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
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 1 internet exchange: KleyReX: Peering LAN
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 2.59.155.0/24 | 256 |
0.0%
|
HDTIDC LIMITED | HK | — | — |
| 45.142.152.0/24 | 256 |
0.0%
|
HDTIDC LIMITED | HK | — | — |
| 45.142.155.0/24 | 256 |
0.0%
|
HDTIDC LIMITED | HK | — | — |
| 199.212.57.0/24 | 256 |
0.0%
|
HDTIDC LIMITED | CN | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS212921 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 |
|---|---|---|
| 2.59.155.0/24 | 22,300 | 2026-07-23 20:04:56 |
| 199.212.57.0/24 | 19,273 | 2026-07-23 20:04:57 |
| 45.142.152.0/24 | 18,956 | 2026-07-23 20:04:57 |
| 45.142.155.0/24 | 15,801 | 2026-07-23 20:04:56 |
| 91.204.225.0/24 | 1,533 | 2026-06-08 05:51:24 |
Frequently Asked Questions
What is AS212921?
AS212921 is an Autonomous System Number assigned to Hdtidc Limited. 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 AS212921 announce?
AS212921 announces 1.0K IPv4 addresses distributed across 4 routed CIDR prefixes. The network is registered in Hong Kong.
Who operates AS212921?
AS212921 is operated by HDTIDC LIMITED. The organization is based in Hong Kong. You can view all IP ranges and related ASNs on the organization page.
What country is AS212921 registered in?
AS212921 is registered in Hong Kong. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
