AS21391
Algerian Broadcasting (Tele Diffusion d'Algerie TDA)
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 →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 80.246.0.0/20 | 4.1K |
2.2%
|
TDA | DZ | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS21391 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 |
|---|---|---|
| 80.246.0.0/20 | 14,882 | 2026-07-23 22:46:50 |
Frequently Asked Questions
What is AS21391?
AS21391 is an Autonomous System Number assigned to Algerian Broadcasting (Tele Diffusion d'Algerie TDA). 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 AS21391 announce?
AS21391 announces 4.1K IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Algeria.
Who operates AS21391?
AS21391 is operated by Algerian Broadcasting (Tele Diffusion d'Algerie TDA). The organization is based in Algeria. You can view all IP ranges and related ASNs on the organization page.
What country is AS21391 registered in?
AS21391 is registered in Algeria. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
