AS38255
China Education and Research Network (CERNET)
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Multiple-origin (MOAS) routing anomaly −12
- Academic allocation +6
- Trust score 59 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 1 MOAS prefix — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS38255 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 118.229.40.0/22 | AS4538, AS38255 | 2026-07-17 08:22:34 |
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 118.229.40.0/21 | 2.0K |
0.1%
|
China Education and Research Network CERNET | CN | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS38255 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 118.229.44.0/22 | 7,632 | 2026-07-18 10:52:59 |
| 118.229.40.0/22 | 7,579 | 2026-07-18 10:52:59 |
Frequently Asked Questions
What is AS38255?
AS38255 is an Autonomous System Number assigned to China Education and Research Network (CERNET). An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS38255 announce?
AS38255 announces 2.0K IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in China.
Who operates AS38255?
AS38255 is operated by China Education and Research Network CERNET. The organization is based in China. You can view all IP ranges and related ASNs on the organization page.
What country is AS38255 registered in?
AS38255 is registered in China. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
